S-mount (board lens mount). Standard for CCTV cameras, IP cameras, drone cameras, Raspberry Pi cameras, machine vision boards, and action cameras. |
CCTVSMARTPHONE | |
S-mount (board lens mount). Standard for CCTV cameras, IP cameras, drone cameras, Raspberry Pi cameras, machine vision boards, and action cameras. Particularly, Shiftcam lenses. |
CCTVSMARTPHONE | |
Larger board-mount lenses for industrial cameras and some CCTV applications requiring a wider barrel than M12. |
CCTV | |
Thread used in some smartphone lens accessories (e.g. Apexel, FotoZ, Sandmarc clip-on lenses for iPhones). Appears on telephoto and wide-angle add-on lenses for mobile photography. |
SMARTPHONE | |
Found in some industrial and specialty board cameras; also used as a filter thread on small optics. |
CCTV | |
Found on some older and Eastern European microscope objectives; also appears on certain telescope accessories. |
MICROSCOPE |
Uncommon thread found on some specialty microscope objectives and photomicroscopy equipment. |
MICROSCOPE | |
Occasionally used on small microscope condensers and photographic accessories. |
MICROSCOPE | |
Used on small Meopta enlarger lenses (e.g. Anaret 50mm/80mm from Opemus enlargers) and some Eastern European microscope accessories. |
ENLARGERMICROSCOPE | |
Small filter and accessory thread found on some compact optics, cine lenses, and microscopy equipment. |
FILTERMICROSCOPE | |
Thread on some microscope objectives and condensers; also used in certain industrial optical mounts. |
MICROSCOPE | |
Uncommon thread encountered on some vintage microscope objectives. |
MICROSCOPE | |
Standard thread for Nikon (CFI60 system) and Leica infinity-corrected microscope objectives. Both brands adopted this size when they moved away from the universal RMS standard. Also used in some Thorlabs optical systems. |
MICROSCOPE | |
Durst enlarger Lapla lensboard thread (25mm mount); also found on some older microscope eyepiece tubes. |
ENLARGERMICROSCOPE | |
Standard for Mitutoyo infinity-corrected plan-apochromat objectives (M Plan Apo, M Plan Apo HR series). Also called W26; conforms to ISO 9345 / JIS B 7141. Sometimes labelled M26 by sellers. |
MICROSCOPE | |
Thread on some specialty microscope and optical industry components. |
MICROSCOPE | |
Rare thread found on some niche microscopy and industrial optical mounts. |
MICROSCOPE | |
Standard thread for Zeiss infinity-corrected microscope objectives (Plan-Apochromat, Plan-Neofluar, etc.). The canonical Zeiss objective thread for modern research microscopes. |
MICROSCOPE | |
Filter thread used on some compact cameras and small optics; also found on microscopy accessories. |
FILTER | |
Uncommon pitch found on some enlarger accessories and specialty optical mounts. |
ENLARGER | |
Filter thread found on some compact cameras, bridge cameras, and small scope accessories. |
FILTER | |
Found on some older enlarger and repro lenses. |
ENLARGER | |
Thread used on some Leica and Leitz enlarger lenses and accessories. |
ENLARGER | |
Rare specialty thread found on some vintage enlarger or repro lenses. |
ENLARGER | |
Filter thread on some compact cameras; also seen on microscopy accessories. |
FILTER | |
Filter thread found on some older compact and rangefinder cameras. |
FILTER |
Filter thread on some compact cameras; also found on some enlarger lens mounts. |
FILTER | |
Filter thread used on some cameras and optical instruments; also on some microscope eyepiece tubes. |
FILTERMICROSCOPE | |
Thread used on some Nikon microscope nosepieces and trinocular phototube adapters. |
MICROSCOPE | |
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. |
FILTER | |
Filter thread on some compact cameras; found on some enlarger accessories. |
FILTER | |
Filter thread on some vintage compact cameras. |
FILTER | |
Filter thread; also found on some microscope condensers and lab optical components. Yet another application is a Kiev-16U cine camera. |
