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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?

I'm going to guess it's diffraction. f/11 is not going to result in the sharpest images with a wide angle focal length and the small pixels of the T6s.

Diffraction starts setting in on this sensor at apertures smaller than 5.9 according to some charts I've seem.  You can go smaller apertures with longer focal lengths because diffrection is a function of actual aperture size and f/8 on a 300mm lens is much larger than on a 10mm lens.

 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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