Comparison
Canon FD 50mm f/1.4 S.S.C. vs Pentax SMC Pentax-M 50mm f/1.4
The Canon FD 50mm f/1.4 S.S.C. is a 50mm f/1.4 Canon FD lens made 1971-1990s, valued at $55 to $200 used. The Pentax SMC Pentax-M 50mm f/1.4 is a 50mm f/1.4 Pentax K lens made 1977-1984, valued at $60 to $210 used.
Specifications side by side
| Specification | Canon FD 50mm f/1.4 S.S.C. | Pentax SMC Pentax-M 50mm f/1.4 |
|---|---|---|
| Focal length | 50 mm | 50 mm |
| Maximum aperture | f/1.4 | f/1.4 |
| Native mount | Canon FD | Pentax K |
| Production years | 1971-1990s | 1977-1984 |
| Optical design | 7 elements / 6 groups, Double Gauss | 7 elements / 6 groups, Double Gauss |
| Typical used value | $100 | $110 |
| Value range | $55 to $200 | $60 to $210 |
| Adapts to | Sony E, Fuji X, MFT, Canon RF, Nikon Z, L-mount | Sony E, Fuji X, MFT, Canon RF, Nikon Z, L-mount |
What actually differs
- Both open to f/1.4, so neither has a speed advantage.
- The Canon FD 50mm f/1.4 S.S.C. is cheaper. Typical used value is $100 against $110, a gap of $10. Ranges: $55 to $200 versus $60 to $210.
- Both are 50mm lenses, so framing is identical on the same sensor.
- The Canon FD 50mm f/1.4 S.S.C. is the older design; production began around 1971 against 1977 for the Pentax SMC Pentax-M 50mm f/1.4 (1971-1990s versus 1977-1984).
- They use different mounts, Canon FD and Pentax K, so each needs its own adapter. Both reach infinity on mirrorless bodies with a plain mechanical adapter.
- Both use 7 elements in 6 groups.
Which one to buy
On the catalog data the Canon FD 50mm f/1.4 S.S.C. wins on the $10 lower typical price, and the Pentax SMC Pentax-M 50mm f/1.4 gives up nothing measurable in return except its own rendering, described below. Condition and variant matter more than the spec sheet at these prices.
Minimum focus distance, weight, and measured sharpness are not in the catalog, so this comparison does not claim anything about them.