FILTERMICROSCOPECINE | |
Standard thread for some Nikon microscope objectives (older series and BD-plan series). Also used on some Nikon microscope nosepieces and trinocular adapters. Do not confuse with M32.5×0.5 (enlarger Copal #0 thread). |
MICROSCOPE | |
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. |
ENLARGER | |
Filter thread on some compact cameras and binoculars. |
FILTER | |
Filter thread on some vintage cameras and binoculars. |
FILTER | |
Filter thread found on some compact cameras. |
FILTER | |
Filter thread on some cameras, notably some Konica models. |
FILTER | |
Filter thread on various cameras; also found on some Leica accessories. |
FILTER | |
Thread on some older enlarger lenses and optical accessories. |
FILTER | |
Filter thread on some compact cameras, notably some Olympus Stylus/μ series models. |
FILTER | |
Filter thread found on some vintage cameras and specialty optics. |
FILTER | |
Filter thread on some vintage cameras, including certain Leica models and some Voigtländer lenses. |
FILTER | |
Filter thread on some cameras and optics. |
FILTER | |
Filter thread; also used on some telescope accessories. |
FILTER | |
Found on some telescope eyepieces and photo accessories; also the front filter thread of some early Leica lenses. |
TELESCOPEFILTER | |
Thread on some telescope accessories, notably used by Baader Planetarium for some 1.25" eyepiece adapters. |
TELESCOPE | |
Filter thread found on some cameras, notably early Leica M lenses and some Voigtländer Bessa models. |
FILTER | |
Beastgrip Pro phone cage. |
SMARTPHONE | |
Filter thread on some cameras; found on some enlarger lens accessories. |
FILTER | |
Filter/accessory thread; also seen on some enlarger lenses. |
FILTER | |
Found on some enlarger lenses and photo accessories. |
ENLARGER | |
Uncommon thread on some enlarger or specialty optical equipment. |
ENLARGER | |
Filter thread for Leica M lenses and some rangefinder camera lenses with 39mm front diameter. |
FILTER | |
Filter thread used on some Soviet camera lenses (e.g. Industar, Jupiter series) and some enlarger lenses. Not to be confused with LTM (M39×1/26tpi). |
FILTERCAMERA | |
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. Note: LTM pitch is 26 tpi (≈0.977mm) not a true metric 1mm pitch, but the difference is negligible for short threads. |
CAMERAENLARGER | |
Uncommon specialty thread found on some vintage Soviet and Eastern European optical equipment. |
CAMERA | |
Filter thread on some cameras. |
FILTER |
Filter thread on some cameras; also found on some enlarger lenses (front thread of some Schneider Componon-S models). |
FILTER | |
Found on some vintage cameras and optical accessories. |
CAMERA | |
Filter thread on some cameras; front thread of some Schneider enlarger lenses. |
FILTER | |
Front thread of many popular enlarger lenses: Schneider Componon-S 100mm, some El-Nikkor versions. Also filter thread on some compact cameras (Olympus). |
ENLARGERFILTER | |
Found on some vintage cameras and accessories. |
CAMERA | |
Thread used on some telescope focuser draw tubes and astro accessories. |
TELESCOPE | |
T-mount / T2 — universal standard for astrophotography, introduced by Tamron in the late 1950s. Used on almost all telescope camera adapters, reducers, flatteners, and off-axis guiders. Also used on microscope phototube adapters. Not compatible with M42×1 despite the same diameter. |
TELESCOPEMICROSCOPE | |
The most widely used camera lens thread in history. Also called Pentax screw mount, Praktica thread, or Universal mount. Used on: Zenit SLRs (USSR/Russia), Praktica cameras (East Germany), Pentax Spotmatic, Fujica, Yashica, Ricoh, and hundreds of lens manufacturers worldwide. Still in use by KMZ (Cosina/Voigtländer). Also the standard thread for most enlarger lensboards and bellows extension tubes. |
CAMERAENLARGER | |
Filter thread used on some cameras, including some Minolta and Konica models. |
FILTER | |
