Serenar 50mm f/3.5 I
| Marketed | December 1945 |
| Original Price | sold overseas only |
| Lens Construction (group) | 3 |
| Lens Construction (element) | 4 |
| No. of Diaphragm Blades | -- |
| Minimum Aperture | 16 |
| Closest Focusing Distance (m) | 1 |
| Maximum Magnifcation (x) | -- |
| Filter Diameter (mm) | -- |
| Maximum Diameter x Length (mm) | 47 x 33.8 |
| Weight (g) | 170 |
This is the first lens manufactured by Canon. A standard lens for popular type rangefinder camera, the Canon J, marketed in the spring of 1939. The thread mount of 24 screw thread per inch with 1.058mm pitch was used instead of Leica specification, popular at the time.
