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Author Topic: The Unthinkable: Swapped out 5D3 for 6D  (Read 40875 times)

J.R.

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #210 on: December 19, 2013, 03:21:06 AM »
I've owned the 85L for a grand 3 days now and so far, I've found it to work pretty accurately on the 5D3. I'd guess the focusing would be even better on the 1DX.

Interesting - do you use af point expansion or single point af? Just looking at the specs, a 5d3/1dx center point shouldn't be better at af'ing than the 5d2/6d if the f2.8 line picks up, but on the other hand everybody states that f1.2 on 5d2/6d is horrible to use and that's why I've given up on the idea to buy such a fast lens... but mostly because focus & recompose from the center point is so tricky.

I use both AF point expansion as well as single point AF. I've taken a fair few shots of my daughters with the corner AF points with a pretty good hit rate. For the 5D3, the 85L falls in group-A where you have the additional 20 cross type AF points (f/4 vertical and f/5.6 horizontal) enabled (see blue focus points in below image).

The images which were out of focus were more because of my poor technique than the gear. I've found rocking back or forward ever so slightly when shooting with very limited DOF will render the shot OOF.

Same goes for situations where the subject is in motion. I had a hell of a time last night trying to shoot my 1 year old niece in very low light - she was seldom still and I got plenty of OOF shots shooting wide open - stopping down to f/2 and more increasing the DOF improved the images.

As far as I am concerned, the 85L focuses excellently with the outer points on the 5D3 unless it is user error and/or subject is in motion. "Sincere" doubts over its focusing ability without having tested the combo are obviously unfounded.

I've also heard (maybe someone can confirm if I am correct) that the 85L focuses faster on the 1DX. Supposedly, the 1DX supplies additional power to the lens motor which makes it faster.
« Last Edit: December 19, 2013, 03:27:59 AM by J.R. »
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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #210 on: December 19, 2013, 03:21:06 AM »

JohnDizzo15

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #211 on: December 19, 2013, 05:40:11 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #212 on: December 19, 2013, 06:25:11 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

That was why a new AF system for the 5D III was such a highly requested thing. The 6D basically has the same thing as the 5D II, with some of the hidden assist points made visible and selectable. The slight jitter that causes those misses is also present in the 7D's 19pt AF system...it just doesn't sit still between shots...even if the subject is already locked, there is pretty much ALWAYS movement, ever so slight, between every frame. Drives me nuts, and one of the primary reasons a 5D III is at the top of my list for the next piece of gear I get.

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #213 on: December 19, 2013, 06:27:26 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

I'm going to go out on a limb and assume you have done a proper AFMA with the lens.  I haven't used the 85II myself with a 6D or otherwise, but I don't have any issues with the 135L; I get consistent, repeatable results.  The 85II should be usable on a 6D; plenty of people were shooting with it on a 5DII, which I can attest had a slightly inferior AF system to the 6D.
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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #214 on: December 19, 2013, 06:47:35 PM »
The slight jitter that causes those misses is also present in the 7D's 19pt AF system...it just doesn't sit still between shots...even if the subject is already locked, there is pretty much ALWAYS movement, ever so slight, between every frame.

Of what mode are you talking about - servo af or one-shot with continuous fps?

What I experience on both the 6d and 60d with a thinner dof like on the 100L is that when you re-af at the same point w/o camera movement, the lens will often choose a slightly different focus... and lensrentals says it's even better to af somewhere completely else first as this gives more exact results than slight af corrections.

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #215 on: December 19, 2013, 06:59:18 PM »
The slight jitter that causes those misses is also present in the 7D's 19pt AF system...it just doesn't sit still between shots...even if the subject is already locked, there is pretty much ALWAYS movement, ever so slight, between every frame.

Of what mode are you talking about - servo af or one-shot with continuous fps?

What I experience on both the 6d and 60d with a thinner dof like on the 100L is that when you re-af at the same point w/o camera movement, the lens will often choose a slightly different focus... and lensrentals says it's even better to af somewhere completely else first as this gives more exact results than slight af corrections.

