david werbeloff Posted July 22, 2014 Share #1 Posted July 22, 2014 Advertisement (gone after registration) Hello, All, I've been absent from the forum for a long time during which I seem to have found myself in the land of digital. I feel like a traitor to my Leica film cameras... Last year I bought a little Panasonic GX1 body and, with three adapters I can use all my Leitz lenses, admittedly with the 2x crop factor. I've been very happy with this arrangement. Since a 200mm in 35mm terms becomes a 400 on the GX1, I started looking for a Telyt-V 200, and landed a fine 1961 example last week, complete with OUBIO and B+W UV filter. As I was examining the lens I noticed a little engraving on the focus scale. A photo is attached. Any ideas what the "85" signifies? As an addendum, this image was made with the GX1, Bellows II, and 90mm Elmarit lens head with 16471. I look forward to your responses. Best wishes, David P.S. My image didn't upload. Let's try this again... Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/230907-telyt-v-200mm-marking/?do=findComment&comment=2635007'>More sharing options...
Advertisement Posted July 22, 2014 Posted July 22, 2014 Hi david werbeloff, Take a look here Telyt-V 200mm marking.. I'm sure you'll find what you were looking for!
k-hawinkler Posted July 22, 2014 Share #2 Posted July 22, 2014 ... Since a 200mm in 35mm terms becomes a 400 in field of view on the GX1 ... It's still 200 mm in focal length though. Link to post Share on other sites More sharing options...
jaapv Posted July 22, 2014 Share #3 Posted July 22, 2014 Many Leica lenses have this engraving. It denotes the offset in focal length of this individual lens. Link to post Share on other sites More sharing options...
luigi bertolotti Posted July 22, 2014 Share #4 Posted July 22, 2014 Many Leica lenses have this engraving. It denotes the offset in focal length of this individual lens. Right... If I remember well the significance, ought to mean that nominal 200mm is, on this item, a 198,3mm effective focal... Link to post Share on other sites More sharing options...
Orient XI Posted July 22, 2014 Share #5 Posted July 22, 2014 198,5mm Luigi! Mine of similar vintage is 199,8mm. Link to post Share on other sites More sharing options...
luigi bertolotti Posted July 22, 2014 Share #6 Posted July 22, 2014 198,5mm Luigi! Mine of similar vintage is 199,8mm. You'r probably right... It seemed to me to remember a different formula (0,85% less than the nominal length) but surely can be wrong... Link to post Share on other sites More sharing options...
Michael Geschlecht Posted July 22, 2014 Share #7 Posted July 22, 2014 Advertisement (gone after registration) Hello David, Welcome back. Best Regards, Michael Link to post Share on other sites More sharing options...
k-hawinkler Posted July 22, 2014 Share #8 Posted July 22, 2014 Based on this discussion http://www.l-camera-forum.com/leica-forum/customer-forum/169584-marking-summilux-50-a-2.html the actual focal length seems to be 198.5 mm, no? Link to post Share on other sites More sharing options...
lm_user Posted July 22, 2014 Share #9 Posted July 22, 2014 I must not understand. I would have guessed 199.15 or 200.85 Link to post Share on other sites More sharing options...
david werbeloff Posted July 23, 2014 Author Share #10 Posted July 23, 2014 Hello, All, Thank you for the usual erudite responses. I feel like a bit of a chump because I have subsequently looked at my 1960 Elmar f4, 1961 Telyt 400 f5 and 1961 Elmarit 90. The first two have the same numeral engraved at right angles on the focus scale as the 200mm. I've been looking at these lenses for years and never noticed that detail until now... The Elmarit has the usual scratched numbers on the side of the optical unit and the last three digits of the serial number on the inside of the focus helical. Is one to understand that lens units in a particular focal length range were paired with barrels which were pre-engraved? Thank you Luigi, for your explanation of the calculation factor represented by "85". Thank you K-H, for your correction of "field of view". Thank you, Michael, for your greeting. Best wishes, David Link to post Share on other sites More sharing options...
luigi bertolotti Posted July 23, 2014 Share #11 Posted July 23, 2014 Based on this discussion http://www.l-camera-forum.com/leica-forum/customer-forum/169584-marking-summilux-50-a-2.html the actual focal length seems to be 198.5 mm, no? .... or 208,5 ? (a rather great tolerancing... but similar to the Summicrons 50 that are 52,2... ) Anyway, David, the Telyt 200 f4 has the lens unit unscrewable from the focus unit (for usage on devices like the Focorapid) , and the real focal length ought to be hand engraved onto the inner barrel. Link to post Share on other sites More sharing options...
jaapv Posted July 23, 2014 Share #12 Posted July 23, 2014 I do not have it to hand, but I seem to recall that Puts' Compendium has the tables in an Appendix. Link to post Share on other sites More sharing options...
