m_sox Posted April 8, 2021 Share #1 Â Posted April 8, 2021 (edited) Advertisement (gone after registration) Hi I'm looking for precise info about the front element of M2 viewfinder. Anybody knows if the surfaces are flat and parallel? Thickness, width and height? Thank you so much for any help! Edited April 8, 2021 by m_sox Link to post Share on other sites More sharing options...
Advertisement Posted April 8, 2021 Posted April 8, 2021 Hi m_sox, Take a look here M2 viewfinder design. I'm sure you'll find what you were looking for!
a.noctilux Posted April 8, 2021 Share #2 Â Posted April 8, 2021 I never saw the inside so I can't answer. My best bet is contact angelfire (link) or someone here can answer, be patient. 1 Link to post Share on other sites More sharing options...
jerzy Posted April 8, 2021 Share #3  Posted April 8, 2021 I have now one open so I measured it, dimensions in mm, it is flat-concave. Do you think about making your own one? I do not know the focus length 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!  1 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/319705-m2-viewfinder-design/?do=findComment&comment=4176769'>More sharing options...
m_sox Posted April 8, 2021 Author Share #4  Posted April 8, 2021 33 minutes ago, jerzy said: I have now one open so I measured it, dimensions in mm, it is flat-concave. Do you think about making your own one? I do not know the focus length 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!  jerzy, that's super! Just to be sure: see the attached figure. I know it's not an M2, so it might be different... Is your picture refferred to A or B element? Link to post Share on other sites More sharing options...
jaapv Posted April 8, 2021 Share #5 Â Posted April 8, 2021 it should be possible to scan and print it. Link to post Share on other sites More sharing options...
pippy Posted April 8, 2021 Share #6 Â Posted April 8, 2021 (edited) 41 minutes ago, m_sox said: ...Is your picture refferred to A or B element?... I've checked on my old M2 top-plate and, if you are asking about part 'A', it is perfectly flat on both front and rear surfaces which are also parallel to each other. As near as I can measure it the glass is approx 23.5mm x 15mm x 1mm. The glass is cemented in place so it can't easily be removed to allow me to measure with complete accuracy. Perhaps someone else might have one 'loose' and can measure it to closer tolerances. Philip. Edited April 8, 2021 by pippy 1 Link to post Share on other sites More sharing options...
jerzy Posted April 8, 2021 Share #7 Â Posted April 8, 2021 Advertisement (gone after registration) vor 38 Minuten schrieb m_sox: Is your picture refferred to A or B element "A "element is just piece of glass (I believe 1mm thick, flat-flat), this is fixed in the top cover. I was showing element B which is mounted within rangefinder assy. Picture that you attached is a good representation of M2 rangefinder 1 Link to post Share on other sites More sharing options...
jerzy Posted April 8, 2021 Share #8  Posted April 8, 2021 Philip - I was just writing my reply when yours popped up 🙂 1 Link to post Share on other sites More sharing options...
jerzy Posted April 8, 2021 Share #9  Posted April 8, 2021 vor 1 Stunde schrieb jaapv: it should be possible to scan and print it interesting, do you know someone who would do it? Not glass, I suppose acryl. Correct?. I need few lenses for I and Standard viewer, cannot get them so if had  someone who can make it would be great. Link to post Share on other sites More sharing options...
john_talber Posted April 8, 2021 Share #10  Posted April 8, 2021 I would also be very interested to hear about how this would be manufactured by a third party or by using a 3-D printer.   Link to post Share on other sites More sharing options...
250swb Posted April 8, 2021 Share #11 Â Posted April 8, 2021 8 hours ago, jerzy said: "A "element is just piece of glass (I believe 1mm thick, flat-flat), this is fixed in the top cover. I was showing element B which is mounted within rangefinder assy. Picture that you attached is a good representation of M2 rangefinder If the front window A is what you are referring to, so flat glass, then look for 'glass microscope slides' on ebay. I've used them to repair rangefinder windows on medium format cameras, you just need to cut them to size with a diamond file or glass cutter. 1 Link to post Share on other sites More sharing options...
jerzy Posted April 9, 2021 Share #12 Â Posted April 9, 2021 vor 10 Stunden schrieb 250swb: look for 'glass microscope slides' on ebay. thx for the info, I bought once some of them. However I made a mistake - I measured element A, glass is something like 1,3mm thick, but 1,5mm glass will fit as well, fixing to the top cover is a bit flexible. 1mm glass is used for the small rangfinder window and bearing the size of element A in mind 1mm glass might be too delicate for this one. The small rangfinder window on the contrary must not be thicker, it will not fit into the holder. 1 Link to post Share on other sites More sharing options...
jaapv Posted April 9, 2021 Share #13  Posted April 9, 2021 19 hours ago, jerzy said: interesting, do you know someone who would do it? Not glass, I suppose acryl. Correct?. I need few lenses for I and Standard viewer, cannot get them so if had  someone who can make it would be great. Unfortunately I don't but there are 3D scanning and printing services. Google yields plenty, I found this one for instance. https://the-3d-print.de/ 1 Link to post Share on other sites More sharing options...
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