I know there are more, and will add as I hear of them.
Suggestion - advise edits needed by PM, or this forum "thread" will grow forever
Admin - please edit.
With thanks to many contributors
Lens and Objective mounting threads:
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0.8" x 36tpi RMS microscope objectives Includes many Finite objectives (except eg Nikon BDs;, and some Nikon Infinites including CF and BE. 25mm x 0.5mm Schneider enlarging lenses 25mm x 0.75mm Nikon CFI60 Infinite microscope objectives, 1" x 32tpi C mount (32 tpi = 0.794mm) 1.035" x 40tpi (40 tpi = 0.635 mm) ThorLabs SM1 lens tube system for 1" diameter optics. Many adapters available, to objective etc, threads. 26mm x 36tpi Mitutoyo infinity microscope objectives (36 tpi = 0.706mm) 26mm x 36tpi Olympus neo splan/dplan infinity metallurgical objectives 26mm x 0.75mm Nikon BD 210mm finite objectives, Nikon LU Infinites, and others 26mm x 0.75mm Nikon Measurement Microscopes (MM40 and others) 27mm x 0.75mm Nikon BD infinity objectives 27mm x 0.75mm Zeiss Infinity Microscope Objectives 28mm x 0.5mm Schneider enlarging lenses 28mm x 0.75mm Some Reichert Microscope Objectives 29.5mm x 0.5mm Schneider M-Componon 28mm f/4, M-Componon 50mm f/4, M-Componon 80mm f/4 (?) 30mm x 0.5mm Schneider enlarging lenses 30.5mm x 0.5mm Schneider enlarging lenses 32mm x 0.75mm Nikon LU BD Plan series of large industrial objectives 32.5mm x 0.5mm Some Enlarger lenses eg Schneider (eg135mm f/5.6) Rodenstock, early Nikon EL (eg 80, 105). Some Nikon EL came with adapter to 39mm 35mm x 0.5mm Schneider enlarging lenses 39.0mm x 0.75mm Schneider MAKRO-SYMMAR HM 180mm f/5.6 39mm x 26tpi Leica lens mount. The Enlarger lens standard. Often quoted as 1mm (26 tpi = 0.977mm) 40mm x 36TPI Mitutoyo BD Plan APO Microscope Objectives (36 tpi = 0.706mm) 40mm x 0.75mm Leitz eg Photar Symmar eg 50mm f/2.8 42mm x 0.75mm T2 standard mount 42mm x 1mm "M42" Pentax/Praktika lens mount, a common standard 43mm x 0.75mm Schneider enlarging lenses 45mm x 0.75mm mount for 75mm, 95mm, and 105mm Printing-Nikkors, also used on the adapters and extensions for the Rodenstock Modular Focus Unit. 50mm x 0.75mm Schneider enlarging lenses 50mm x 1.0mm Leica / Wild Heerbrugg M3B, M3C, M3Z, MS5, MZ6, MZ7.5, MZ9.5 52mm x 1.0mm Leica Stereo Zoom S4E, S6, S6D, S6E, S6T, S8APO 55mm x 0.75mm Schneider enlarging lenses 66mm x 0.75mm Schneider enlarging lenses 77mm x 0.75mm Schneider enlarging lenses 90mm x 1mm Schneider enlarging lenses Note "Mxx" is considered equivalent here to "xxmm" eg M42 == 42mm
See eg Hoya Catalogue P17
Enlarging lens filter threads, used eg for reversing: Pitch 0.5mm or 0.75mm, shown where known.
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30.5mm Rodenstock Rodagon 28mm, 35mm, Rogonar-S 28mm, 35mm Schneider Old Style Componon *, 28mm, 35mm, 50mm, 60mm, 80mm, 105mm Xenon 40mm f/2.8 34.5mm Nikon - check, there are two styles of El Nikkors El-Nikkor 50mm F/4 EL-Nikkor 75mm f/4 EL-Nikkor 80mm f/5.6 EL-Nikkor 105mm f/5.6 35.5mm Schneider Comparon 105mm Componar C105mm Componon WA60mm 40.5mm x 0.5mm Nikon El-Nikkor 50mm f2.8 & N, El-Nikkor 63mm f2.8 & N, El-Nikkor 75mm f5.6 & N, ?? El-Nikkor 105mm f5.6 & N Rodenstock, Rodagon 35mm, 50mm, 75mm, 80mm, 105mm, Schneider Comparon 135mm f/5.6 Yashica 40mm f3.5 43mm x 0.75mm Nikon El-Nikkor 135mm f/5.6 and others Rodenstock, Rogonar-S, 50mm, 60mm, 75mm, 90mm, 105mm, Rodagon 50mm, 60mm, 80mm, 105mm, 135mm Rodagon-WA, 40mm, 60mm, 80mm, Rodagon-G, 50mm, 105mm, Apo Rodagon-N, 50mm, 80mm, 90mm, 105mm, Apo Rodagon-D, 1:1 75mm f/4, 2:1 75mm f/4.5 Schneider Comparon 50mm, 75mm Componon New Style 50mm, 60mm, 75mm, 105mm Componon-S 50mm, 80mm, 100mm* Componon WA 40mm HM Apo Componon 40mm f/2.8, 45mm f/4, 50mm f/2.8 Computar/Kowa DL 50mm f/2.8 DL 50mm f/2.8 DL 55mm f/1.9 Varifocal 50-90 DL 135mm f/5.6 DL 65mm f/3.5 DL 80mm f/4.5 DL 90mm f/4.5 DL 105mm f/4.5 49mm Rodenstock Rodagon-G 150mm Schneider Componon-S 135mm, 150mm 52mm x 0.75mm 135mm Schneider Componon-S Computar DL 30mm f/2.8 62mm x 0.75mm 150mm Schneider Componon-S 67mm x 0.75mm Computar Varifocal 105-150 72mm x 0.75mm 180mm Schneider Componon-S 82mm x 0.75mm 210mm Schneider Componon-S 100mm x 1mm 240mm Schneider Componon-S 110mm x 1mm 300mm Schneider Componon-S Notes: "Old" and "New" style Schneider lenes are known to occur with different filter threads Rodenstock Rodagon 28mm and 35mm, and Omegaron 25mm f/4 lenses have no filter threads on some (later?) versions --- Minolta Rokkor 25mm f/3.5 tba 30mm MC f/2.8 No filter thread 50mm MC f/2.8 ? 50mm f/4 ? 75mm f/4.5 ?
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COPAL spec. #0 #1 #3 #3s front thread M29.5-0.5 M40-0.75 M58-0.75 M56-0.75 back thread M29.5-0.5 M36-0.75 M58-0.75 M56-0.75 overall thickness 20 mm 20 mm 32 mm 28.6 mm front to iris 10.2 mm 10.75 mm 17.7 mm 16.25 mm mount thread M32.5-0.5 M39-0.75 M62-0.75 M61-0.75 lensboard hole 34.6 mm 41.6 mm 65 mm 64.1 mm iris dia 24 mm 30 mm 45 mm 45 mm
Lens register distances, and some thread sizes:
http://www.graphics.cornell.edu/~westin ... ister.html
An important macro lens listing:
A forum discussion of Nikon and Mitutoyo M26 objective mounting threads:
A "Big list of Enlarger Lenses" - many of the above are on this list but some aren't.
1" means one inch, tpi means Threads Per Inch (pitch)
One inch = 25.4mm