© Robert I. Sadler, 2011
© Robert I. Sadler, 2011
Description, Notes & Specifications
| Manufactured: | 1959—1962 |
|---|---|
| Camera Mount: | M42x1 |
| Lens Elements / Groups: | 6 / 5 |
| Diaphragm Type: | semi-automatic / manual |
| Diaphragm Blades: | 10 / decagonal |
| Angle of View: | 43° |
| Maximum Aperture: | f/2 |
| Minimum Aperture: | f/22 |
| Minimum Focus Distance: | 0·55 metres |
| Magnification Factor: | — |
| Filter Size: | ø 46 mm (screw) |
| Length: | 32·5 mm / 40·5 mm |
| Largest Diameter: | 55 mm |
| Weight: | ≈175 grams |
| Product Number: | 341 / 34100 |
| Serial Number Range: | — |
| My Serial Number: | 291272 |
Distance engravings in yellow (metres) and blue (feet); no IR marker.
Variations: The front bezel reads either “Auto-Takumar 1:2 f=55mm” or “Auto-Takumar 1:2/55”.
The “f=55mm” lenses were sold with early cameras, like the S2/H2 models. The “/55” lenses were sold with later cameras, like the S1/H1 or the S2 Super.
Depth of Field Guide
| f/2 | f/2·5 | f/2·8 | f/3·5 | f/4 | f/4·5 | f/5·6 | f/6·7 | f/8 | f/9·5 | f/11 | f/16 | f/22 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0·55 | 0·54 | 0·56 | 0·54 | 0·56 | 0·54 | 0·56 | 0·54 | 0·56 | 0·54 | 0·56 | 0·54 | 0·56 | 0·53 | 0·57 | 0·53 | 0·57 | 0·53 | 0·57 | 0·52 | 0·58 | 0·52 | 0·58 | 0·51 | 0·60 | 0·49 | 0·62 |
| 0·60 | 0·59 | 0·61 | 0·59 | 0·61 | 0·59 | 0·61 | 0·59 | 0·61 | 0·59 | 0·61 | 0·58 | 0·62 | 0·58 | 0·62 | 0·58 | 0·62 | 0·57 | 0·63 | 0·57 | 0·63 | 0·56 | 0·64 | 0·55 | 0·66 | 0·53 | 0·69 |
| 0·70 | 0·69 | 0·71 | 0·69 | 0·71 | 0·69 | 0·71 | 0·68 | 0·72 | 0·68 | 0·72 | 0·68 | 0·72 | 0·67 | 0·73 | 0·67 | 0·73 | 0·66 | 0·74 | 0·66 | 0·75 | 0·65 | 0·76 | 0·63 | 0·79 | 0·61 | 0·82 |
| 0·80 | 0·79 | 0·81 | 0·78 | 0·82 | 0·78 | 0·82 | 0·78 | 0·82 | 0·78 | 0·83 | 0·77 | 0·83 | 0·77 | 0·84 | 0·76 | 0·84 | 0·75 | 0·85 | 0·74 | 0·86 | 0·74 | 0·88 | 0·71 | 0·92 | 0·68 | 0·97 |
| 0·90 | 0·88 | 0·92 | 0·88 | 0·92 | 0·88 | 0·92 | 0·87 | 0·93 | 0·87 | 0·93 | 0·87 | 0·94 | 0·86 | 0·95 | 0·85 | 0·96 | 0·84 | 0·97 | 0·83 | 0·98 | 0·82 | 1·00 | 0·79 | 1·05 | 0·75 | 1·12 |
| 1·00 | 0·98 | 1·02 | 0·98 | 1·03 | 0·97 | 1·03 | 0·97 | 1·04 | 0·96 | 1·04 | 0·96 | 1·05 | 0·95 | 1·06 | 0·94 | 1·07 | 0·93 | 1·09 | 0·91 | 1·10 | 0·90 | 1·12 | 0·86 | 1·19 | 0·82 | 1·28 |
| 1·20 | 1·17 | 1·23 | 1·16 | 1·24 | 1·16 | 1·24 | 1·15 | 1·25 | 1·14 | 1·26 | 1·14 | 1·27 | 1·12 | 1·29 | 1·11 | 1·31 | 1·09 | 1·33 | 1·08 | 1·36 | 1·06 | 1·38 | 1·01 | 1·49 | 0·95 | 1·64 |
| 1·50 | 1·46 | 1·55 | 1·44 | 1·56 | 1·44 | 1·57 | 1·42 | 1·58 | 1·41 | 1·60 | 1·40 | 1·61 | 1·38 | 1·64 | 1·36 | 1·67 | 1·34 | 1·71 | 1·31 | 1·75 | 1·28 | 1·80 | 1·21 | 1·99 | 1·12 | 2·26 |
| 2·00 | 1·92 | 2·09 | 1·90 | 2·11 | 1·89 | 2·12 | 1·87 | 2·16 | 1·85 | 2·18 | 1·83 | 2·20 | 1·79 | 2·26 | 1·76 | 2·32 | 1·72 | 2·39 | 1·67 | 2·49 | 1·63 | 2·59 | 1·50 | 2·98 | 1·38 | 3·65 |
| 3·00 | 2·82 | 3·20 | 2·78 | 3·25 | 2·76 | 3·29 | 2·71 | 3·37 | 2·67 | 3·43 | 2·63 | 3·49 | 2·55 | 3·63 | 2·48 | 3·79 | 2·40 | 4·00 | 2·31 | 4·26 | 2·23 | 4·56 | 2·00 | 5·98 | 1·78 | 9·54 |
| 5·00 | 4·53 | 5·58 | 4·42 | 5·75 | 4·36 | 5·86 | 4·23 | 6·12 | 4·13 | 6·32 | 4·05 | 6·54 | 3·87 | 7·07 | 3·70 | 7·70 | 3·52 | 8·60 | 3·34 | 9·94 | 3·17 | 11·78 | 2·72 | 30·67 | 2·32 | ∞ |
| 10·00 | 8·26 | 12·66 | 7·92 | 13·57 | 7·72 | 14·18 | 7·31 | 15·83 | 7·04 | 17·27 | 6·79 | 18·99 | 6·29 | 24·34 | 5·87 | 33·88 | 5·43 | 63·14 | 5·00 | ∞ | 4·64 | ∞ | 3·73 | ∞ | 3·02 | ∞ |
| ∞ | 33·07 | ∞ | 28·15 | ∞ | 25·84 | ∞ | 21·69 | ∞ | 19·46 | ∞ | 17·65 | ∞ | 14·64 | ∞ | 12·51 | ∞ | 10·68 | ∞ | 9·13 | ∞ | 7·97 | ∞ | 5·61 | ∞ | 4·14 | ∞ |
(Distances in metres; Circle of Confusion is taken at 0·032 millimetres.)
Review
Recommended: Not Tested
References
- van Oosten, G. 1999. The Ultimate Asahi Pentax Screw Mount Guide. Uitgeverij Jansz.