Sony 24-105 f4 soft right corners?

Started Jul 26, 2018 | Discussions thread
JimKasson
JimKasson Forum Pro • Posts: 25,109
Re: An offer

mohxinn wrote:

JimKasson wrote:

If you run this test three times:

https://blog.kasson.com/lens-screening-testing/

and send me three sets of the raw files -- 27 images in all -- I'll analyze them and report back to you.

Here's what a good copy of that lens looks like at 24 mm:

https://blog.kasson.com/lens-screening-testing/examples/good-zoom-at-24-mm/

I will try to do this over the weekend. Just confirming my understanding. My camera is Sony A7 III which 24 MP FF camera. I plan to test at 24mm and F5.6 that way, if I understood correctly from the info on the link you sent, I can have a shorter distance to target and a smaller test target.

Yes, stopping down shortens the distance

Based on above info can I print on an A3 paper?

That should work.

Everytime should use the same FL and aperture, right?

Yes. Focus once, make 9 shots. Refocus, and do it again. Refocus a final time and make the last 9 shots.

Jim

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