Filter thread on various cameras; also front thread on some Schneider Componon-S enlarger lenses. |
FILTERENLARGER | |
Filter thread on some cameras and accessories. |
FILTER | |
Filter thread on some vintage cameras. |
FILTER | |
Filter thread on some cameras. |
FILTER | |
Filter thread on some cameras, including some Canon and Nikon compact models. |
FILTER | |
Filter thread on some vintage cameras. |
FILTER | |
Filter thread on various cameras; also found on some enlarger lenses. |
FILTER | |
Front/rear thread on some enlarger lenses; also found on some camera accessories. |
ENLARGER | |
Filter thread on some cameras. |
FILTER | |
Uncommon filter thread found on some cameras. |
FILTER | |
Filter thread on some vintage cameras and Soviet lenses. |
FILTER | |
Filter thread on some cameras and accessories. |
FILTER | |
Filter thread on some cameras; also on some telescope focuser accessories. |
FILTER | |
"Wide T-thread" — increasingly popular in astronomy as a larger alternative to T2. Found on modern telescope focuser drawtubes, reducers, and astro camera accessories. Also a common 2" telescope accessory thread. |
TELESCOPEFILTER | |
Very common filter thread — used by many Canon, Nikon, Sony, and third-party lenses (e.g. Canon EF 50mm f/1.8 STM, many 18-55mm kit lenses, various Nikon primes). Probably the most frequently encountered filter size in everyday photography. |
FILTER | |
Filter thread on some cameras and lenses. |
FILTER | |
Filter thread on some vintage cameras and lenses, including certain Leica models. |
FILTER |
Rear mount thread for some medium-format enlarger lenses: El-Nikkor 135mm A, 150mm A (in the convertible version), some Rodagon lenses. Also front thread of some longer enlarger lenses. |
ENLARGERFILTER | |
Filter thread on some cameras and lenses. |
FILTER | |
Filter thread on some cameras and lenses, including certain Sigma and Tamron models. |
FILTER | |
Very common filter thread — found on many Nikon, Pentax, and Soviet lenses. Nikon uses 52mm filters on many classic primes (50mm f/1.4, 50mm f/1.8, 28mm f/2.8 etc). Also the rear thread on El-Nikkor 50mm and 80mm enlarger lenses. |
FILTERENLARGER | |
Found on some telescope accessories; also used on helicoid focusing adapters for macro photography. |
FILTERTELESCOPE | |
Filter thread on some lenses and accessories. |
FILTER | |
Filter thread on some lenses; used by some Pentax medium-format lenses. |
FILTER | |
Filter/accessory thread; also found on some telescope focusers. |
FILTER | |
Filter thread on some cameras and lenses. |
FILTER | |
Filter thread on many cameras and lenses; common on various Canon, Nikon, and Pentax models. |
FILTER | |
Filter thread on some cameras. |
FILTER | |
Filter thread on some cameras and lenses. |
FILTER | |
Filter thread on some cameras; front thread on some Schneider Componon-S 100mm (older variant) and Rodenstock Rodagon enlarger lenses. |
FILTERENLARGER | |
Found on some larger enlarger lenses (Schneider) and some telescope accessories. |
ENLARGER | |
Filter thread on some cameras and lenses. |
FILTER | |
Filter thread on some cameras and lenses. |
FILTER | |
Filter thread on some cameras. |
FILTER | |
Common filter thread on many lenses. Also used as the telescope focuser thread on many astro accessories (equivalent function to T2 but for larger-aperture drawtubes). Found on Nikon 50mm f/1.4 AI, various Nikkor lenses, and some Soviet lenses. |
FILTERTELESCOPE | |
Found on some telescope drawtubes and larger astro accessories. |
TELESCOPE | |
Filter thread on some cameras and lenses. |
FILTER |
Filter thread on some cameras and lenses; also found on some telescope accessories and larger-aperture focuser tubes. |
FILTERTELESCOPE | |
Filter thread on some cameras and lenses; found on some telescope accessories. |
FILTER | |
Filter/accessory thread; found on some telescope focusers and larger cameras. |
FILTER | |
Found on some telescope focuser drawtubes and accessories. |
