The Carl Zeiss Planar 1,4/50 with C/Y mount is a typical representative of the 1.4/50 mm
- Diameter: 62.5mm
- Length: 41mm
- Weight: 290g
- Filter Diameter: 55mm
- Number of Aperture Blades: 6
- Elements/Groups: 7/6
- Close Focusing Distance: 45cm
- Mount: Zeiss C/Y
More information in Zeiss’ official data sheet.
The younger MM version usually sells for a little bit more than the older AE version.