Either, in the case of the 7D, but it is more pronounced with Servo. This isn't a DOF problem. It happens with all my lenses, wide open or stopped down considerably. I had the problem with my 600/4II when stopped down to f/8 just the other day. For such a long lens like that, DOF is pretty small when you get close enough to a bird to be "frame filling", and even at f/8, the jitter can still result in slight softening of detail that isn't exactly at the plane of focus. I like the 7D, but the AF jitter is the single largest IQ drawback of the camera.

All of my lens are properly AFMAed as well. I've used manual techniques as well as FoCal to calibrate each of my lenses. Even shifting AFMA about 2-3 notches results in a visible change with the 600mm lens, so when the lens is that sharp, slight changes in the focal plane can mean visible changes elsewhere, unless you are downsampling by 2x or more. (When downsampling, it is never really a problem, but I generally print 24x36 and larger, so it really matters.)

JohnDizzo15

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #216 on: December 19, 2013, 08:00:19 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

I'm going to go out on a limb and assume you have done a proper AFMA with the lens.  I haven't used the 85II myself with a 6D or otherwise, but I don't have any issues with the 135L; I get consistent, repeatable results.  The 85II should be usable on a 6D; plenty of people were shooting with it on a 5DII, which I can attest had a slightly inferior AF system to the 6D.

AFMA'd with Reikan FoCal three consecutive times yielding the same result. Figured it was good enough. I surprisingly have had the same findings as you regarding the 135 on the 6D. Seems to be just fine. But for some reason, the 85II on both occasions has been somewhat unreliable compared to when it was paired with my 5d3. The other ones that have given me the most problems is the 24II and the 24-70II. The zoom wasn't unreliable as far as AF goes, just seemed to hunt noticeably more in and in decent light which was odd. Most the other stuff has been fine.

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #216 on: December 19, 2013, 08:00:19 PM »

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #217 on: December 20, 2013, 09:16:33 AM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

I'm going to go out on a limb and assume you have done a proper AFMA with the lens.  I haven't used the 85II myself with a 6D or otherwise, but I don't have any issues with the 135L; I get consistent, repeatable results.  The 85II should be usable on a 6D; plenty of people were shooting with it on a 5DII, which I can attest had a slightly inferior AF system to the 6D.

AFMA'd with Reikan FoCal three consecutive times yielding the same result. Figured it was good enough. I surprisingly have had the same findings as you regarding the 135 on the 6D. Seems to be just fine. But for some reason, the 85II on both occasions has been somewhat unreliable compared to when it was paired with my 5d3. The other ones that have given me the most problems is the 24II and the 24-70II. The zoom wasn't unreliable as far as AF goes, just seemed to hunt noticeably more in and in decent light which was odd. Most the other stuff has been fine.

That is interesting.  I wonder if it due to the nature of the newer lenses being optimized for 1DX and 5III AF?  I'm actually very surprised at more hunting with the center point, which has (on paper) greater sensitivity to anything else Canon has.  I always use single point AF, myself, and in good light I don't have problems with any of my lenses on my 6Ds.  And that center point can lock onto just about anything in any light.
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JohnDizzo15

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #218 on: December 20, 2013, 12:40:58 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

I'm going to go out on a limb and assume you have done a proper AFMA with the lens.  I haven't used the 85II myself with a 6D or otherwise, but I don't have any issues with the 135L; I get consistent, repeatable results.  The 85II should be usable on a 6D; plenty of people were shooting with it on a 5DII, which I can attest had a slightly inferior AF system to the 6D.

AFMA'd with Reikan FoCal three consecutive times yielding the same result. Figured it was good enough. I surprisingly have had the same findings as you regarding the 135 on the 6D. Seems to be just fine. But for some reason, the 85II on both occasions has been somewhat unreliable compared to when it was paired with my 5d3. The other ones that have given me the most problems is the 24II and the 24-70II. The zoom wasn't unreliable as far as AF goes, just seemed to hunt noticeably more in and in decent light which was odd. Most the other stuff has been fine.

That is interesting.  I wonder if it due to the nature of the newer lenses being optimized for 1DX and 5III AF?  I'm actually very surprised at more hunting with the center point, which has (on paper) greater sensitivity to anything else Canon has.  I always use single point AF, myself, and in good light I don't have problems with any of my lenses on my 6Ds.  And that center point can lock onto just about anything in any light.