TELESCOPE | |
Very common filter thread on larger lenses. Found on many zoom and telephoto lenses from Nikon, Pentax, and Tamron (e.g. 70-210mm zooms). Standard thread for many 62mm filters. |
FILTER | |
Found on some telescope accessories and some Hasselblad accessories (B62 filter mount). |
TELESCOPEFILTER | |
Thread found on some telescope focusers, notably certain older Vixen and Takahashi refractors. |
TELESCOPE | |
Found on some telescope accessories and larger optical systems. |
TELESCOPE | |
Filter/accessory thread on some cameras and telescopes. |
FILTER | |
Filter thread on some cameras and lenses; found on some Minolta medium-format lenses. |
FILTER | |
Found on some telescope focuser drawtubes (older Celestron and Meade accessories). |
TELESCOPE | |
Thread used on some telescope focusers, particularly some Sky-Watcher and Orion refractors. |
TELESCOPE | |
Found on some larger telescope focuser assemblies. |
TELESCOPE | |
Imperial-pitch thread found on some older telescope focusers. |
TELESCOPE | |
Filter thread on some larger lenses; also found on some telescope accessories. |
FILTER | |
Filter thread on some cameras and lenses. |
FILTER | |
Common filter thread on larger telephoto and zoom lenses. Found on many Sigma, Tamron, and Canon zoom lenses. Standard for 67mm filters. |
FILTER | |
Found on some telescope accessories and some camera equipment. |
TELESCOPE | |
Filter thread on some cameras and lenses. |
FILTER | |
Filter thread on some cameras and lenses; found on some telescope accessories. |
FILTER | |
Found on some telescope focusers and accessories. |
TELESCOPE | |
Filter/accessory thread on some cameras and telescope equipment. |
FILTER |
Filter/accessory thread on some larger lenses and telescope accessories. |
FILTER | |
Found on some telescope accessories and camera equipment. |
TELESCOPE | |
Common filter thread on larger telephoto lenses. Found on many Nikon and Canon telephoto primes and zooms, some medium-format lenses. Standard for 72mm filters. |
FILTER | |
Found on some telescope focuser drawtubes and accessories (notably used on some Takahashi refractors). |
TELESCOPE | |
Filter/accessory thread found on some cameras and telescope equipment. |
FILTER | |
Filter thread on some cameras and lenses. |
FILTER | |
Filter/accessory thread; found on some telescope accessories and larger cameras. |
FILTERTELESCOPE | |
Filter/accessory thread; found on some telescope accessories. |
TELESCOPE | |
Very common filter thread on professional telephoto and zoom lenses. Found on many Canon L-series lenses, Nikon AF-S telephotos, Sigma Art lenses, and numerous others. One of the most widely-used large filter sizes. |
FILTER | |
Filter thread on some lenses; found on some Hasselblad medium-format accessories. |
FILTER |
Filter/accessory thread on large lenses and telescope equipment. |
FILTER | |
Found on some telescope focuser drawtubes and larger optical components. |
TELESCOPE | |
Common filter thread on large telephoto lenses. Found on Canon 16-35mm f/2.8L, some Sigma and Tokina wide-angle lenses. Standard for 82mm filters. |
FILTER | |
Found on some telescope accessories and large optics. |
TELESCOPE | |
Filter/accessory thread on some lenses and telescope equipment. |
FILTER | |
Filter thread on some larger professional lenses. |
FILTER | |
Found on some larger telescope accessories and professional camera equipment. |
TELESCOPE | |
Filter thread on some professional telephoto lenses; also on some telescope accessories. |
FILTER | |
Found on some telescope focuser assemblies and large optical equipment. |
TELESCOPE | |
Filter/accessory thread on some large lenses and telescope equipment. |
FILTER | |
Filter thread on some large professional lenses. |
FILTER | |
Found on some large telescope accessories and professional lenses. |
TELESCOPE |
Found on some large telescope drawtube assemblies and professional optical equipment. |
TELESCOPE | |
