jon_shumpert2 Posted February 24, 2017 Share Posted February 24, 2017 I recently bought an OM-1 and have been using it this week. The focusing screen has some dark spots on it which won't come off. I like the split image for focusing and am looking for suggestions for what focusing screens I should look for. I currently have a 50mm f1.4 and a 100mm f2.8, but I am going to buy a 24mm f2.8. Thanks for the help. 1 Link to comment Share on other sites More sharing options...
michael_frangos Posted March 4, 2017 Share Posted March 4, 2017 Have a look at: http://olympus.dementix.org/eSIF/om-sif/findergroup/focusingscreens.htm and http://www.mir.com.my/rb/photography/hardwares/classics/olympusom1n2/shared/accessory/screens/index.htm Link to comment Share on other sites More sharing options...
john_hermanson2 Posted April 1, 2017 Share Posted April 1, 2017 Dark spots are likely a deteriorated pentaprism, and not the focus screen. They can appear as bubbles or full black patches. Foam pressed against the prism has rotted and eaten through the prism coating. Only fix is to replace the prism. John, www.zuiko.com Link to comment Share on other sites More sharing options...
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