© Robert I. Sadler, 2011
© Robert I. Sadler, 2011
Description, Notes & Specifications
| Manufactured: | 1971—1975 |
|---|---|
| Camera Mount: | M42x1 |
| Lens Elements / Groups: | 4 / 3 |
| Diaphragm Type: | automatic / manual |
| Diaphragm Blades: | 5 / pentagonal |
| Angle of View: | 46° |
| Maximum Aperture: | f/4 |
| Minimum Aperture: | f/22 |
| Minimum Focus Distance: | 0·234 metres |
| Magnification Factor: | 1:2 |
| Filter Size: | ø 49 mm (screw) |
| Length: | 53·5 mm |
| Largest Diameter: | 57 mm |
| Weight: | ≈245 grams |
| Product Number: | 43912 |
| Serial Number Range: | — |
| My Serial Number: | 5871301 |
Super-Multi-Coated MACRO-TAKUMAR 50mm f/4 — Especially designed for close-in picture-taking and photomacrography, can be used as a standard lens covering range of life-size (24x36mm object area) to infinity objects. Can be used with extension tubes or bellows for greater magnifications. Optical contrast high, an advantage with low contrast subjects, Sharpness of focus edge to edge even at full aperture. Lens helicoid extends for 1:2 magnification; auto extension tube makes 1:1 magnification possible; auto diaphragm retained in both modes. Magnification scale on lens.1
Distance engravings in yellow (metres) and blue (feet); red IR marker; special engravings (in white) for image ratio.
The same optical design as the Super-Macro-Takumar 1:4/50 lens.
Close-up Data
| Device | Magnification | Subject Area (mm) | Subject Distance (cm) |
|---|---|---|---|
| Helicoid Tube (Lens normal) | |||
| Helicoid shortest/lens at ∞ | 0·33 | 111 x 74 | 28·00 |
| Helicoid shortest/lens at 0·234 | 0·59 | 61 x 40 | 22·20 |
| Helicoid longest/lens at ∞ | 0·83 | 44 x 29 | 20·90 |
| Helicoid longest/lens at 0·234 | 1·09 | 33 x 22 | 20·80 |
| Bellows (Lens normal / lens at 0·234) | |||
| Auto-Bellows | 1·78~4·88 | 20·7 x 13·8~7·4 x 4·9 | 22·50~36·60 |
| Bellows II | 1·10~4·36 | 32·6 x 21·7~8·3 x 5·5 | 20·80~34·10 |
| Bellows (Lens reversed) | |||
| Bellows II | 1·53~4·78 | 23·6 x 15·7~7·5 x 5·0 | 216·90~361·90 |
Review
Recommended: Yes
References
- Cooper, J.D. 1975. Honeywell Pentax Manual. AMPHOTO.
- van Oosten, G. 1999. The Ultimate Asahi Pentax Screw Mount Guide. Uitgeverij Jansz.