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Lens mount Threads |
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In photography a standardized adaption
device for the changing of lenses which works independent
from the manufacturer is called screw thread or lens thread.
Screw threads are the forerunners of the bayonet connectors,
which dominate the market nowadays. Screw threads were mainly
used upto the 1980s. However, the M42-screw thread still offers
a low-priced alternative to the analoguos mirror reflex camera
with high-quality lenses. |
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M39-Screw Thread M39 x 26Gg |
The M39-Screw Thread - also called
Leica L-Mount - was used in miniature cameras since the 1930s.
Companies that offer these mounts are e.g. Leica, Voigtländer,
Canon and Ricoh. For this thread sporadically high-quality
lenses are still available today. |
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M40-Screw Thread |
| The
M40-Screw Thread is a quite rare thread. It was mainly used
in the 1930s. E.g. the Praktiflex and Praktiflex II of the brand
Praktika resp. Pentacon had this lens connection. Some CCD-camaras
still use the M40-thread nowadays. |
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M42-Screw Thread M42 x 1.0 |
| M42
is the term for a standardized screw thread that was used for
cameras of e.g. Praktica, Voigtländer, Fujica ST, Ricoh
and Pentax. M42 is the successor of the older M39-screw thread
and was developped in a time when the manufacturer's didn't
yet try to tie the users down to their own company's lens bayonets. |
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T2-screw thread M42 x 0.75 |
| T2
is an old Tamron standard. There are multiple adapters available
for T2, from T2 to other sizes and vice versa. For a number
of applications the T2-mount has become standard, e.g. for microscopes,
telescopes and slide duplicators. |
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C-Mount 1" x 32 TPI UN 2A |
| Standard
connection of lenses for CCD-cameras, with a standard mount
thread (at the lens: male thread 1"-32UN2A) with a standard
flange focal distance of 17.526 mm. |
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CS-Mount 1" x 32 TPI UN 2A |
| Is
equal to C-Mount apart from the standard flange focal. The CS-mount
has a flange focal distance of 12.5 mm. The CS-Mount standard
is the "younger" standard, which meets the demand
for shorter lengths. |
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Tripod
Threads |
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1/4" - 20 UNC |
| This
thread is used for rangefinder camera, roll film cameras (also
DSLRs) up to medium format cameras, quick release plates and
panoramic heads. |
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3/8" - 16 UNC |
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Some medium format cameras and almost all large size cameras
as well as most of the connectors between tripods and panoramic
heads use this thread. |
