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Old Jul 27, 2016, 11:32 AM   #1
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Default 5d mark 111 focus issues

Recently purchased a 5d mark 111 and found it's not as sharp as my 6d . Most of the shots are soft. Am I missing something or is there an adjustment I need to make. I'm using the same lenses. Thanks
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Old Jul 27, 2016, 1:48 PM   #2
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You may need to explore AF Microadjustment.
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Old Nov 28, 2016, 11:45 AM   #3
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Default TCav is probably right.

I am sure there's an official way to do the micro-adjustment test, but here's what I did and it helped a lot.

On a 6 foot long table. I put my camera on one end and a yard stick on the other end. The yard stick was angled at a 45 degree angle to the camera. I focused the center focal point of the camera on the 8 of the 18 in marker and took a photo. Then viewed that photo on my computer (not on the camera).

If any number closer to the camera was sharper than the 8, a microadjustment was needed. If any number further away from the camera was sharper than the 8, a micro adjustment was needed.

Last, you'll want to do this with EVERY lens. The MarkIII remember the micro adjustment for each lens and makes the adjustments automatically.

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Old Nov 28, 2016, 4:39 PM   #4
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thanks
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Old Dec 2, 2016, 8:03 AM   #5
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I will add this for microadjust. What I would do is similar to the old eye test. I take shot at 0, +5, -5 and then download. Compare the 3 and see which is better. Here's the key though - between each shot, manually de-focus the lens so that the camera goes through it's whole focus acquisition process again. Don't try to compare +1 to +2 then +3 etc. Start at big differences between shots and work in closer.

I'm a little less scientific - I use a teddy bear or similar and focus on the eye - That's often what you're trying to focus on in real life anyway.
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