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FORUMS Photo Sharing & Visual Enjoyment Sports 
Thread started 21 Oct 2012 (Sunday) 18:03
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still not happy with the results

 
joeblack2022
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Oct 29, 2012 12:34 |  #31

elrey2375 wrote in post #15182213 (external link)
Try it without the IS on, this could be causing you a problem. You never want it on when shooting sports.

Worth trying this, from the photos it doesn't look like anything is in focus.


Joel

  
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Ltdave
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Oct 29, 2012 17:25 |  #32

so i was interested in some of my stuff from last year so i pulled them up...

here is one that i think turned out nicely regarding focus and noise...

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this is a jpeg only image (no RAW) and tweaked just a little bit with DPP...

it was shot with the 70-200 f2.8L IS USM with the following
M
f2.8
1/500
1600 ISO
120mm
AI Servo
Center Weighted Averaged

the difference between this image and the others ive posted? it was shot with my 550D Rebel T2i...

since my 17-55 f2.8 shoots beautiful pictures with my 7D, there would appear to be a compatibility issue between the 70-200 and 7D...

what can be done to get these to play nice together?



  
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John ­ Godwin
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Oct 29, 2012 19:10 |  #33

Ltdave wrote in post #15183810 (external link)
so i was interested in some of my stuff from last year so i pulled them up...
appear to be a compatibility issue between the 70-200 and 7D...
what can be done to get these to play nice together?

Micro Focus Adjustment is a good place to start. Know that while all Micro Adjustment methods should produce similar results if you are not very careful in following the procedures the results can and will be all over the place. If you cannot get the results you are looking for using Micro Focus Adjustment then it is time to send the rig in to a repair shop so that a calibration/repair can be done.

You will get a lot of good and some debatable advice on improving your technique for shooting action photos but know that all of those techniques will not produce a sharp photo if the camera cannot produce one using Single Shot mode at a stationary object. Once you know that the rig can produce an in focus photo then you can move on to improving your technique and setting up the custom functions.


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Ltdave
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Oct 30, 2012 18:41 as a reply to  @ John Godwin's post |  #34

all shot with the 70-200 f2.8L IS USM on either the 550d or the 7d...

they have all been cropped significantly in order to get a good impression of the details...

the red banner was shot at ISO 800, f2.8 and at 200mm on Av

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550d

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7d

the goalie helmet was shot at ISO 1600, f2.8, 1/640 and at 200mm on M they have been cropped even more tightly than the red banner. there MIGHT be a little bit of camera movement on the 7d but the goalie was pretty stationary and the shutter speed is definitely high enough to prevent much blur...

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550d

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7d



  
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ajaffe
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Oct 30, 2012 22:29 |  #35

Do a more standardized comparison like people have asked. Shoot a stationary object with your camera and lens combo on a tripod with different focus modes. If you cannot obtain sharp focus then, then you know it is one of those items causing an error.


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Ltdave
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Oct 30, 2012 22:44 |  #36

ajaffe wrote in post #15189055 (external link)
Do a more standardized comparison like people have asked. Shoot a stationary object with your camera and lens combo on a tripod with different focus modes. If you cannot obtain sharp focus then, then you know it is one of those items causing an error.

thats what the red banner in my previous post represents. i shot at the indicated zoom settings (70, 110, 135 and 200) for the major f stops (2.8, 4.0, 5.6, 8.0) with both bodies but since that resulted in 32 different files, i just posted the two that are most representative of that series...

ive done the same thing with 4 objects of different distances in the immediate neighborhood. i didnt compare these with shots made with the rebel body but of the ones i shot during a hockey practice definitely show the difference...

i dont know now if its the lens on the 7d or if its just the 7d on its own...




  
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joeblack2022
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Oct 30, 2012 23:22 |  #37

Did you test with IS on and off?


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ajaffe
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Oct 31, 2012 00:44 |  #38

You didn't show anything since you still have the most unstable variable involved, unless you used a tripod, did you?


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Ltdave
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Oct 31, 2012 04:17 |  #39

ajaffe wrote in post #15189374 (external link)
You didn't show anything since you still have the most unstable variable involved, unless you used a tripod, did you?

oppps. sorry thought i mentioned that the banner was with a tripod and the IS off...

the shutter speed on the banners were/was 1/200th...

If you cannot obtain sharp focus then, then you know it is one of those items causing an error.

um, thats what ive been saying all along. ive got enough time behind the camera to understand all about shooting good pictures, but the issue has been out of focus images with my 70-200 since getting my 7d. some are in better focus than others and i thought it was my lens. now evidence is point towards the body...




  
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ajaffe
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Oct 31, 2012 08:59 |  #40

Fair enough, now just set up a better experiment with something stationary in a rather open space so that you can tell if you are front focusing, back focusing, or something worse.


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still not happy with the results
FORUMS Photo Sharing & Visual Enjoyment Sports 
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