Originally posted by pentaxus I suspect the focusing error bart86 sees is caused by the tab being on the wrong side so you put the focusing screen in "upside down". The smooth side should go down, the split image wedges go up.
Nope...not on any of the SLRs on my shelf (I have about a dozen). The screen installs with the Fresnel field and focusing aids facing towards the mirror with the focus plane being on that surface. Shims are installed in the second holder between the focus screen and the face of the pentaprism.
Steve
(...have done the screen replacement and shimming several times and currently am enjoying one of the last Katz Eye screens on my K-3...)
Last edited by stevebrot; 10-16-2018 at 09:34 AM.