This custom focusing screen for the Nikon D50 DSLR is manufactured by Katz Eye™ Optics.

It is a laser matte with a split image prism circle and a microprism collar.
Directly replaces the original, with no modifications required to the camera at all.
The split image prism with microprism ring is a great combination for focusing in a variety of situations
Especially recommended for macro work, precise final manual focusing, and DOF checking.
NO effect on the functioning of the autofocus sensors of the camera
AF area indicators will continue to function normally.
All active viewfinder information, including focusing points remain functional.
These screens are of the Plus and OptiBrite classes combined, making then the brightest you have ever used.
This is a product recommended by Carl Zeiss for optimal manual focusing

Minimal or no effect on light metering.
The Katz Eye™ screens tested within +/- 1/3 stop of nominal.
The only exception is when using spot metering mode with lenses having a maximum aperture slower than f/4.0, when it is advisable to use either centerweighted average metering or matrix metering to preserve accurate meter response.
If spot metering mode must be used with a slow lens, it is advisable to set an appropriate exposure compensation by reading the histogram of a test shot.
This focusing screen for the Nikon D50 is the “Plus” version. A unique prism design delaying prism ‘blackout’ until well after f/11.
Ordinary split image prisms black out by about f/5.6, rendering them difficult to use with slower zoom lenses, teleconverters, or in extreme macro photography... but not this Katz Eye™ “Plus”.
This D50 screen is also of the OptiBrite class, designed to improve brightness at small apertures or in dim light.
The more you close down the aperture the more you can appreciate the improvement over regular screens.

For more information, please visit the home page for this product.

Nikon D50 Focusing Screen