Site Supporter Registered: October, 2008 Location: Vancouver, Canada Posts: 8,092
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| | Review Date: February 15, 2014 | Recommended | Price: $43.00
| Rating: 9 |
| Pros: | A must for telephoto and rear converter work. | | Cons: | Not recommended for general use and may cause slight exposure errors when using the AE prism. | |
This is a specialty screen for macro and telephoto lenses that makes the viewfinder “brighter” to aid in focusing. I use mine only with my 6x7 Takumar 400/4, 600/4, M*800/6.7 & rear converter when I want to keep the horizon straight and I don’t need to critical focus, I use my BA-81 "bright" screen when I do. The viewfinder is much brighter and does help in focusing, even though the centre circle has no focusing aid.
Pentax recommends caution when using this screen with stopped-down metering or rear converters. The brighter screen may affect exposure when metering with the AE prism. I have not noticed this yet.
This screen works best when the telephoto lens/rear converter combination have a maximum aperture of f5.6 or over.
Price: I purchased this screen new from a store in Japan on eBay.
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