i was given have a kiev 88 with a split focus sreen, this screen seamed to be not very bright, i then realised that it was mounted backwards, with the matte finish on top.
after a search i came the matte side of the screen needs to be turned down, in the direction of the mirror.

but i can't focus 100% with the split image, for example to the infinity.

the screen has a metal frame, matte glass with the split magnifying glass, a frame spacer and a clear glass with a grid.

what is the correct position of these elements?
should the convex part of the magnifying glass be to top or bottom?

can anyone check on their kiev, or hasselblad, how the focus screen is mounted?

thanks everyone