Group: Member
Post: 3 (1 liked)
Join date: February 2024
Status: Yahsica owner since 1991, it was my first camera :-)
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on Feb 2, 2024 11:25:09 GMT
Posted: Feb 2, 2024 11:25:09 GMT
Hi friends, I recently adquired a unit of the first SLR model, Pentamatic. It's the first version, not II or S, only Pentamatic. A semiautomatic version that doesn't release the aperture (maybe the mirror too) ultil the film is advanced. The camera comes with the standard 50 f:1.8 lens, glass are clear and great general status but with oil in aperture blades and they doesn't move at required speed. It's not a big problem because it's a common issue in old lens. The problem is the body, it's in very nice condition but it's blocked. The mirror is up, not shoot, not advance,.. The seller told me that the camera was his father's camera who passed away 40 years ago. I supose that the camera has been in this position (status after shoot) for at least 40 year, and it make it stuck. And the question is :-)... Has somedoby any repair/parts documentation. I know this camera was inspired in Exakta model, and Exakta documentation could help but I would like to have the actual Pentamatic documentation. It's a beatiful and historical piece and I would like to bring it back to life (also, I promise to try it to previous owner to glorify his father memeory ). So appreciate any help or ideas to repair it. Reagards from Spain. Arturo H&M.
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Group: Member
Post: 5 (1 liked)
Join date: April 2021
Status:
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on Feb 9, 2024 2:10:25 GMT
Last Edit: Feb 9, 2024 2:34:15 GMT by johnfarrell
Hello, Arturo. There is very little repair information available for these early Yashica SLR cameras. Their engineering is not that similar to Exaktas - more like other Japanese cameras of their era. I have a Pentamatic which had similar symptoms to yours. The problem was caused by the second shutter curtain not releasing the wind lock. The curtain shaft bearings were dry, and the shutter curtain stiff with age. This stopped the curtain from moving fully across the film plane. The curtain shaft drives a gear which has a stud on it. This stud engages with a plastic block on a lever at the base of the mirror box, and moves the lever. This movement allows the mirror to return to the rest position. The camera can then be wound for another shot. The gear with stud (green arrow) The bottom of the mirror box, with the block pushed by the stud (green arrow) and the direction it is pushed (yellow arrow).
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Group: Member
Post: 3 (1 liked)
Join date: February 2024
Status: Yahsica owner since 1991, it was my first camera :-)
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on Apr 24, 2024 13:38:59 GMT
Posted: Apr 24, 2024 13:38:59 GMT
John, I think you have more skills and experience than me repairning cameras. I never open a camera to this level of disasembly and I afraid that if try, it will be dangerous for the camera (at least with my current skills). I'll keep your tips and try to improve my skills with other cameras before to open this one.
Thank you very much for the indications.
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