Hello everyone,
While browsing stuff on eBay and searching for a reasonably priced Super Symmar HM, I have found this:
https://www.ebay.com/itm/39498428840...EAAOSw3a9j58TM
It's an APO-Tele-Xenar HM convertible lens with 600/8 and 800/11 options. It has a blue ring typical for HM series of lenses from Schneider.
I have failed to find much info about this kind of lens. I found that Schneider used to make non-convertible 400mm/5.6 and 800mm/12 APO Tele Xenar HMs, with distinct light gray colored front (and the blue ring). Most recent Schneider's lens catalog has an APO Tele Xenar convertible lens, but it's 600mm/9 and 800/12, so slightly slower than ones from the above link, and without HM designation.
Has anyone here ever seen (and maybe used) such lens like that blue ringed Schneider convertible tele? I'm curious about how it performs and how rare it is.
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