Found on some telescope focuser drawtubes, notably some William Optics refractors. |
TELESCOPE | |
Thread found on some large telescope accessories. |
TELESCOPE | |
Thread found on some large telescope accessories. |
TELESCOPE | |
Found on some large telescope accessories and professional optical instruments. |
TELESCOPE | |
Found on some large telescope drawtube assemblies; used by some Celestron SCT accessories. |
TELESCOPE | |
Found on some large telescope accessories and professional optical systems. |
TELESCOPE | |
Found on some large telescope accessories. |
TELESCOPE |
Very large thread used on large-aperture telescope focusers and accessories. |
TELESCOPE | |
Found on some large telescope drawtube assemblies and accessories. |
TELESCOPE | |
Large telescope focuser thread; also filter thread on some super-telephoto lenses (Canon, Nikon 500mm+ primes). |
TELESCOPEFILTER | |
Found on some very large telescope accessories. |
TELESCOPE | |
Found on some large telescope accessories. |
TELESCOPE | |
Found on some very large telescope accessories and professional astronomical equipment. |
TELESCOPE | |
Very large thread on large-aperture telescope accessories. |
TELESCOPE | |
Found on some very large telescope drawtube assemblies. |
TELESCOPE | |
Found on some large telescope accessories. |
TELESCOPE | |
Found on some large telescope accessories. |
TELESCOPE | |
Found on some very large telescope accessories and professional astronomical equipment. |
TELESCOPE | |
Found on some very large telescope accessories. |
TELESCOPE | |
Very large telescope thread; used on some Schmidt-Cassegrain accessories and large refractors. |
TELESCOPE | |
Very large thread found on some large-aperture telescope accessories. |
TELESCOPE | |
Very large telescope thread found on some large-aperture refractor focusers and observatory equipment. |
TELESCOPE |
Same thread as C-mount (1"×32tpi) but with a shorter 12.526mm flange focal distance. Used on security cameras, CCTV, and some industrial cameras. CS-mount cameras can accept C-mount lenses via a 5mm spacer. |
CCTV | |
Standard mount for industrial cameras, machine vision cameras, CCTV, and cine cameras since the 1930s. Also used on many microscope camera adapters (trinocular phototubes) and some scientific cameras. Thread: 1 inch (25.4mm) × 32 TPI, flange distance 17.526mm. |
CCTVMICROSCOPE | |
Standard for 8mm and 16mm cine cameras and some early video cameras. Thread: 15.88mm × 32 TPI, flange distance 12.29mm. Used in Kodak 8mm cameras, Bolex 8mm, and some early TV lenses. Now used with adapter rings on mirrorless cameras. |
CINE | |
Royal Microscopical Society standard — the universal microscope objective thread since the 19th century. Thread: 20.32mm × 36 TPI. Used by Olympus and Zeiss on their finite-conjugate objectives; also on many older Nikon objectives and virtually all "DIN" standard objectives from Leitz, American Optical, and others. |
MICROSCOPE | |
Standard for Schmidt-Cassegrain telescope (SCT) back-cell threads. Used on Celestron and Meade SCTs to attach visual backs, reducers, and camera adapters. Thread: 2 inch × 24 TPI. |
TELESCOPE | |
Thorlabs SM1 thread — a common standard for laboratory and photonics optomechanics. Used extensively in Thorlabs cage systems, tube lens assemblies, and microscopy research setups. Thread: 1.035 inch × 40 TPI. |
MICROSCOPETELESCOPE | |
Thorlabs intermediate thread standard for larger optical tube assemblies. |
MICROSCOPE | |
Thorlabs SM2 thread for larger cage system components and larger-format optical systems. Thread: 2.035 inch × 40 TPI. |
MICROSCOPETELESCOPE | |
Thorlabs SM3 thread for the largest cage system components. Thread: 3.035 inch × 40 TPI. |
MICROSCOPE | |
Thread found on some older telescope accessories with imperial pitch. |
TELESCOPE | |
Thread found on some telescope accessories with imperial pitch, notably some older Zeiss and Baader accessories. |
TELESCOPE |











