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03-01-2021, 05:38 PM   #16
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QuoteOriginally posted by pentax_amateur Quote
I used AF-S via the viewfinder, but I do like the idea of calibration. I will try to calibrate my lenses and repeat the test.
Being that the camera is on a tripod why not use live view? You sometimes can't calibrate a zoom to be correct at all focal lengths no matter what adjustment you use.

03-01-2021, 06:49 PM   #17
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QuoteOriginally posted by tibbitts Quote
Being that the camera is on a tripod why not use live view?.
Because I never used Live View ever in my life and feels like a very awkward experience.
03-02-2021, 08:44 AM   #18
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QuoteOriginally posted by pentax_amateur Quote
Because I never used Live View ever in my life and feels like a very awkward experience.
With still subjects like with a lens test on a tripod you have to flip the mirror up anyway before taking the photograph, and the subject is centered, so for me that covers the awkward aspects. For several of my lenses even after adjustment viewfinder AF doesn't give accurate focus at all focal lengths and distances. You can't adjust the body for different micro-focus settings at different focal lengths with a given lens so you're limited in how precisely you can tune it. Using CDAF traditionally still doesn't cover you for the lens focus shifting as it's stopped down, but I believe that mostly affects faster lenses than the ones you're testing now.
03-02-2021, 05:35 PM   #19
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QuoteOriginally posted by pentax_amateur Quote
Because I never used Live View ever in my life and feels like a very awkward experience.
It does at first. Tilting the screen up and then looking down can seen like using your grandparents' old Box Brownie. But it's really worth persisting. Focus peaking is just a great way to see where your focus plane is and what effect it has. The KP has two focus peaking modes - highlight edge and extract edge. See which you prefer.

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