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Loss of sharpness on Canon 100-400

Started May 4, 2020 | Discussions thread
Andy01 Veteran Member • Posts: 5,191
Re: Loss of sharpness on Canon 100-400

Cporosus1 wrote:

Hi everyone, sorry for the delay. Here are some photos of my settings. Also attached a recent snake closeup...it looks fine but its not tack sharp. Settings were- f/14, 1/640 sec., iso400, 100-400mm lens Does everything look right for wildlife?

I am not familiar with a 7D ii so I cannot comment of specific settings.

Was the snake moving a little or perfectly still (I would guess moving a little) ?

How far away was the snake from the camera (ie. the subject distance) ?

Were you in Servo AF ?

Were you using BBF (Back Button Focusing) ?

I seldom use spot AF point because I find that usually just the normal single AF point gives a better result.

At f14 you are not going to get the sharpest result from the lens as diffraction is becoming evident.

The white scales under the rear end of the head appear to be quite sharp, which makes me think that perhaps the snake moved a little between you locking AF (presumably on the eye ?) and the shot being taken ?

Colin

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