Lens adapter compatibility

M39 / LTM (Leica thread) lenses on Fujifilm G-mount cameras

Can you use M39 / LTM (Leica thread) lenses on Fujifilm G-mount cameras? Yes, with a simple mechanical adapter (manual focus). The M39 / LTM (Leica thread) flange distance is 28.80 mm and Fujifilm G-mount is 26.70 mm, a difference of +2.10 mm.

+2.10 mm

Space for the adapter

28.80 mm

M39 / LTM (Leica thread) flange

26.70 mm

Fujifilm G-mount flange

Verdict: Yes — a simple 2.1 mm adapter keeps infinity focus.

What to expect#

Aperture control: these are mechanical lenses with aperture rings — set the aperture on the lens and shoot in aperture-priority or manual.

Focus: use focus peaking and magnification in the viewfinder. Exposure metering works normally because the camera meters through the lens at working aperture.

Fujifilm G-mount cameras#

Other systems for M39 / LTM (Leica thread) lenses#

Sony E-mount Canon RF Nikon Z Fujifilm X-mount Micro Four Thirds L-Mount Canon EF-M Hasselblad XCD Nikon 1 (CX)Pentax Q

Frequently asked questions#

Will M39 / LTM (Leica thread) lenses autofocus on Fujifilm G-mount?

No — adapted lenses are manual focus on this combination.

Does a M39 / LTM (Leica thread) to Fujifilm G-mount adapter affect image quality?

A glass-free adapter is just a precisely machined spacer, so image quality is unchanged when it is built to the right thickness. Cheap adapters can be slightly too thin or thick, which shifts the infinity mark.

Last updated October 03, 2026 · How we calculate · Sources