In article <30FAF231.1C85@ccad.uiowa.edu>, smaddhi@ccad.uiowa.edu says...

>Under certain conditions one half of the split image focusing system
>blacks out...I have noticed it on a Minolta X-7.
>I am wondering if other cameras have this problem, and if there ways to
>avoid this happening ?

It is common with all split image RF's. Using a faster lens, or
moving your eye position to better center your eye will help.
Hope This Helps