Images at f/2-f/2.5 less sharper than at f/1.4-1.8

Started 11 months ago | Discussions thread
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SpacemanUA
SpacemanUA Contributing Member • Posts: 600
Images at f/2-f/2.5 less sharper than at f/1.4-1.8
1

Hello everyone.

I've faced some strange issue. I take test images (just basic stree t view) with different aperture values and get some strange results. I tested XF 35/1.4 and Touit 1.8/32 with similar results. So, images with wide open aperture (1.4 or 1.8) are much more sharper, especially on the edges than at f/2-2.5. At f/2.8 and further it becomes better. It's obviously not a user error, cause I tested it with two lenses and various conditions and got similar results. It obviously can't be optics cause I have no explanation on why can lens be softer at smaller AV

Does anyone has any thoughts about it?

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Sony a6300 Sigma 30mm F1.4 for Sony E Sigma 16mm F1.4 DC DN (Sony)
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