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Meyer / Pentacon preset 2.8/135mm & 4/200mm aperture
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PostPosted: Wed Mar 30, 2011 6:41 am    Post subject: Meyer / Pentacon preset 2.8/135mm & 4/200mm aperture Reply with quote

I don't take any responsibility if your lens gets destroyed during procedure. Try only if experienced and you know what you're up to.

Want to clean or repair Meyer / Pentacon preset 2.8/135mm or 4/200mm from the inside (reaching aperture blades)? It is possible to do it without time consuming open-from-the back loosing all infinity adjustments.

Try aggressive approach: hold firmly part above aperture ring and turn counter-clockwise. You will tear small screw that is holding upper lens part from inside. But damage will be most probably minimal. You will still be able to screw part back after you fix aperture (or clean glass).