Orient XI Posted July 23, 2014 Share #13 Posted July 23, 2014 The pair of small numbers give the focal length to one tenth of a millimetre. The first of these gives the focal length to one millimetre. Thus, a nominal 200mm lens stamped "85" is actually a 198mm lens or more accurately a 198.5mm lens. Similarly a 50mm lens stamped "22" is actually a 52.2mm lens. Some 50mm lenses (e.g. f/3.5 Elmars) have a different code system where a single number is stamped on the back of the focussing tab. Link to post Share on other sites More sharing options...
Orient XI Posted July 23, 2014 Share #14 Posted July 23, 2014 Laney discusses the matching of lens mounts to lens heads of the second version of the f/2 50mm Summicron in both editions of his Leica Collector's Guide (the 2nd edition gives an erroneous cross-reference to the f/3.5 Elmar). Three exact focal lengths of 51.6, 51.9, and 52.2mm were catered for; each should be matched to the mount. The codes stamped on the back of the focussing tab were 7 or 18 (16 Orient XI?) for 51.6mm, 8 or 19 for 51.9mm, and A for 52.2mm. Laney cautioned buyers to check that the lens head was matched the mount with regard to these focal length groups. Link to post Share on other sites More sharing options...
Michael Geschlecht Posted July 23, 2014 Share #15 Posted July 23, 2014 Hello Everybody, The engraving in tenths of a millimeter (ie: 15 = 1.5mm) of the actual focal length of that specific lens's optical unit on the outside of its individual focussing mount began sometime in 1960. Some lenses from that year have the engraving some do not. There are some lenses that were produced over the years after 1960 that did not, or did not always, have the actual focal length engraved on the focussing mount. This engraving of the actual focal length on the outside of the focussing mount has been done with both rangefinder & reflex lenses. This engraving is generally for lenses that are 50mm long or longer. Best Regards, Michael Link to post Share on other sites More sharing options...
luigi bertolotti Posted July 23, 2014 Share #16 Posted July 23, 2014 .... Thus, a nominal 200mm lens stamped "85" is actually a 198mm lens or more accurately a 198.5mm lens. Similarly a 50mm lens stamped "22" is actually a 52.2mm lens.... Ok... but why not 208,5 ? Same reasoning fits good also like this... even better... Link to post Share on other sites More sharing options...
k-hawinkler Posted July 23, 2014 Share #17 Posted July 23, 2014 Ok... but why not 208,5 ? Same reasoning fits good also like this... even better... That would better fit a lens labeled 210 mm, I would naivelt think. May be someone has to look up Puts' Compendium table Jaap referred to. Link to post Share on other sites More sharing options...
luigi bertolotti Posted July 23, 2014 Share #18 Posted July 23, 2014 Anyway... I finally checked mine (1.888.491, Wetzlar) : "95" in the usual position , and the lenshead has a very clear "199,5" hand engraved on the barrel' side. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/230907-telyt-v-200mm-marking/?do=findComment&comment=2636151'>More sharing options...
k-hawinkler Posted July 23, 2014 Share #19 Posted July 23, 2014 Anyway... I finally checked mine (1.888.491, Wetzlar) : "95" in the usual position , and the lenshead has a very clear "199,5" hand engraved on the barrel' side.[ATTACH]448339[/ATTACH] [ATTACH]448340[/ATTACH] Many thanks Luigi. I have two 200 mm f/4 TELYTs. • LENS MADE IN CANADA..., 1851172, no marking. On lens barrel is scratched: 226 (upside down) • LENS MADE IN GERMANY, 1972505, no marking. On lens barrel is scratched: 200 (upside up, like yours) Go figure. Link to post Share on other sites More sharing options...
Orient XI Posted July 24, 2014 Share #20 Posted July 24, 2014 Luigi, 208.5mm is too far away from the nominal focal length. I note that my "125mm" Hektor, which is really 120mm, has no marking. Link to post Share on other sites More sharing options...
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