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Author Topic: 40D vs. 6D AF  (Read 8043 times)

Sporgon

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Re: 40D vs. 6D AF
« Reply #15 on: May 15, 2013, 02:06:54 AM »
I've had no issues with my 6D AF in real life.  On the internet, I've found that it can't even capture pyramids in focus, and forget about getting a clean shot of a bride walking down the aisle.


+1.  ;D

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Re: 40D vs. 6D AF
« Reply #15 on: May 15, 2013, 02:06:54 AM »

DaveQ

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Re: 40D vs. 6D AF
« Reply #16 on: May 15, 2013, 04:10:34 AM »
The centre AF point focus on the 6D is one of its strong points. I have 2x 6D bodies for my work, and have yet to have bad focus with any of my lenses, L or otherwise.

Jack Douglas

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Re: 40D vs. 6D AF
« Reply #17 on: May 15, 2013, 04:13:21 AM »
I just got my 6D plus 300 2.8 II and TC's back from Canon warranty.  They say well within specs and only loaded new firmware for the 300 (bought in Feb. but maybe older manufacture).  To sub for a month I bought a used 40D and played with my 24-70 F4 and the 70-300 non L.  Yesterday was my first shots with the 6D after one month away and boy let me tell you I was shocked at the difference since I'd gotten used to the 40D (still a nice camera).

So here's a couple photos taken after sunset in pretty low light - ISO 12500 and focus was extremely fast and all things considered it's still a decent photo that I could never get with the 40D (300 with 2X III).  Low light as others have said is super!  Four males were fighting over one female!

After all my fussing I'd still buy the 6D and I'll be looking to add a 7D II if and when.

Jack
6D  24-70 F4  70-200 F2.8 II  300 F2.8 II  1.4X III  2X III

jdflute

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Re: 40D vs. 6D AF
« Reply #18 on: May 15, 2013, 04:41:41 AM »
I have had a 40D for years now and it has been a lovely camera. Like you I take shots of varying subjects, but the thing that has let me down is low light performance and image quality when trying to shoot my son's evening hockey matches.  In all honesty I have been waiting for the 7D Mark II to come out in the hope that this would address the issue, but given that this doesn't appear to be happening until 2014 I am tired of waiting and so will be upgrading at the end of this month.
I looked at both the 6D and 5D Mark III and have chosen quality over cost for a couple of reasons which I think will be important for your consideration.
Firstly the 40D has a great auto focus with 9 cross points, (the existing 7D has 19), the 5D has 41 and the 6D only 1. I have had a fair few times where the cross type focus hasn't been sufficient in the 40D and I have had to re-frame a shot, focus lock and then reframe. The thought of only 1 cross point becomes a real issue especially in sports.
The other killer is fps, the 40D has 6.5fps, the 5D 6fps and the 6D 4.5fps not an awful lot of difference I know but enough to cause annoyance when trying to shoot sports or wildlife.
I wanted my next camera to be more than an incremental upgrade, hence I have waited so long before making the leap. The existing 7D isn't enough and the 6D is a downgrade (in part) for the reasons above. That has left me with the 5D Mark III, which in every which way you look is a pretty amazing upgrade (but at a cost).
Ps. I am looking forward to messing around with Magic Lantern once they issue a RC for the 5D.

I should also note that I don't intend to upgrade for a long time after this, but I suspect that I would be tempted to if I chose the 6D

Jd
« Last Edit: May 15, 2013, 05:35:39 AM by jdflute »

mariusx1

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Re: 40D vs. 6D AF
« Reply #19 on: May 15, 2013, 12:30:09 PM »
...I looked at both the 6D and 5D Mark III and have chosen quality over cost for a couple of reasons which I think will be important for your consideration...
...The existing 7D isn't enough and the 6D is a downgrade (in part) for the reasons above. That has left me with the 5D Mark III, which in every which way you look is a pretty amazing upgrade (but at a cost)...

Jd

You make some good points JD, and trust me, I've gone back and forth MANY times over the past 8 months. Since I'm living in South America right now, I've needed to wait till I return to the U.S. to pull the trigger. If I were still stateside, I would've made a decision long ago! =)

But I agree - compared to the 40D, the 6D is a downgrade in the two key areas that you mentioned (FPS & AF). And that had me hung up for a while. I feel like I can live with the slightly lower FPS - 4.5 vs. 6 is close enough for my purposes. But AF has been the sticking point for me, hence my original question. If it's similar to or better than the 40D, then that would be ok with me. I know on paper, it's not...except for the -3EV center point, but it sounds like it does pretty well in real life.

To be honest though, the other major sticking point for me is price. In nearly every way that counts, the 5DIII is the better camera, but I've been increasingly frustrated with Canon's pricing structure. As of right now, the 5DIII kit is $4099 at B&H. The 6D kit is $2599. If the difference were $500, it's a no-brainer, I'd be getting the 5DIII. If the difference were $1000, I'd be on the fence, but might still end up justifying the 5DIII. But a $1500 difference?!? It's not THAT much better. I can get a new L lens, a grip and other accessories for the price difference and I'm starting to believe those items will have more of an impact on my photography than the extra features of the 5DIII. Everyone has different priorities though...

I should also note that I don't intend to upgrade for a long time after this, but I suspect that I would be tempted to if I chose the 6D.

