cirke Posted November 15, 2015 Share #1 Posted November 15, 2015 (edited) Advertisement (gone after registration) on my 135 Apo telyt on the side (beside feet) 57 is written is it a 140,7mm ? 135 + 5,7 ?thank you Edited November 15, 2015 by erick Quote Link to post Share on other sites More sharing options...
Advertisement Posted November 15, 2015 Posted November 15, 2015 Hi cirke, Take a look here written on the side. I'm sure you'll find what you were looking for!
SiggiGun Posted November 15, 2015 Share #2 Posted November 15, 2015 Yes, that's it Quote Link to post Share on other sites More sharing options...
a.noctilux Posted November 15, 2015 Share #3 Posted November 15, 2015 By this discussion,http://www.l-camera-forum.com/topic/249125-small-19-beside-m-on-distance-scale-black-rigid-summicron/page-3 It is 135,7mm Arnaud Quote Link to post Share on other sites More sharing options...
cirke Posted November 15, 2015 Author Share #4 Posted November 15, 2015 thanks SiggiG and Arnaud Quote Link to post Share on other sites More sharing options...
mirekti Posted November 15, 2015 Share #5 Posted November 15, 2015 or 135.57mm ? Quote Link to post Share on other sites More sharing options...
Keith (M) Posted November 15, 2015 Share #6 Posted November 15, 2015 (edited) on my 135 Apo telyt on the side (beside feet) 57 is written Made by Heinz? Oddly enough, my APO Telyt also has '57' engraved on it. (Ser No. = 42395xx.) Edited November 15, 2015 by Keith (M) Quote Link to post Share on other sites More sharing options...
cirke Posted November 15, 2015 Author Share #7 Posted November 15, 2015 Advertisement (gone after registration) my serial number id 41797xx , strange to have on both 57 ! why do you say made by Heinz ? Quote Link to post Share on other sites More sharing options...
Bill Livingston Posted November 15, 2015 Share #8 Posted November 15, 2015 (edited) why do you say made by Heinz ? Because there is a company called Heinz that at one point advertised they had 57 varieties (of canned food). Heinz 57 is on tins of Heinz Baked Beans even today (and they have MANY more than 57 varieties these days - although I suspect most of us have only ever eaten one of them - if any at all!). Look up Andy Warhol... he did a painting of Heinz Beans... along with Campbells Soup and a few other iconic tinned food from the 50's and 60's... Edited November 15, 2015 by Bill Livingston 2 Quote Link to post Share on other sites More sharing options...
cirke Posted November 15, 2015 Author Share #9 Posted November 15, 2015 Thanks Bill for the explanations Quote Link to post Share on other sites More sharing options...
bocaburger Posted November 15, 2015 Share #10 Posted November 15, 2015 In the US it used to be if you had a mutt and someone asked what breed it was, people said it was a Heinz. 57 varieties Quote Link to post Share on other sites More sharing options...
mirekti Posted November 16, 2015 Share #11 Posted November 16, 2015 btw mine has 57 as well Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 16, 2015 Share #12 Posted November 16, 2015 btw mine has 57 as well They all should have 57 on them. They don't individually mark them, it is the correction factor to the focal length for that lens design. A change here would signify a change in the optical design. 57 is quite a big number though. Cheers, Michael Quote Link to post Share on other sites More sharing options...
mirekti Posted November 16, 2015 Share #13 Posted November 16, 2015 Thanks. 57 is quite a big number though. What does that mean? Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 16, 2015 Share #14 Posted November 16, 2015 They all should have 57 on them. They don't individually mark them, it is the correction factor to the focal length for that lens design. A change here would signify a change in the optical design. 57 is quite a big number though. Cheers, Michael I have to feed my curiosity, so I googled images of the telyt and found some with 62 on them. Indeed the one in the wiki is a '62'. So, I wonder when (and what) it changed? Cheers, Michael Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 16, 2015 Share #15 Posted November 16, 2015 (edited) Thanks. What does that mean? Nothing really, it's less than 5%, but I'd have thought they'd make the lens closer to 135 mm rather than 141 mm. It shows that the framelines cannot really be that accurate (to less than 5%) Cheers, Michael Edited November 16, 2015 by michaelwj Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 16, 2015 Share #16 Posted November 16, 2015 Nothing really, it's less than 5%, but I'd have thought they'd make the lens closer to 135 mm rather than 141 mm. It shows that the framelines cannot really be that accurate (to less than 5%) Cheers, Michael Sorry, I'm way off, it's of course 135.7, very close. (where is the blushing facepalm emoticn when you need it!) 1 Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted November 16, 2015 Share #17 Posted November 16, 2015 (edited) Hello Everybody, The 2 digit number on the lens mount indicates the last digit of the stated focal length accurately measured to 1/10th's of a millimeter. There is no decimal place shown since the number is measuring 1/10th's of a millimeter. So: A lens called a 135mm lens that has 57 on the lens mount is actually a lens which is 135.7 millimeters in length. Best Regards, Michael Edited November 16, 2015 by Michael Geschlecht 3 Quote Link to post Share on other sites More sharing options...
lct Posted November 16, 2015 Share #18 Posted November 16, 2015 +1 Quote Link to post Share on other sites More sharing options...
Exodies Posted November 16, 2015 Share #19 Posted November 16, 2015 Is that when focused at infinity? Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted November 17, 2015 Share #20 Posted November 17, 2015 Hello Exodies, Engraved focal lengths are for the lens focused at Infinity. Regardless of Brand/Format. Best Regards, Michael 3 Quote Link to post Share on other sites More sharing options...
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