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07-24-2017, 08:31 PM   #1
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Hi, I'm in Michigan. I have a Pentax 6x7 with mirror lockup. Great lenses I have but the prism view finder sedms so dark. Any solution?

07-24-2017, 10:08 PM   #2
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07-24-2017, 10:18 PM   #3
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Hi from Australia, and welcome to the Pentax forums. I have put a link to the Pentax Medium Format forum as you might get more answers if you post your question again there. Good luck, and good to have you here.


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07-24-2017, 11:04 PM - 1 Like   #4
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QuoteOriginally posted by castlefloors Quote
Hi, I'm in Michigan. I have a Pentax 6x7 with mirror lockup. Great lenses I have but the prism view finder sedms so dark. Any solution?

Invest in one of the f2.8 lenses for a brighter viewfinder there are several. Though not necessarily a DIY job, a Pentax 67ii focusing screen, with the surrounding fascia removed, can also be used; whether or not this introduces exposure errors is conjecture you would need to run a roll of slide film through the camera with such a modification and expose very carefully (taking notes!) and scrutinising the results. After installation, the focusing screen must be corrected for focus at three points in the centre to guarantee accurate focus. By way of explanation, slide film has a very narrow exposure latitude compared to the very generous latitude of negative film, so small errors in exposure, whether through the installation of another focusing screen, or to obtain an indication of the accuracy of the TTL prism (which is also known for derangement over a long period of time).

The viewfinder of the Pentax 6x7 / 67 will be even more annoyingly dark when you slap on an f4 or f4.5 lens. And more so still if you work with a polariser!

07-25-2017, 04:45 AM   #5
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Welcome aboard, remember to post some images here from the big bad boy.
07-25-2017, 10:59 AM   #6
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07-26-2017, 07:55 PM   #7
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---------- Post added 07-26-17 at 08:00 PM ----------

QuoteOriginally posted by Kerrowdown Quote
Welcome aboard, remember to post some images here from the big bad boy.
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