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Author Topic: microadjustment advise?  (Read 5118 times)

dawgfanjeff

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Re: microadjustment advise?
« Reply #15 on: June 13, 2012, 12:30:27 PM »
I spent a good hour and a half going through the afma process on my 24-105L that I can never seem to get a great  image from.  Took 20 shots -10 - +10, went through each at 400% looking for a artifact in my test grid.  Result: 0 was optimal.  :'(

I am going to borrow a buddy's 24-105 run same test and see if I have the proverbial bad copy, or needs repair.  I really don't believe that happens very often, but I can't ignore that at same 100mm at f8, my 70-200L f/4 IS is drastically better.  Not even close.  In fact, even wide open the 70-200 is "clearly" better (pun intended) than the 24-105 at any aperture.

7D, btw.

Hint: AFMA is much easier if you have a willing assistant to scribble the adjustment you're trying on piece of paper and holding it in the shot.
5DIII, | 100 2.8 Macro | 24-105L | 16-35 f/4L
70-200 f/4L IS | 50 1.4 | 10-22 (for sale!)

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Re: microadjustment advise?
« Reply #15 on: June 13, 2012, 12:30:27 PM »

Astro

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Re: microadjustment advise?
« Reply #16 on: June 13, 2012, 01:10:18 PM »

Quote from: Astro
well microadjustment is only really usefull for prime lenses... just as a reminder

Not true at all.  The AFMA works just fine with zoom lenses.  You just calibrate it at max zoom, which is where your DOF will be the narrowest.  It wont matter if it is off a little at MIN Zoom because at shorter focal lengths the DOF is so much larger that it will be a non issue.    Also, the 5DIII allows you to AFMA for both ends of a zoom lens.

well if you call that working then it might be so.
i call it pretty useless if you adjust for just one end of the focal length....   :o

if you say DOF is deep enough on the shorter end, then i say for zooms with narrower apertures, such as the usuall f/3.5-5.6 range, it should be a lesser problem anyway.
the narrow aperture will kind of mask that error.

fast primes are what microadjustment is most usefull for.

with "only really usefull" i did not want to say it can´t be usefull in some cases for zooms.
if a zoom has an fixed offset over the whole zoom range it can work just as well as for a prime lens.

Quote from: AF Adjustment notes from Canon
If you are attempting to set microadjustments for a zoom lens, it is important to realize that the camera's setting may only be accurate for the focal length setting you test. The instruction book suggests testing at the longest focal length of the lens, but you may find it more efficient to choose the focal length you use most often.

it´s something different with the MK3 when it allows to adjust both ends of a zoom lens.
that was new to me. i thought only the 1D X has that feature.
 
« Last Edit: June 13, 2012, 01:43:56 PM by Astro »

avatar13

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Re: microadjustment advise?
« Reply #17 on: June 13, 2012, 03:03:24 PM »
I too am curious about this FoCal software.  I looked it up and the price seems reasonable, just wondering what the differences are, I am leaning towards the Plus version however it seems that with the 5D Mark III the adjustment still must be manually set, just wondering if that means it works like it does in with FoCal standard.

SteenerMe

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Re: microadjustment advise?
« Reply #18 on: June 13, 2012, 04:31:26 PM »
Downloading FoCal 1.4 now, pro version. Will post results after i go through all my lenses.
5DIII, 7D, 8-15L, 16-35L II, 24-70L II, 70-200 2.8 IS II, 50L, 100L

bkorcel

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Re: microadjustment advise?
« Reply #19 on: June 13, 2012, 04:45:35 PM »
AFMA will work with all of the versions.  The more expensive versions add additional capability.  Right now the 5DMIII needs to be used in semi-auto mode.  That is you have to manually make the AFMA adustment on the camera but the SW will still do the rest automatically.  That's only an issue with the 5DIII because they have not made that API public yet so there is no way to program it.  They are working on it though and once it's known or figured out, fully automatic AFMA will be implemented.

With the 7D and 1Dx models it is fully automatic.  You just sit back and have a beer while the software "tunes" your camera.