This was actually during shoots so I was using all the points without paying too much attention to how often it was the center. Just based on feel/memory though, I don't believe I use the center point much more often than the outer points when composing if at all. I have definitely noticed that the center point has caught focus with a few of my lenses in very low light situations where I think I might have had a little more trouble previously. However, I am finding that doesn't help me all that much as I compose very frequently outside of the center which is probably more of an exhibition of how weak those outer non center points really are.

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #219 on: December 20, 2013, 03:10:34 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

I'm going to go out on a limb and assume you have done a proper AFMA with the lens.  I haven't used the 85II myself with a 6D or otherwise, but I don't have any issues with the 135L; I get consistent, repeatable results.  The 85II should be usable on a 6D; plenty of people were shooting with it on a 5DII, which I can attest had a slightly inferior AF system to the 6D.

AFMA'd with Reikan FoCal three consecutive times yielding the same result. Figured it was good enough. I surprisingly have had the same findings as you regarding the 135 on the 6D. Seems to be just fine. But for some reason, the 85II on both occasions has been somewhat unreliable compared to when it was paired with my 5d3. The other ones that have given me the most problems is the 24II and the 24-70II. The zoom wasn't unreliable as far as AF goes, just seemed to hunt noticeably more in and in decent light which was odd. Most the other stuff has been fine.

That is interesting.  I wonder if it due to the nature of the newer lenses being optimized for 1DX and 5III AF?  I'm actually very surprised at more hunting with the center point, which has (on paper) greater sensitivity to anything else Canon has.  I always use single point AF, myself, and in good light I don't have problems with any of my lenses on my 6Ds.  And that center point can lock onto just about anything in any light.

This was actually during shoots so I was using all the points without paying too much attention to how often it was the center. Just based on feel/memory though, I don't believe I use the center point much more often than the outer points when composing if at all. I have definitely noticed that the center point has caught focus with a few of my lenses in very low light situations where I think I might have had a little more trouble previously. However, I am finding that doesn't help me all that much as I compose very frequently outside of the center which is probably more of an exhibition of how weak those outer non center points really are.

This little discussion may be key to at least some of the varying opinions on the AF of the 6D.  I think it depends on one's shooting style.  I tend to be a little more deliberate in my approach, and, frankly, the 6D works for me. I can't remember the last time I let a camera automatically select the AF point.  I have had my most successful year commercially shooting 6D bodies exclusively.  I don't have any problems at weddings and events, myself, but I do know my gear pretty well.  IQ trumps all for me, and the 6D delivers as well or better than any other current Canon option.

But I have never recommended the 6D to those who shoot sports or a lot of action.  They need a more robust AF.  If they are a less deliberate shooter or prefer to use zones/auto AF the 6D may not serve them as well either because its AF points are not spread out super wide and there aren't that many of them. 

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bleephotography

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #220 on: December 20, 2013, 05:02:11 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

I'm going to go out on a limb and assume you have done a proper AFMA with the lens.  I haven't used the 85II myself with a 6D or otherwise, but I don't have any issues with the 135L; I get consistent, repeatable results.  The 85II should be usable on a 6D; plenty of people were shooting with it on a 5DII, which I can attest had a slightly inferior AF system to the 6D.

AFMA'd with Reikan FoCal three consecutive times yielding the same result. Figured it was good enough. I surprisingly have had the same findings as you regarding the 135 on the 6D. Seems to be just fine. But for some reason, the 85II on both occasions has been somewhat unreliable compared to when it was paired with my 5d3. The other ones that have given me the most problems is the 24II and the 24-70II. The zoom wasn't unreliable as far as AF goes, just seemed to hunt noticeably more in and in decent light which was odd. Most the other stuff has been fine.

That is interesting.  I wonder if it due to the nature of the newer lenses being optimized for 1DX and 5III AF?  I'm actually very surprised at more hunting with the center point, which has (on paper) greater sensitivity to anything else Canon has.  I always use single point AF, myself, and in good light I don't have problems with any of my lenses on my 6Ds.  And that center point can lock onto just about anything in any light.

This was actually during shoots so I was using all the points without paying too much attention to how often it was the center. Just based on feel/memory though, I don't believe I use the center point much more often than the outer points when composing if at all. I have definitely noticed that the center point has caught focus with a few of my lenses in very low light situations where I think I might have had a little more trouble previously. However, I am finding that doesn't help me all that much as I compose very frequently outside of the center which is probably more of an exhibition of how weak those outer non center points really are.

