Adapter guide
Minolta SR lenses on MFT
Yes, this works. Minolta SR has a 43.5mm flange distance and Micro Four Thirds has 19.25mm, so a 24.25mm mechanical adapter with no glass fills the gap and infinity focus is preserved. Focus and aperture stay manual.
- Minolta SR flange
- 43.5 mm
- MFT flange
- 19.25 mm
- Adapter thickness
- 24.25 mm
- Optical elements
- None required
Setting it up
Enable Shoot w/o Lens (Panasonic) or leave Release Priority on (Olympus and OM System), then enter the focal length for in-body stabilisation. The 2x crop doubles the apparent focal length, so a 50mm frames like a 100mm.
Automatic diaphragm. SR lenses default to the set aperture when off the body, so the aperture ring works directly on an adapter.
Minolta SR lenses and their field of view on MFT
Effective focal length changes with sensor size. The lens itself does not change; the smaller sensor simply captures a narrower part of the image circle.
| Lens | Focal length | Aperture | Frames like (Four Thirds (2x)) | Years | Used value |
|---|---|---|---|---|---|
| Minolta MC Rokkor-PF 55mm f/1.7 | 55mm | f/1.7 | 110mm | 1968-1973 | $30 to $120 |
| Minolta MC Rokkor-PF 58mm f/1.4 | 58mm | f/1.4 | 116mm | 1958-1970s | $70 to $260 |
| Minolta MC Rokkor-PG 58mm f/1.2 | 58mm | f/1.2 | 116mm | 1966-1973 | $300 to $850 |
| Minolta MD Rokkor 50mm f/1.4 | 50mm | f/1.4 | 100mm | 1977-1984 | $45 to $170 |
Frequently asked
Do Minolta SR lenses work on MFT cameras?
Yes. A plain Minolta SR to MFT adapter works with no optics. Minolta SR has a 43.5mm register and Micro Four Thirds has a 19.25mm register, so the adapter is a 24.25mm tube that puts the lens exactly where a Minolta SR body would. Plain adapter ring, no mechanism needed. MC and MD lenses share the same bayonet and mount identically.
Do Minolta SR lenses focus to infinity on MFT?
Yes. Because the adapter restores the native 43.5mm register, infinity focus is preserved and the full focus scale on the lens stays accurate. Adapters machined slightly short let the lens focus past infinity by a small margin, which is harmless; adapters machined long stop short of infinity, so buy from a maker with tight tolerances.
What focal length does a Minolta SR lens become on MFT?
On Four Thirds (2x) MFT bodies (Lumix G, GH, GX; OM-D and PEN; OM-1 and OM-5) a 55mm lens frames like a 110mm lens on full frame; the aperture and depth of field at a given distance do not change.
More on this mount: Minolta SR mount reference