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Some help with my new 10-18mm IS STM please?

Started Dec 7, 2016 | Discussions thread
trulandphoto Senior Member • Posts: 1,019
Re: Some help with my new 10-18mm IS STM please?

bent christian wrote:

Looking at the two full-resolution photos, I can't find anything in focus. Absolutely nothing. The issue appears to be something other than than diffraction at f/11. Diffraction would be minimal at this aperture in a crop sensor.

Like I said, diffraction starts on this sensor at f/5.9 at normal focal lengths. super wide like this would be even larger aperture.

Some areas would still show focus.

"focus" and softness are different things but can be confused. Diffraction results in softness. At 10mm and f/11 on a crop sensor you could almost focus anywhere and the entire shot is "in focus."

The fact that you don't see anything "in focus" indicates it's not a focus issue.

 trulandphoto's gear list:trulandphoto's gear list
Canon EOS R Canon RF 35mm F1.8 IS STM Macro Canon RF 24-105mm F4L IS USM Canon RF 85mm F2 Macro IS STM Canon RF 50mm F1.8 STM +3 more
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