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Forum: Pentax K-1 & K-1 II
02-28-2024, 03:36 PM
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I thought the rating on the split prism only related to the darkening effect - if the lens wide open is not at least f5.6 it will be dark (or f2.8 etc.) I didn't think it referenced the accuracy like the focal points in PDAF do.
---------- Post added 02-28-24 at 05:49 PM ----------
See page 11 - the last paragraph. Apparently there is a relationship - but there are methods to avoid reducing the baseline distance. The OptiBright KatzEye screen I think were using one of these methods.
http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf |
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Forum: Pentax K-1 & K-1 II
09-25-2023, 06:29 PM
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As I age I find autofocus much easier to love.
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Forum: Pentax K-1 & K-1 II
06-06-2022, 03:03 PM
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I would suggest Titebond Wood Glue - Type III I think is the one that is moisture resistant.
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Forum: Pentax K-1 & K-1 II
08-13-2021, 06:47 PM
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Forum: Pentax K-1 & K-1 II
10-14-2018, 07:44 PM
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Split prism goes dark with slower lenses.
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Forum: Pentax K-1 & K-1 II
11-20-2016, 01:58 PM
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Forum: Pentax K-1 & K-1 II
11-20-2016, 07:44 AM
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In theory thickness should only matter if the thickness caused the shim to partially compress reducing the distance to the screen. In practice, the calibration of the existing screen is so imprecise ( because that screen doesn't require high precision) that aftermarket screens often need adjustment to give the highly accurate focus desired. Again, in practice, the various screens behave different from theory and require minor adjustments to achieve critical focus even if the system was already setup for critical focus and all you did is swap one type of aftermarket screen for another.
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Forum: Pentax K-1 & K-1 II
11-19-2016, 07:53 AM
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I thought the k1 screen wasn't replaceable. Interesting.
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