JEAraman

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Re: microadjustment advise?
« Reply #20 on: June 13, 2012, 04:47:36 PM »
Downloading FoCal 1.4 now, pro version. Will post results after i go through all my lenses.

Keep us posted on how it goes.. :)

bryanwolfmd

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Re: microadjustment advise?
« Reply #21 on: June 13, 2012, 04:48:29 PM »
I am shooting the 5D3 and get sharp shots most of the time but only get sick, tack unreal sharp shots say 1 of 50 if not more. Is this a need to microadjust?

I completely understand what you're talking about.  I've been meaning to microadjust for this very reason.  I do suspect a lot of my troubles are related to shooting at long shutter speeds.  But I have a 5D3 and 70-200 2.8II, and rarely do I get a picture that I believe competes with magazine quality sharpness.  I also suspect other photogs do much more post processing including sharpening than I do.  I've only recently gotten involved in that practice, and I don't see heavily investing myself in that sort of activity any time soon.  Anyways, let us know what happens with FoCal.  I haven't wanted to spend the money, but microadjusting without a program seems like quite a chore. 

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Re: microadjustment advise?
« Reply #21 on: June 13, 2012, 04:48:29 PM »

JEAraman

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Re: microadjustment advise?
« Reply #22 on: June 13, 2012, 05:03:10 PM »
I am shooting the 5D3 and get sharp shots most of the time but only get sick, tack unreal sharp shots say 1 of 50 if not more. Is this a need to microadjust?

 but microadjusting without a program seems like quite a chore.

I've used the LensAlign MkII. I was pretty pleased with the results, however, it wasn't as easy to setup. I wanna see what others have to say about the FoCal Pro.. If it's as easy as everyone claims.. I'll probably get it once the 1DX is supported.

canon816

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Re: microadjustment advise?
« Reply #23 on: June 13, 2012, 05:54:11 PM »
Does the FoCal software tell you what parameters to put in the camera once its tests are complete?

Yep.  The software will tell you the optimal MA point.  Its really quite easy.  I just used the software with a friend on his 5DIII and even though the test was not fully automatic and you needed to adjust the MA manually before each test shot it was still very easy and the final test results are just as accurate.

All versions of FoCal will find the correct MA.  The Pro one will give you more IQ data on how it arrives at the optimal AFMA.  And you will have nifty charts like the one below:

Canon 1DIV+600mm Lens (NON IS) Mounted on WH200 + Gitzo Systematic Caron Tripod

canon816

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Re: microadjustment advise?
« Reply #24 on: June 13, 2012, 06:03:25 PM »
well if you call that working then it might be so.
i call it pretty useless if you adjust for just one end of the focal length....   :o

Great.  If you think it is useless then I certainly don't recommend getting it for yourself.

I have a 70-200 f4, 24-105, 17-40 zoom lenses and focal has worked like a charm for me on my 1DIV and 5DII. 

If you are like me (which I am not saying you are) I tend to shoot at the max end of my focal length on my tele zooms.  Because I shoot here 90% of the time then it makes sense to calibrate my lens for the longer focal length.  If you are a shooter who uses the short end of the focal length often you could just calibrate it for the short end using FoCal, remember the MA setting, and change it manually when you are going to shoot at that shorter focal distance. 

I have the MA adjustment menu on my custom functions menu on my camera so I can easily adjust the MA on the fly.  FoCal will help you determine the optimal MA setting for any focal lenght and you can simply change it as needed if you are using using a specific range on your zoom lens.

Also, at very short focal lengths, unless you are shooting really really close to your subject.... the wide depth of field renders the MA argument moot.    If you are shooting at subjects very close to the minimum focusing distance then it is VERY important that the optimal MA setting be accurate at that short focal length.

Every shooter uses their gear differently and for me, FoCal has been priceless.  We have only begun to scratch the surface of the uses of this software in this thread.  I have done testing to compare WH200 setups to sidekicks, hand placement locations to mitigate vibration,  etc....

Just make sure you shoot in a controlled environment with a consistent light source.  I shoot indoors with two 500 watt floodlights on my target.  The literature with the software explains all of this very clearly.


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Re: microadjustment advise?
« Reply #24 on: June 13, 2012, 06:03:25 PM »