|Posted: Sun Mar 01, 2015 11:14 pm Post subject: Preset Biotar M42 disassembly
|I have a preset Biotar in M42 mount, serial no 3705047 that I would like to clean and relube.
It does not have a limiter screw, and I don't know where to start with to take the lens apart.
I've seen some info on the web, such as this drawing:
But so far I did not really dare to start somewhere.
I did unscrew the nameplate, which gives access to take out the front elements to are in front of the aperture.
Anyone any experience with this specific lens?
The rear element has a slotted ring, but turning that feels very stiff and the drawing in the link above describes that it has no thread, so you shouldn't use it. EDIT: I was looking at the drawing for auto diaphragm lenses. There is a drawing of preset lenses below, still I don't know where to start using that drawing..
DSLR: Canon 6D, Canon 400D
SLR: Praktica MTL5, Topcon RE-2, Topcon RE Super, Nikon EM, Chinon CE-3 Memotron, Pentacon F, Zenit 12-XP
Rangefinder: Zorki 4K, Ricoh 500G, Olympus 35 SP, Neoca 2S
Folder: Afga Isolette-I
Compact: Olympus mju-I
AF: Tamron 28-75 f/2.8 XR Di LD
Exakta: Meyer-Optik Trioplan 50/2.9, Primagon 35/4.5
M42: Sigma Mini Wide 28/2.8, Auto Chinon 28/2.8, Meyer-Optik Lydith 30/3.5, Pentacon Electric 29/2.8, Mir 1b 37/2.8, Super-Takumar 50/1.4, Meyer-Optik Oreston 50 f/1.8, Auto Yashinon 50/2, CZJ Tessar T 50/2.8, E. Ludwig Meritar 50/2.9, Meyer-Optik Primotar E 50/3.5, Industar 50-2 50/3.5, SMC Takumar 55/2, CZJ Biotar 58/2, Helios 44 58 f/2, Jupiter-9 85 f/2, Meyer-Optik 85/3.5, Super-Takumar 105/2.8, Accura Super Tc 135/2.8, Pentacon Zebra 135/2.8, Jupiter-11 135 f/4, Chinon MC Auto 200/3.5, Accura Supertel Tc 200/4.5, Soligor C/D Macro+Zoom 80-200/4.5
F-mount: Nikon Series E 28/2.8, 50/1.8, 100/2.8, Nikkor-S 35/2.8, Nikkor-H.C 50/2, Nikkor-H 85/1.8
Topcon: RE Auto Topcor 35/2.8, RE. Auto Topcor 58/1.8, RE. Auto Topcor 135/3.5
OM: Zuiko Auto-S 50/1.