Filter thread on some compact cameras; also found on some enlarger lens mounts.
Filter thread used on some cameras and optical instruments; also on some microscope eyepiece tubes.
Thread used on some Nikon microscope nosepieces and trinocular phototube adapters.
Filter thread found on many older Japanese cameras (e.g. Canonet, Olympus Trip, some Minolta rangefinders). One of the more common vintage compact camera filter sizes.
Nominal thread diameter 31 mm; pitch 0.5 mm. Right-hand; 1 start.
Nominal thread diameter 31 mm; pitch 0.75 mm. Right-hand; 1 start.
Nominal thread diameter 31 mm; pitch 1 mm. Right-hand; 1 start.
Filter thread on some vintage compact cameras.
Filter thread; also found on some microscope condensers and lab optical components. Yet another application is a Kiev-16U cine camera.
Standard thread for some Nikon microscope objectives (older series and BD-plan series). Also used on some Nikon microscope nosepieces and trinocular adapters.
Compatibility and limitations: Do not confuse with M32.5x0.5 (enlarger Copal #0 thread).
Nominal thread diameter 32 mm; pitch 1 mm. Right-hand; 1 start.
Nominal thread diameter 32 mm; pitch 40 tpi. Right-hand; 1 start.
Copal #0 shutter thread and rear mount thread for many enlarger lenses: Schneider Componon-S, Rodenstock Rodagon, some El-Nikkor variants. Standard for 35mm format enlarger lenses on many lensboards.
Filter thread on some compact cameras and binoculars.
Filter thread on some vintage cameras and binoculars.
Nominal thread diameter 33.2 mm; pitch 0.8 mm. Right-hand; 1 start.
Filter thread found on some compact cameras.
Filter thread on some cameras, notably some Konica models.
Filter thread on various cameras; also found on some Leica accessories.
Thread on some older enlarger lenses and optical accessories.
Nominal thread diameter 34 mm; pitch 1.5 mm. Right-hand; 1 start.
Filter thread on some compact cameras, notably some Olympus Stylus/μ series models.
Nominal thread diameter 35 mm; pitch 0.5 mm. Right-hand; 1 start.
Some Schneider projector lenses. MIPOS positioners.
Nominal thread diameter 35 mm; pitch 1 mm. Right-hand; 1 start.
Filter thread on some vintage cameras, including certain Leica models and some Voigtländer lenses.
Equipment and systems: Kiev-16U lenses (but be careful - another version with M33x0.5 thread exists)
LCM-20MP-35MM-F2.8-1.1-ND1
Obj LINOS MeVis C 25mm/f1,6
Filter thread on some old lenses.
Equipment and systems: Some Zeiss Stasi lenses.
Filter thread on some cameras and optics.
Filter thread; also used on some telescope accessories.
Found on some telescope eyepieces and photo accessories; also the front filter thread of some early Leica lenses.
Thread on some telescope accessories, notably used by Baader Planetarium for some 1.25" eyepiece adapters.
Filter thread found on some cameras, notably early Leica M lenses and some Voigtländer Bessa models.
Beastgrip Pro phone cage.
Equipment and systems: Century Optics .65x HR Wide Angle Converter.
Nominal thread diameter 37 mm; pitch 1 mm. Right-hand; 1 start.
Filter thread on some cameras; found on some enlarger lens accessories.
Equipment and systems: 10mm C-mount Switar lens.
Filter/accessory thread; also seen on some enlarger lenses.
Nominal thread diameter 38 mm; pitch 0.8 mm. Right-hand; 1 start.
Found on some enlarger lenses and photo accessories.
Uncommon thread on some enlarger or specialty optical equipment.
Nominal thread diameter 38 mm; pitch 48 tpi. Right-hand; 1 start.
Filter thread for Leica M lenses and some rangefinder camera lenses with 39mm front diameter.
Filter thread used on some Soviet camera lenses (e.g. Industar, Jupiter series) and some enlarger lenses. Not to be confused with LTM (M39x1/26tpi).
Leica Thread Mount (LTM) — the original Leica screw mount introduced in the 1930s. Also used on Soviet rangefinder cameras (FED, Zorki, Kiev, early Zenit) and most enlarger lenses globally (L39 enlarger mount). One of the most common threads in the catalogue.
Compatibility and limitations: Note: LTM pitch is 26 tpi (≈0.977mm) not a true metric 1mm pitch, but the difference is negligible for short threads.
Uncommon specialty thread found on some vintage Soviet and Eastern European optical equipment.
Filter thread on some cameras.
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