7D Owners - Try a Focus Test

Started Nov 9, 2009 | Discussions thread
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7D Owners - Try a Focus Test
Nov 9, 2009

I find the 7D can offer incredible detail when sharp focus is obtained.
After testing the focus seems inconsistent compared to my 5D.

Here's the test:

1) Place the 7D on a tripod with 2 sec timer drive, Mirror Lockup enabled,
One Shot AF center spot
use a sharp lens with a wide aperture. (135 f/2)

2) Tape a currency bill to a wall and have the bill fill > 60% of the frame.

3) Before each shot set the camera so its out of focus alternating to the left and right .

4) Shoot Large Jpeg sharpness 3, AV, shutter speed 1/500, ISO as needed.

Think I was giving the 7d every chance to focus and obtain a sharp image.

Results 8 shots taken (135 f/2) :
With my 7D... accurate=2, acceptable=2, oof=4
With my 5D... accurate=8/8 very little if any change from shot to shot

Please try a similar test and post results with different cameras too if possible.
Or if you have suggestions to improve the test that's great too.

Be interesting to hear results from others,
also before / after results from those who have sent one in for adjustment.

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