This little discussion may be key to at least some of the varying opinions on the AF of the 6D.  I think it depends on one's shooting style.  I tend to be a little more deliberate in my approach, and, frankly, the 6D works for me. I can't remember the last time I let a camera automatically select the AF point.  I have had my most successful year commercially shooting 6D bodies exclusively.  I don't have any problems at weddings and events, myself, but I do know my gear pretty well.  IQ trumps all for me, and the 6D delivers as well or better than any other current Canon option.

But I have never recommended the 6D to those who shoot sports or a lot of action.  They need a more robust AF.  If they are a less deliberate shooter or prefer to use zones/auto AF the 6D may not serve them as well either because its AF points are not spread out super wide and there aren't that many of them.

Excellent advice as always, Dustin. Have you, by chance, used any fast primes like the 85 f/1.2 or 35 f/1.4 with either of your 6D bodies? I had the 6D for a limited time and found the outer points regularly inconsistent with such a shallow DOF, which is one of the main reasons I reverted back to the 5D3 (aside from dual card slots). What are your overall thoughts on using fast glass with the 6D, as you obviously know how to use it well - your images speak for themselves!
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JohnDizzo15

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #221 on: December 20, 2013, 06:14:32 PM »
This little discussion may be key to at least some of the varying opinions on the AF of the 6D.  I think it depends on one's shooting style.  I tend to be a little more deliberate in my approach, and, frankly, the 6D works for me. I can't remember the last time I let a camera automatically select the AF point.  I have had my most successful year commercially shooting 6D bodies exclusively.  I don't have any problems at weddings and events, myself, but I do know my gear pretty well.  IQ trumps all for me, and the 6D delivers as well or better than any other current Canon option.

But I have never recommended the 6D to those who shoot sports or a lot of action.  They need a more robust AF.  If they are a less deliberate shooter or prefer to use zones/auto AF the 6D may not serve them as well either because its AF points are not spread out super wide and there aren't that many of them.

I never let the camera select the points for me either. I always select single points and it is simply having problems with static subjects on the outer points when using the lenses previously mentioned. Consistency and accuracy are just not there like they were when I was using the same lenses on the 5D3 and selecting the outer points respectively.

I agree that the IQ is the number one factor for me. On that criteria alone, the 6D does as well as any other Canon body. But my issue is that even after calibration, several of my most often used lenses are not getting the same type of AF performance as before outside of the center point. Focus and recompose is something that also does not work for me with my fast lenses so it has been a bit of an adjustment.

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #222 on: December 20, 2013, 06:23:46 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

I'm going to go out on a limb and assume you have done a proper AFMA with the lens.  I haven't used the 85II myself with a 6D or otherwise, but I don't have any issues with the 135L; I get consistent, repeatable results.  The 85II should be usable on a 6D; plenty of people were shooting with it on a 5DII, which I can attest had a slightly inferior AF system to the 6D.

AFMA'd with Reikan FoCal three consecutive times yielding the same result. Figured it was good enough. I surprisingly have had the same findings as you regarding the 135 on the 6D. Seems to be just fine. But for some reason, the 85II on both occasions has been somewhat unreliable compared to when it was paired with my 5d3. The other ones that have given me the most problems is the 24II and the 24-70II. The zoom wasn't unreliable as far as AF goes, just seemed to hunt noticeably more in and in decent light which was odd. Most the other stuff has been fine.

That is interesting.  I wonder if it due to the nature of the newer lenses being optimized for 1DX and 5III AF?  I'm actually very surprised at more hunting with the center point, which has (on paper) greater sensitivity to anything else Canon has.  I always use single point AF, myself, and in good light I don't have problems with any of my lenses on my 6Ds.  And that center point can lock onto just about anything in any light.

This was actually during shoots so I was using all the points without paying too much attention to how often it was the center. Just based on feel/memory though, I don't believe I use the center point much more often than the outer points when composing if at all. I have definitely noticed that the center point has caught focus with a few of my lenses in very low light situations where I think I might have had a little more trouble previously. However, I am finding that doesn't help me all that much as I compose very frequently outside of the center which is probably more of an exhibition of how weak those outer non center points really are.

