Thanks Piers,
I had seen a comment about the Rubinars having the secondary on the meniscus
lens while the MTO had the secondary mounted away from it. The cross section
is interesting.
Poking around on yabe turned up some Rubinars
500/5.6 7630542378
300/4.5 7624491833 (the sample photos are nice - a 12 yr old smoking?)
They look much more conventional than the Grand Prix Brussels 1958 MTO lens.
500/8 7631767615
-jeff
----Original Message Follows----
From: "Piers Hemy" <piers@xxxxxxxx>
MTO = Maksutov Tele-Objective
The design dates from 1958, when two versions were released - MTO-500 and
MTO-1000, with focal lengths readily guessed from the type number!
The optical layout of each can be seen at these links (which refer to the
original 39mm screw mount versions, having a film-flange register of 45.2mm,
for the original Zenit SLR cameras developed from the Leica-copy FED body
design):
http://zenitcamera.com/archive/lenses/mto-500.html
http://zenitcamera.com/archive/lenses/mto-1000.html
--
Piers
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