Originally posted by disco_owner It would have been really nice to see a Close-able hatch for the OVF as an added feature , like the Nikon Dslr 's. seeing the new K-3 has a redesigned Diopter adjustment Pentax could have thrown that in the works.
Pentax had viewfinder blinds on several of their film SLRs, including the K2DMD, one of which I have. The main use was to keep stray light from entering the eyepiece and affecting the exposure. I've no idea why they've never included this feature since, except maybe to keep costs down, as they did with the aperture coupler on the KAF mount variant. Little touches like that, though, added to the appeal of Pentaxes in the past, and that's something they should bear in mind for the future.