© Robert I. Sadler, 2011
© Robert I. Sadler, 2011
Description, Notes & Specifications
| Manufactured: | 1971—1972 |
|---|---|
| Camera Mount: | M42x1 |
| Lens Elements / Groups: | 6 / 5 |
| Diaphragm Type: | automatic / manual |
| Diaphragm Blades: | 6 / hexagonal |
| Angle of View: | 43° |
| Maximum Aperture: | f/1·8 |
| Minimum Aperture: | f/16 |
| Minimum Focus Distance: | 0·45 metres |
| Magnification Factor: | |
| Filter Size: | ø 49 mm (screw) |
| Length: | 38·5 mm / 47·5 mm |
| Largest Diameter: | 57 mm |
| Weight: | ≈200 grams |
| Product Numbers: | 37101 37104 37106 |
| Serial Number Range: | — |
| My Serial Number: | 4859964 |
Super-Multi-Coated TAKUMAR 55mm f/1·8 — The highly popular 55mm f/1·8 is a general purpose lens identical in function to that of 50mm f/1·4, except for slightly less light-gathering power (no great disadvantage under most outdoor lighting conditions) and marginally longer focal length for slightly tighter image composition on the focusing screen.1
Distance engravings in yellow (metres) and blue (feet).
Same optical design as the Super-Takumar 1:1.8/55 (Mark II) and the Super-Takumar 1:2/55 (Mark II) lenses.
The same optical design was used for the SMC TAKUMAR 1:1.8/55 and the SMC TAKUMAR 1:2/55 lenses.
Mark IA: Product number 37101, same as the Super-Takumar 1:1.8/55 (Mark II) lens; without the light meter coupling mechanism.
Mark IB: Product number 37104 (available September 1971).
Mark IC: Product number 37106.
Depth of Field Guide
| f/1·8 | f/2 | 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 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0·45 | 0·45 | 0·45 | 0·45 | 0·45 | 0·44 | 0·46 | 0·44 | 0·46 | 0·44 | 0·46 | 0·44 | 0·46 | 0·44 | 0·46 | 0·44 | 0·46 | 0·44 | 0·47 | 0·43 | 0·47 | 0·43 | 0·47 | 0·42 | 0·48 |
| 0·50 | 0·50 | 0·50 | 0·50 | 0·50 | 0·49 | 0·51 | 0·49 | 0·51 | 0·49 | 0·51 | 0·49 | 0·51 | 0·49 | 0·51 | 0·48 | 0·52 | 0·48 | 0·52 | 0·48 | 0·52 | 0·48 | 0·53 | 0·46 | 0·54 |
| 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 |
| 0·60 | 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 |
| 0·65 | 0·64 | 0·66 | 0·64 | 0·66 | 0·64 | 0·66 | 0·64 | 0·66 | 0·63 | 0·67 | 0·63 | 0·67 | 0·63 | 0·67 | 0·62 | 0·68 | 0·62 | 0·68 | 0·61 | 0·69 | 0·61 | 0·70 | 0·59 | 0·72 |
| 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 |
| 0·80 | 0·79 | 0·81 | 0·79 | 0·81 | 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 |
| 0·90 | 0·89 | 0·91 | 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 |
| 1·00 | 0·98 | 1·02 | 0·98 | 1·02 | 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 |
| 1·20 | 1·17 | 1·23 | 1·17 | 1·23 | 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 |
| 1·50 | 1·46 | 1·54 | 1·46 | 1·55 | 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 |
| 2·00 | 1·93 | 2·08 | 1·92 | 2·09 | 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 |
| 3·00 | 2·84 | 3·18 | 2·82 | 3·20 | 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 |
| 5·00 | 4·57 | 5·52 | 4·53 | 5·58 | 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 |
| 10·00 | 8·41 | 12·34 | 8·26 | 12·66 | 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 | ∞ |
| ∞ | 35·56 | ∞ | 33·07 | ∞ | 25·84 | ∞ | 21·69 | ∞ | 19·46 | ∞ | 17·65 | ∞ | 14·64 | ∞ | 12·51 | ∞ | 10·68 | ∞ | 9·13 | ∞ | 7·97 | ∞ | 5·61 | ∞ |
(Distances in metres; Circle of Confusion is taken at 0·032 millimetres.)
Close-up Data
| Device | Magnification | Subject Area (mm) | Subject Distance (cm) |
|---|---|---|---|
| Extension Tubes | |||
| 1 | 0·34 | 107 x 71 | 29·34 |
| 2 | 0·50 | 71 x 48 | 24·69 |
| 3 | 0·67 | 54 x 36 | 22·83 |
| 1+3 | 0·84 | 43 x 29 | 22·10 |
| 2+3 | 1·01 | 36 x 24 | 21·92 |
| 1+2+3 | 1·17 | 31 x 20 | 20·06 |
| Helicoid Tube (Lens normal) | |||
| Helicoid shortest/lens at ∞ | 0·30 | 122 x 81 | 31·90 |
| Helicoid shortest/lens at 0·45 | 0·47 | 77 x 51 | 25·80 |
| Helicoid longest/lens at ∞ | 0·54 | 67 x 45 | 24·60 |
| Helicoid longest/lens at 0·45 | 0·71 | 51 x 34 | 30·00 |
| Helicoid Tube (Lens reversed) | |||
| Helicoid shortest | 0·71 | 51 x 34 | 23·00 |
| Helicoid longest | 0·95 | 38 x 25 | 22·30 |
| Bellows (Lens reversed) | |||
| Auto-Bellows | 0·74~2·66 | 48·4 x 32·2~13·5 x 9·0 | 22·80~28·20 |
| Bellows II | 0·98~3·93 | 35·9 x 24·6~9·2 x 6·1 | 22·30~34·80 |
Review
Recommended: Not Tested
References
- Cooper, J.D. 1975. Honeywell Pentax Manual. AMPHOTO.
- van Oosten, G. 1999. The Ultimate Asahi Pentax Screw Mount Guide. Uitgeverij Jansz.