Lens thread

Lens or screw threads are standardized, manufacturer-independent lens connections for interchangeable lenses in the field of photo technology .

The M39 , M40 and M42 screw threads are the forerunners of the bayonet connectors commonly found on the market today and were manufactured until the 1970s. The M42 thread in particular still offers inexpensive access to analogue SLR photography with high-quality optics, which are usually more expensive for other connections (new and used).

In the USA , the T2 connection plays a similar role as M42 in Europe. Other standardized thread connections are the C-Mount and the CS-Mount .

The S-Mount connection with an M12 × 0.5 fine thread is a dominant standard for (inexpensive) circuit board cameras .

See also

• Filter thread
• Fine thread (mostly for eyepieces)
• RMS thread : Previously also used for photo lenses (e.g. Macro-Nikkor), today only common for microscope lenses

Web links

• Thread in the photo area thread standards