This little discussion may be key to at least some of the varying opinions on the AF of the 6D.  I think it depends on one's shooting style.  I tend to be a little more deliberate in my approach, and, frankly, the 6D works for me. I can't remember the last time I let a camera automatically select the AF point.  I have had my most successful year commercially shooting 6D bodies exclusively.  I don't have any problems at weddings and events, myself, but I do know my gear pretty well.  IQ trumps all for me, and the 6D delivers as well or better than any other current Canon option.

But I have never recommended the 6D to those who shoot sports or a lot of action.  They need a more robust AF.  If they are a less deliberate shooter or prefer to use zones/auto AF the 6D may not serve them as well either because its AF points are not spread out super wide and there aren't that many of them.

Excellent advice as always, Dustin. Have you, by chance, used any fast primes like the 85 f/1.2 or 35 f/1.4 with either of your 6D bodies? I had the 6D for a limited time and found the outer points regularly inconsistent with such a shallow DOF, which is one of the main reasons I reverted back to the 5D3 (aside from dual card slots). What are your overall thoughts on using fast glass with the 6D, as you obviously know how to use it well - your images speak for themselves!

My fastest lens is currently only f/1.8.  I have the new 35mm f/2 IS, 85mm f/1.8, 100L, and 135L primes.  None of them are as wide as f/1.4, and certainly not f/1.2.  I have owned and shot the 50mm f/1.4 but, frankly, it never did too much for me, and I ended up moving both copies I have owned within six months of ownership.  That being said, it wasn't because I had focus issues. 

I recognize from others that lenses like the 85L and the 50L are more challenging to get consistent focus from, but that seems to be true on most bodies (particularly with the 50L).  I don't know what to tell you on that.

I can tell you that I have used both the 135L and several 70-200 f/2.8 variants without any issue on the 6D, and the depth of field is just as small (smaller @200mm f/2.8) than either of the other primes.  Those two just seem to be a little more finicky, and yet produce stunning results when they are on.

Proper AFMA is a big deal, and sometimes you don't get it right the first time.  This becomes increasingly important the wider the aperture is.  Technique is also a big part.  I shoot events with a 6D/135L combo all the time (and sometimes with a 1.4x II on the 135L) and rarely miss focus.

I don't know what to tell for sure as I don't have experience with either of the lenses you are speaking of.  All I know is that both pros and amateurs were getting stunning results with those lenses mounted on 5DIIs, and I know from experience that the 6D's AF is actually better/more accurate than the 5DIIs.
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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #222 on: December 20, 2013, 06:23:46 PM »

bleephotography

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #223 on: December 20, 2013, 09:59:35 PM »
Used the 85II on a portrait session yesterday and was getting a pretty high percentage of slight misses on a relatively static subject. I did pretty well with the same lens on my 5D3. Since switching over, the 85II has been pulled out twice for any significant amount of shooting and both times have been tough with regard to getting a lot of misses.

I'm going to go out on a limb and assume you have done a proper AFMA with the lens.  I haven't used the 85II myself with a 6D or otherwise, but I don't have any issues with the 135L; I get consistent, repeatable results.  The 85II should be usable on a 6D; plenty of people were shooting with it on a 5DII, which I can attest had a slightly inferior AF system to the 6D.

AFMA'd with Reikan FoCal three consecutive times yielding the same result. Figured it was good enough. I surprisingly have had the same findings as you regarding the 135 on the 6D. Seems to be just fine. But for some reason, the 85II on both occasions has been somewhat unreliable compared to when it was paired with my 5d3. The other ones that have given me the most problems is the 24II and the 24-70II. The zoom wasn't unreliable as far as AF goes, just seemed to hunt noticeably more in and in decent light which was odd. Most the other stuff has been fine.

That is interesting.  I wonder if it due to the nature of the newer lenses being optimized for 1DX and 5III AF?  I'm actually very surprised at more hunting with the center point, which has (on paper) greater sensitivity to anything else Canon has.  I always use single point AF, myself, and in good light I don't have problems with any of my lenses on my 6Ds.  And that center point can lock onto just about anything in any light.

