Jim Kasson

Jim Kasson

Carmel Valley, California

https://blog.kasson.com/about-2/who-am-i/

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  • Jim Kasson
    Jim Kasson
    Silver Member
    Posts: 77
    Creating a high MP image
    on: April 6, 2023 at 3:40 pm

    I’ve used both for the same subject. Pixel shift is better for most subjects, if your subject and camera are locked down solid. I think that Super Resolution must have been trained in part with a Siemens Star, because it does pretty darned well with that as a target.

    Jim Kasson
    Jim Kasson
    Silver Member
    Posts: 77
    Re: Can a lens be repaired for sharpness
    Reply #1 on: March 25, 2023 at 9:42 pm

    Maybe you could post some images. The 24-105mm is a surprisingly good lens and used by a lot of Sony shooters. I have both the 24-70 GM and the 24-105. I had done some testes a year or so ago and it was hard to tell them apart.

    Vignetting is quite different between those lenses. If you turn off the raw developer vignetting correction you’ll see what I mean.

    Jim Kasson
    Jim Kasson
    Silver Member
    Posts: 77
    Re: DPReview Refugee thread….
    Reply #2 on: March 25, 2023 at 7:17 pm

    Sometimes diffraction is a good thing. It can be an effective way to eliminate visible aliasing. In addition, diffraction blur in small amounts responds well to deconvolution sharpening. Greg, I wouldn’t think twice about using f/11 in this situation.

    Blur management is about trading off motion blur, defocus blur, lens aberration blur, and diffraction blur. One size doesn’t fit all.

    Jim

    Jim Kasson
    Jim Kasson
    Silver Member
    Posts: 77
    Re: Can a lens be repaired for sharpness
    Reply #3 on: March 24, 2023 at 9:28 pm

    If lack of sharpness is because of the design of the lens, no. If lack of sharpness is due to improper construction, yes, sometimes.

    Jim Kasson
    Jim Kasson
    Silver Member
    Posts: 77
    Re: Digital Dynamic Range
    Reply #4 on: March 24, 2023 at 9:24 pm