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05-05-2019, 03:00 PM   #31
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QuoteOriginally posted by stevebrot Quote
That is not how it works.
Thanks Steve. So AF/FA will work to correct AF lenses and also the green hexagon focus confirmation (useful with manual focus lenses) but wont do anything for a misaligned focus screen which is the case here.

Thanks for clarifying that. I was not sure.

05-07-2019, 04:00 AM   #32
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QuoteOriginally posted by pschlute Quote
Thanks Steve. So AF/FA will work to correct AF lenses and also the green hexagon focus confirmation (useful with manual focus lenses) but wont do anything for a misaligned focus screen which is the case here.

Thanks for clarifying that. I was not sure.
and here's another point - the lens calibration function in the camera corrects for errors in the lenses, not in the relationship of the focusing screen to the prism and mirror.
05-21-2019, 07:02 AM   #33
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Further to focusing screens, I found an older post of a user who took one out of a Pentax ME Super and filed it down to size. Is that a good idea? I see a Split Matte screen on offer from Japan at £325 so how can such a price be justified?
05-24-2019, 03:29 PM - 1 Like   #34
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QuoteOriginally posted by dlh Quote
and here's another point - the lens calibration function in the camera corrects for errors in the lenses
That is only partly correct. AF errors can be caused by the lens, or by the AF sensor being out of perfect alignment, or both.

05-25-2019, 04:26 PM   #35
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Ultra high prices usually mean that they don't have the item in stock.

As for cutting down a screen, you can fo it, but they are pretty easy to damage as the plastic they are made from is optical quality and is easy to scratch - you don't have to stick to pentax if you want to cut down a screen, I cut an old nikon screen down to fit one of my canon film cameras, the thing there is I'm kinda handy with tools, and I got the nikon screen for about $5.

Looking on Ebay I'm seeing k10d focus screens pretty cheap with free postage from asia, I'd probably look at those.
05-29-2019, 02:10 AM   #36
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i just bought this as replacement the old one for my K70, not sure if it make any improvement??

05-29-2019, 05:43 AM   #37
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QuoteOriginally posted by KoolKool Quote
i just bought this as replacement the old one for my K70, not sure if it make any improvement??
That looks like an autofocus screen, and doesn't appear to have the microprisms being discussed here. Is that what you're going for?
05-29-2019, 09:39 AM   #38
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QuoteOriginally posted by stevebrot Quote
The only metering problems I have had were with spot-metering. As might be expected, the center split does throw things off when using the spot meter mode. Other than that, things are good and comparable to the stock screen.


Steve
Are the metering errors consistent, so you can correct with exposure compensation, or are they 'all over the place'?

Edit: Forget it! I found the answer in later posts. :-)


Last edited by deus ursus; 05-29-2019 at 11:38 AM.
05-31-2019, 10:31 AM - 1 Like   #39
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QuoteOriginally posted by deus ursus Quote
Are the metering errors consistent, so you can correct with exposure compensation, or are they 'all over the place'?

Edit: Forget it! I found the answer in later posts. :-)
As you discovered...totally off the wall...one can't meter off the middle of the "split".


Steve
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