Lenses · Lens accessories

Lens accessories: adapters, rings, polarizers

The small parts without which optics will not meet the camera. Adapter rings join different mounts — M42, M58, M72 to C-mount and F-mount. C-C extension rings shorten the minimum object distance when a part has to be imaged larger. Linear polarizers suppress specular glare — primarily from glass, film and plastic; on metal they only help in a cross-polarized lighting setup.

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Hikrobot Lens accessories: adapters, rings, polarizers

Part numbers and versions

Adapters and extension rings

Part numberPNThreadThickness
Adapter C-C T10102201857C-mount to C-mount10 mm
Adapter C-C T5310100686C-mount to C-mount5 mm
Adapter, C-C T20102201848C-mount to C-mount20 mm
V004-C Transfer190400547M42 × 1.0 to C-mount5.5 mm
V004-X CAMERA CS Adapter190401513M42 × 1.0 to CS-mount1 mm
lens Adapter M42x1.0-F T34.5102201946M42 × 1.0 to F-mount34.5 mm
lens Adapter M72x1.0-F T36.4102202129M72 × 0.75 to F-mount36.4 mm
lens adapter, M58x0.75-C T6.02102201274M58 × 0.75 to C-mount6.02 mm
lens adapter, M58x0.75-F T35102201275M58 × 0.75 to F-mount35 mm
lens adapter, M72xF190405111M72 × 0.75 to F-mount34.5 mm

Linear polarizers

Part numberPNThreadThickness
Linear Polarizer PL270-1102201574M27 × 0.58 mm
Linear Polarizer PL305-3102204558M30.5 × 0.58 mm
Linear Polarizer PL355-2102200454M35.5 × 0.58 mm
Linear Polarizer PL405-1102200461M40.5 × 0.58 mm
Linear Polarizer PL430-2102200531M43 × 0.58 mm
Polarizer PL-M37mm*P0.5102204526M37 × 0.58 mm

Shim washers

Part numberPNThreadThickness
LENS MAT-D33d26t1190401027C-mount to C-mount1 mm
Lens Washer-D33d26t2190400763C-mount to C-mount2 mm

How to choose

An adapter is chosen by the pair of mounts and by thickness: it counts towards the flange distance, and an extra millimetre shifts focus. A polarizer is chosen by the lens front thread (M27, M30.5, M35.5, M37, M40.5, M43) — listed in the lens specification as filter thread.

FAQ

How is the correct mount adapter identified?

Match both interfaces, not just the lens-side thread. The range includes M42 × 1.0 to C-mount, CS-mount, or F-mount; M58 × 0.75 to C-mount or F-mount; and M72 × 0.75 to F-mount. Then include the stated adapter thickness in the flange-distance check.

What changes when a C-to-C extension ring is added?

A C-to-C extension ring shortens the minimum object distance so the part can be imaged larger. Listed ring lengths are 5, 10, and 20 mm. Because the added spacing changes the optical position, focus must be considered with the chosen ring in place.

Which lens dimension determines polarizer size?

Use the lens front filter thread. The linear-polarizer choices match M27, M30.5, M35.5, M37, M40.5, and M43 threads, all shown with a 0.5 pitch. The camera or rear lens mount does not identify the required front polarizer.

For which surfaces are the linear polarizers intended?

The stated use is suppression of specular glare, primarily from glass, film, and plastic. On metal, the polarizer helps only in a cross-polarized lighting setup, so the lighting-side polarization arrangement is part of that application.

When would a shim washer be considered instead of an extension ring?

The shim-washer group provides C-mount to C-mount spacing at 1 and 2 mm. The extension-ring group provides larger 5, 10, and 20 mm C-to-C spacing and is associated with shortening minimum object distance. Choose according to the required spacing change.

Typical applications