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11-21-2018, 05:10 PM - 1 Like   #1
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Notice: Accessory review sections now have 645 focusing screen listings

As many here already know, Pentax released three series of focusing screens for the 645 series of camera bodies. The U series with five members was released for the 645 and apparently fits only the 645. The A series with four members was released for the 645N and 645NII. These reportedly also fit the 645D and 645Z bodies. The D series with three members was released for the 645D and 645Z. They are anticipated to fit on the 645N and 645NII, but any limitations in that usage are unknown beyond what can be assumed from the difference in captured image sizes. Items addressing these focusing screen variants are now listed under the appropriate accessory topics.

Of possible particular interest because I find it unusual is the DK-80 accessory screen. This screen partitions the image area in proportion to the golden mean. More on this can be found in the DK-80 description.

Pentax supplies each of these focusing screens in a plastic box with a pair of tweezers and an instruction guide. Extreme care to not hit the first surface reflex mirror when swapping focusing screens seems to be advised.

Most of these screens do not have actual reviews. Members with experience that they want to relate are encouraged to write about it in the reviews. Formal testing is not necessary to provide insight to others.

DK-80 screen configuration

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11-23-2018, 07:38 AM   #2
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QuoteOriginally posted by kaseki Quote
As many here already know, Pentax released three series of focusing screens for the 645 series of camera bodies. The U series with five members was released for the 645 and apparently fits only the 645. The A series with four members was released for the 645N and 645NII. These reportedly also fit the 645D and 645Z bodies. The D series with three members was released for the 645D and 645Z. They are anticipated to fit on the 645N and 645NII, but any limitations in that usage are unknown beyond what can be assumed from the difference in captured image sizes. Items addressing these focusing screen variants are now listed under the appropriate accessory topics.

Of possible particular interest because I find it unusual is the DK-80 accessory screen. This screen partitions the image area in proportion to the golden mean. More on this can be found in the DK-80 description.

Pentax supplies each of these focusing screens in a plastic box with a pair of tweezers and an instruction guide. Extreme care to not hit the first surface reflex mirror when swapping focusing screens seems to be advised.

Most of these screens do not have actual reviews. Members with experience that they want to relate are encouraged to write about it in the reviews. Formal testing is not necessary to provide insight to others.

DK-80 screen configuration
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