This was actually during shoots so I was using all the points without paying too much attention to how often it was the center. Just based on feel/memory though, I don't believe I use the center point much more often than the outer points when composing if at all. I have definitely noticed that the center point has caught focus with a few of my lenses in very low light situations where I think I might have had a little more trouble previously. However, I am finding that doesn't help me all that much as I compose very frequently outside of the center which is probably more of an exhibition of how weak those outer non center points really are.

This little discussion may be key to at least some of the varying opinions on the AF of the 6D.  I think it depends on one's shooting style.  I tend to be a little more deliberate in my approach, and, frankly, the 6D works for me. I can't remember the last time I let a camera automatically select the AF point.  I have had my most successful year commercially shooting 6D bodies exclusively.  I don't have any problems at weddings and events, myself, but I do know my gear pretty well.  IQ trumps all for me, and the 6D delivers as well or better than any other current Canon option.

But I have never recommended the 6D to those who shoot sports or a lot of action.  They need a more robust AF.  If they are a less deliberate shooter or prefer to use zones/auto AF the 6D may not serve them as well either because its AF points are not spread out super wide and there aren't that many of them.

Excellent advice as always, Dustin. Have you, by chance, used any fast primes like the 85 f/1.2 or 35 f/1.4 with either of your 6D bodies? I had the 6D for a limited time and found the outer points regularly inconsistent with such a shallow DOF, which is one of the main reasons I reverted back to the 5D3 (aside from dual card slots). What are your overall thoughts on using fast glass with the 6D, as you obviously know how to use it well - your images speak for themselves!

My fastest lens is currently only f/1.8.  I have the new 35mm f/2 IS, 85mm f/1.8, 100L, and 135L primes.  None of them are as wide as f/1.4, and certainly not f/1.2.  I have owned and shot the 50mm f/1.4 but, frankly, it never did too much for me, and I ended up moving both copies I have owned within six months of ownership.  That being said, it wasn't because I had focus issues. 

I recognize from others that lenses like the 85L and the 50L are more challenging to get consistent focus from, but that seems to be true on most bodies (particularly with the 50L).  I don't know what to tell you on that.

I can tell you that I have used both the 135L and several 70-200 f/2.8 variants without any issue on the 6D, and the depth of field is just as small (smaller @200mm f/2.8) than either of the other primes.  Those two just seem to be a little more finicky, and yet produce stunning results when they are on.

Proper AFMA is a big deal, and sometimes you don't get it right the first time.  This becomes increasingly important the wider the aperture is.  Technique is also a big part.  I shoot events with a 6D/135L combo all the time (and sometimes with a 1.4x II on the 135L) and rarely miss focus.

I don't know what to tell for sure as I don't have experience with either of the lenses you are speaking of.  All I know is that both pros and amateurs were getting stunning results with those lenses mounted on 5DIIs, and I know from experience that the 6D's AF is actually better/more accurate than the 5DIIs.

Good to know, thanks Dustin. I'm trying to talk myself out of getting a backup/travel body, but I think I might just get a 6D instead of another 5D3. Maybe I'll give it another shot.
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bholliman

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #224 on: December 20, 2013, 10:12:30 PM »


AFMA'd with Reikan FoCal three consecutive times yielding the same result. Figured it was good enough. I surprisingly have had the same findings as you regarding the 135 on the 6D. Seems to be just fine. But for some reason, the 85II on both occasions has been somewhat unreliable compared to when it was paired with my 5d3. The other ones that have given me the most problems is the 24II and the 24-70II. The zoom wasn't unreliable as far as AF goes, just seemed to hunt noticeably more in and in decent light which was odd. Most the other stuff has been fine.

The AF on my 24-70 2.8 II works great with my 6D, fast and accurate!  I also have good luck with my 135L, 100L and 85 1.8 at wide apertures.  My only lens that struggles to focus accurately at times is my 50 1.4, but that same lens didn't focus that well with my 7D or T2i either.
Bodies:  6D, EOS-M
EF Lenses: 35mm f/2.0 IS, 100mm f/2.8L IS Macro, 135mm f/2.0L, 16-35mm f/4L IS, 24-70mm f/2.8L II, 70-200mm f/2.8L IS II; EF-M Lenses: 22 f/2, 18-55
Speedlites: ST-E3-RT, 600EX-RT (x3)

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Re: The Unthinkable: Swapped out 5D3 for 6D
« Reply #224 on: December 20, 2013, 10:12:30 PM »