Even with all my reasoning so far, this one still gives me pause. I will likely outgrow the 6D faster than the 5DIII. And, I can see the 5DIII holding it's value better than the 6D. So, does that make it worth the extra cash? Not sure.
6D | 40D | S100 | 17-40 f4L | 24-105 f4L IS | 70-300 f4-5.6 IS | 40 f2.8 | 85 f1.8 | 430EX II

Jack Douglas

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Re: 40D vs. 6D AF
« Reply #20 on: May 15, 2013, 01:06:47 PM »
Couldn't disagree more.  It is a joke to compare the 40D to the 6D.  And to emphasize a half frame per second is not good logic.  A camera will obsolete in short order and the money saved can go to better glass which does not depreciate significantly.  The 6D got a lot of bad press, but when I looked at buying I read what actual owners wrote and it was clear they and now we were very pleased.  It is a pleasure to operate and the AF is not anywhere close to what non-owners critical comments suggest.  The software has improved AF significantly.  That's not to say there aren't any negatives in the realm of the number and type of crosspoints but it's nothing close to as bad as many claim.  Face recognition is very good too.  And WiFi is great for remote tripod shooting.

My 6D will become a wonderful second body for what it does spectacularly and in due course a more suitable wildlife body will serve that role.  There was some uncertainty at the time of purchase and I figured better a smaller dollar mistake than a $1000 more if I end up selling and to me that's sensible.  The 5D3 is a great camera but in my opinion not worth the extra dollars unless its few stronger features are game breakers for you.

Jack
6D  24-70 F4  70-200 F2.8 II  300 F2.8 II  1.4X III  2X III

mariusx1

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Re: 40D vs. 6D AF
« Reply #21 on: May 15, 2013, 04:37:28 PM »
The 6D definitely got some bad press, but like you, the more I look into the details and actual user reviews, the better it sounds. It'll definitely be nice to have an extra $1500 to spend on other items to improve my kit.

Does the 6D have face recognition? Never heard about that...

[edit]
On rereading your post, I realize you're not referring to face recognition as in the auto face detect found in some P&S cameras, but rather the effectiveness of the 6D's AF at recognizing faces.
« Last Edit: May 15, 2013, 06:18:46 PM by mariusx1 »
6D | 40D | S100 | 17-40 f4L | 24-105 f4L IS | 70-300 f4-5.6 IS | 40 f2.8 | 85 f1.8 | 430EX II

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Re: 40D vs. 6D AF
« Reply #21 on: May 15, 2013, 04:37:28 PM »

jblake

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Re: 40D vs. 6D AF
« Reply #22 on: May 15, 2013, 07:16:29 PM »
   I just sold my 6D and purchased the 5D3. The 6D is an awesome camera if you understand it's limitations; the outer AF points.
   If you are fine with using the center AF point or do a lot of manual focusing, then you will be a happy camper. Yes it does in fact have the best center AF point that I have ever experienced, it would acquire focus in low light better and more reliably than my 1D3 and even my 5D3. I have shot a couple of high school girls basketball games and the first several girls high school soccer games with the 6D and I was very impressed with the center AF accuracy.
   It is just those outer AF points that leave a lot to be desired. Hit rate at those high school games with outer AF was less than 40%. Using those outer points to quickly acquire focus is very frustrating. The T4i and T5i have superior outer AF points when compared to the 6D, they are all 5.6 cross-points sensors. I have used the T4i in my home and those outer AF points would quickly acquire focus where my 6D would not.
   If canon had just gave the 6D the same or similar outer cross-point sensors like what the T4i/T5i has, I would have kept the 6D. Good luck with your decision.
     

jdflute

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Re: 40D vs. 6D AF
« Reply #23 on: May 16, 2013, 12:47:49 AM »
Jblake captures the point succinctly, I rarely centre focus, and having a very active six year old as well as an interest in sports the 6D autofocus is just not for me. Oh and Jack, I wasn't emphasizing the loss of half a frame per second, I was talking off the loss of 2 frames per second between the 40D (6.5) and the 6D (4.5) that's a major step backwards for me.

The other thing that I love about  the 40D is the joystick on the back which I use constantly for controlling my AF points, I would be lost without it. It amazes me that Canon dropped this from both the 60 and 6D's because it is perfectly positioned and means that I don't have to take my eye off the shot to change my AF points. I am sure there will be other ways to achieve that, but I do believe in the school of thought that says, if it ain't broke don't fix it!

Jd

Jack Douglas

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Re: 40D vs. 6D AF
« Reply #24 on: May 16, 2013, 01:46:47 AM »
On face recognition - I had the 6D sitting on a bench as I played with the Wifi and there is absolutely no doubt it recognizes and refocuses on a face.  I was moving my head all around and watching the camera's behavior on my computer monitor.

These camera discussions always represent opinions that are personal and I wouldn't push a 6D over a 5D3 unless money was an issue.  However, I really wanted WiFi for remote shooting and the 5D3 didn't have it, so that finally made the difference for me.  I was very apprehensive about the AF and decided that I was OK with recomposing at least until the next "has it all" crop camera hits the shelves.  Getting the 24-70 F4, and the 300 F2.8 with both extenders was a killer on the pocket book!  Also I didn't like the extra size and weight of the 5D3.

Todays shot 6D 300 2.8 II 2X III 1000th F5.6 ISO 1600 late evening

Jack
6D  24-70 F4  70-200 F2.8 II  300 F2.8 II  1.4X III  2X III

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Re: 40D vs. 6D AF
« Reply #24 on: May 16, 2013, 01:46:47 AM »