I finally got the ISCO lens apart and fixed the focus problem. Couldn't get into the iris mechanism, so I ignored it.
It has an aluminum body. The lens is marked "JSCO", instead of "ISCO". Scott posted that using a "J" instead of an "I" died out after WWII, so I'm guessing this lens was made just after WWII. (When was the M42 mount introduced?) Its first pictures on Flickr: http://www.flickr.com/photos/[EMAIL PROTECTED]/sets/72157600588847029/ Comments and criticisms are welcome! Cheers Mike On Apr 17, 2007, at 9:58 AM, P. J. Alling wrote: > ISCO is a German manufacture of precision lenses. They made a lot of > well respected of lenses for the Exacta, and later varying quality > lenses in M42 mount. The quality seems to run from just awful to > excellent, with build quality in the same range depending on era. I > don't know if yours is one of the newer plastic body .lenses or an > older > machined metal version, but I doubt it's worth repairing. It probably > isn't all that rare and thought there are really very few 50mm lenses > optically terrible it's unlikely to be a sterling performer after > fungus > removal. > > Beaker wrote: >> Hi- >> >> What is the reputation of JSCO-GOTTINGEN? >> >> I just bought a Westar 50mm, f2.8 lens, in M-42 mount, on e-bay. For >> $12.00, including shipping. Was curious about the lens, and he price >> was right. >> >> It arrived today, and I'm glad that is all I paid. Dosn't look like >> it is coated, it has traces of fungus, the iris is stiff, and focus >> isn't very smooth. Unless it is valuable enough to send out for >> repair, I think I'll use it as my first attempt at lens repair. >> >> Any favorite web pages that deal with lens repair? >> >> Thanks for your help, >> Mike Beacom >> >> >> > > > -- > Entropy Seminar: The results of a five yeer studee ntu the sekend > lw uf thurmodynamiks aand itz inevibl fxt hon shewb rt nslpn raq liot. > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
