SLR lens mount

Contax/Yashica (C/Y) mount

Everything about the Contax/Yashica (C/Y): flange focal distance, native lenses, cameras and which adapters keep infinity focus.

45.50 mm

Flange focal distance

48.0 mm

Throat diameter

1974

Introduced

SLR

System type

Lenses in our database

Mount facts#

Home of the Carl Zeiss T* manual lenses for Contax and Yashica SLRs.

1 native lenses, widest to longest.

Lens	Focal	Aperture	Format	Type
Zeiss Carl Zeiss Sonnar T* 180mm f/2.8 MMJ	180 mm	f/2.8	Full frame	Telephoto prime

Adapter	Possible?	Flange gap
Contax/Yashica (C/Y) → Sony E-mount	Yes · manual	+27.50 mm
Contax/Yashica (C/Y) → Canon RF	Yes · manual	+25.50 mm
Contax/Yashica (C/Y) → Nikon Z	Yes · manual	+29.50 mm
Contax/Yashica (C/Y) → Fujifilm X-mount	Yes · manual	+27.80 mm
Contax/Yashica (C/Y) → Micro Four Thirds	Yes · manual	+26.25 mm
Contax/Yashica (C/Y) → L-Mount	Yes · manual	+25.50 mm
Contax/Yashica (C/Y) → Canon EF-M	Yes · manual	+27.50 mm
Contax/Yashica (C/Y) → Fujifilm G-mount	Yes · manual	+18.80 mm
Contax/Yashica (C/Y) → Hasselblad XCD	Yes · manual	+27.36 mm
Contax/Yashica (C/Y) → Nikon 1 (CX)	Yes · manual	+28.50 mm
Contax/Yashica (C/Y) → Pentax Q	Yes · manual	+36.30 mm
Contax/Yashica (C/Y) → Samsung NX	Yes · manual	+20.00 mm
Contax/Yashica (C/Y) → Canon EF	Yes · manual	+1.50 mm

A lens can be adapted with simple tube spacers when its flange distance is longer than the camera's. With 45.50 mm, Contax/Yashica (C/Y) lenses can in principle go on bodies with shorter flanges such as Praktica B, Canon EF, Canon EF-S, Sigma SA, M39x1, Kiev Automat. Bodies with this mount can take lenses from longer-flange systems such as Leica R, KMZ Zenit DKL-mount, Contax N, Tamron Adaptall, Arri PL, Leica S, T-mount (T2), Mini T-mount.

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