Please Help Me Tweak My 7D to Improve Image Quality

Started Mar 10, 2013 | Discussions thread
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Zee Char Forum Pro • Posts: 10,513
Re: Please Help Me Tweak My 7D to Improve Image Quality

Bangers and Mash wrote:

I have been racking my brain trying to figure out what was wrong and couldn't see it until I read your post. Of course . . . the lenses is open too much. During a photography course that I took, it was pointed out that one should strive to use an f/stop somewhere in the middle of the range of the lens. I believe they referred to it as a "sweet spot". A rule of thumb perhaps, as each lens would most likely be different.

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"The best camera of tomorrow can't shoot a picture today".

Not really. You need to look at the MTF (resolution) charts to find your lenses sweet spot.

Here the OP's 200 shows 5.6. Rare as most are one stop past wide open

http://www.photozone.de/canon_eos_ff/580-canon_200_28_ff?start=1

Here is my 70-200. Different at 3 focal lengths but always never more than one stop from wide open.

http://www.photozone.de/canon_eos_ff/431-canon_70200_4is_5d?start=1

 Zee Char's gear list:Zee Char's gear list
Canon EOS 7D Mark II Canon EF 300mm f/4.0L IS USM Canon EF 70-200mm f/2.8L IS II USM Canon Extender EF 1.4x III Sigma 2x EX DG Tele Converter +3 more
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