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Sharpness

No.4227479 View ViewReplyOriginalReport
Started with photography 2 months ago and would like to know what is sharpness?
When is a picture considered sharp?
Are these pictures sharp?

They are all from 32MP DSLR Canon90D (crop sensor) with a 50mm lens which is considered one of the sharpest affordable lenses based on:
https://photographylife.com/reviews/sigma-50mm-f1-4-dg-hsm-art
https://www.dxomark.com/sigma-50mm-f1-4-dg-hsm-a-canon-lens-review-art-for-art-s-sake/
The tests were done with a fullframe.

Would you mind posting some of you sharp images as comparison with similar lighting, aperture, shutterspeed and iso?
Please also post 100%, 200%, 400%.