Adapter · Contax/Yashica to Canon RF adapter
Contax/Yashica (C/Y) lenses on Canon RF
A Contax/Yashica (C/Y) lens was built to sit 45.5 mm from the film. A Canon RF camera's mount sits 20 mm from its sensor, so an adapter 25.50 mm deep puts the lens back where it was designed to be, and it focuses from close up to infinity with no glass in between.
- Contax/Yashica flange
- 45.5 mm
- Canon RF flange
- 20 mm
- Adapter depth
- 25.50 mm
What the adapter has to do
Zeiss C/Y lenses come in AE and later MM versions, and both fit a C/Y adapter. MM adds a setting that lets a Contax body choose the aperture, which an adapter can't use, so you set the aperture on the ring with either kind. Make sure the listing says C/Y or Contax/Yashica, since lenses for Kyocera's Contax N cameras use a different mount.
Search “Contax/Yashica to Canon RF adapter” on eBay ↗eBay searchSet up your Canon RF camera
- 01Set Release shutter w/o lens to Enable in the Custom Functions menu. On Disable the camera won't fire on a plain adapter, and in-body stabilization stays off.
- 02On bodies with in-body stabilization, set IS mode to On and enter the lens's focal length, from 1 to 1000mm.
- 03Turn on MF peaking settings in the AF menu.
- 04Press the magnify button to zoom in and check focus.
What each lens becomes
On a full-frame Canon RF body these lenses frame just as they did on film. On a smaller sensor the frame is cropped, so each lens frames like a longer one. The f-number still sets exposure, while the depth of field looks like the larger number shown.
| Lens | On 35mm film | APS-C (1.6×) |
|---|---|---|
| Contax Planar T* 50mm f/1.4 | 50mm f/1.4 | 80mm f/2.2 |
| Contax Planar T* 50mm f/1.7 | 50mm f/1.7 | 80mm f/2.7 |
| Contax Planar T* 85mm f/1.4 | 85mm f/1.4 | 136mm f/2.2 |
| Contax Distagon T* 28mm f/2.8 | 28mm f/2.8 | 45mm f/4.5 |
| Contax Distagon T* 35mm f/2.8 | 35mm f/2.8 | 56mm f/4.5 |
| Contax Sonnar T* 135mm f/2.8 | 135mm f/2.8 | 216mm f/4.5 |
| Contax Tessar T* 45mm f/2.8 | 45mm f/2.8 | 72mm f/4.5 |
The Contax/Yashica lenses we cover
Contax · Contax/Yashica (C/Y)
Contax Planar T* 50mm f/1.4
From 1975
$280–$410 typical ask
154 on eBay
Contax · Contax/Yashica (C/Y)
Contax Planar T* 50mm f/1.7
From about 1979
$200–$260 typical ask
35 on eBay
- 85mm f/1.4
Contax · Contax/Yashica (C/Y)
Contax Planar T* 85mm f/1.4
From 1975
$430–$600 typical ask
161 on eBay
- 28mm f/2.8
Contax · Contax/Yashica (C/Y)
Contax Distagon T* 28mm f/2.8
From about 1976
$290–$420 typical ask
135 on eBay
- 35mm f/2.8
Contax · Contax/Yashica (C/Y)
Contax Distagon T* 35mm f/2.8
From 1975
$260–$360 typical ask
89 on eBay
- 135mm f/2.8
Contax · Contax/Yashica (C/Y)
Contax Sonnar T* 135mm f/2.8
From about 1976
$170–$230 typical ask
134 on eBay
- 45mm f/2.8
Contax · Contax/Yashica (C/Y)
Contax Tessar T* 45mm f/2.8
From about 1983
$310–$430 typical ask
63 on eBay
Contax/Yashica lenses on other cameras
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