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Ultra-thin 4.5mm aluminium M42-FX lens adapter ring

Ruth's sister

Ruth's sister M42-FX Lens Adapter Ring 4.5mm internal power cable

SKU CH-65PA-A0RBJ

A 4.5 mm aluminium adapter lets M42 large-format or enlarging lenses mount on Fujifilm X-Pro and X-E series mirrorless cameras without infinity focus or electronic functions

  • Enables M42 large-format lenses on Fujifilm X mirrorless cameras
  • Ultra-thin 4.5 mm aluminium construction keeps the optical path short
  • Manual focus and aperture control only — no electronic communication
  • Compatible with X-Pro1, X-Pro2, X-T1, X-T2 and other listed X-series models
  • Single adapter ring included for direct lens-to-camera mounting

M42-FX Lens Adapter for Fujifilm X-Series

This aluminium adapter ring lets photographers attach M42 mount large-format or enlarging lenses to Fujifilm X-Pro1, X-Pro2, X-M1, X-A1, X-A2, X-A3, X-A10, X-E1, X-E2, X-E2s, X-T1, X-T2 and X-T10 mirrorless bodies. It is designed specifically for lenses that lack their own focusing mechanism.

Mechanical Constraints of the Adapter

The ring measures 4.5 mm thick and adds no optical elements, so infinity focus cannot be reached when the lens is used directly. Automatic diaphragm control and autofocus are not supported, meaning exposure and focus must be set manually on every shot.

Build Quality and Daily Handling

The all-metal construction keeps the adapter rigid while adding minimal bulk to the camera front. Its slim profile sits flush with the lens mount, reducing the risk of vignetting, though the lack of electronic contacts means the camera will not record lens metadata or provide focus confirmation.

Highlights

  • Enables M42 large-format lenses on Fujifilm X mirrorless cameras
  • Ultra-thin 4.5 mm aluminium construction keeps the optical path short
  • Manual focus and aperture control only — no electronic communication
  • Compatible with X-Pro1, X-Pro2, X-T1, X-T2 and other listed X-series models
  • Single adapter ring included for direct lens-to-camera mounting

Specifications

No published specifications for this item yet.

Questions about this item

Which thickness of adapter ring should I choose for my M42 lens on an X-Pro2?

The ring is 4.5 mm thick, an ultra-thin profile that keeps the lens close to the sensor while still allowing the focusing tube to engage.

What does the 4.5 mm thickness mean once the adapter is mounted on my X-T2?

It positions the M42 lens just 4.5 mm from the camera flange, preserving the short flange distance of the X mount so the focusing tube can reach infinity.

Does the M42-FX adapter ring support electronic communication or autofocus with my X-E2?

No, the adapter is purely mechanical; automatic diaphragm, autofocus and any other electronic functions will not operate while using it.

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