Description, Notes & Specifications
| Manufactured: | 1962—1965 |
|---|---|
| Camera Mount: | M42x1 |
| Lens Elements / Groups: | 6 / 5 |
| Diaphragm Type: | automatic / manual |
| Diaphragm Blades: | — |
| Angle of View: | 43° |
| Maximum Aperture: | f/2 |
| Minimum Aperture: | f/16 |
| Minimum Focus Distance: | 0·45 metres |
| Magnification Factor: | — |
| Filter Size: | ø 49 mm (screw) |
| Length: | — |
| Largest Diameter: | — |
| Weight: | — |
| Product Numbers: | 345-1 345-6 345-3 |
| Serial Number Range: | — |
| My Serial Number: | 1142927 |
Distance engravings in yellow (metres) and blue (feet); “1:2/55” on front bezel and the digits on the diaphragm ring in yellow.
Mark IA: Product number 345-1.
Mark IB: Product number 345-6; discontinued 10/1963.
Mark IC: Product number 345-3; introduced 10/1963.
Variations: Diaphragm ring rotates counter-clockwise and can go beyond f/2 to (unmarked) f/1·8, later clockwise and stops at f/2; A/M lever with manual at top; changes in the colour of the coating from purple-blue to pink-blue.
Review
Recommended: Not Tested
References
- van Oosten, G. 1999. The Ultimate Asahi Pentax Screw Mount Guide. Uitgeverij Jansz.