Tokyo Kogaku Topcor 90mm F/3.5 LSM
Short telephoto prime lens • Film era • Discontinued
- Announced:
- · 1956
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · Tokyo Kogaku Topcor I:3,5 f=9cm
- Class:
- · Slow full-frame short telephoto prime lens
- System:
- · Leotax (1938)
Specification
| Optical design: | |
| 35mm full frame | |
| 90mm | |
| F/3.5 | |
| 3 elements in 3 groups (Cooke triplet) | |
| Leica screw mount | |
| 27° (35mm full frame) | |
| Diaphragm mechanism: | |
Diaphragm type: | Manual |
Aperture control: | Aperture ring |
| 10 (ten) | |
| Focusing: | |
Coupled to the rangefinder: | Yes |
| 3.5 ft. (~1.05m) | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| <No data> | |
| <No data> | |
| Accessories: | |
| Screw-type 34mm | |
| Clamp-on round with set screw |
Sources of data
- Leotax TV2 manual.
- Leotax TV manual.
- Leotax FV manual.
Manufacturer description
From the Leotax F booklet (1954):
A newly-produced lens possessing both sharpness and brightness.
From the editor
The lens was first mentioned in the booklet for the Leotax F camera (1954), but it was externally different from the version shown on this page and looked the same as the Topcor 135/3.5.
The hood for the Topcor 9cm/3.5 and Topcor 5cm/3.5 lenses is the same.
Lenses with similar focal length
| ■Leica screw mount (13) | |||||||||
| Serenar / Canon 100mm F/3.5 [I] LSM | M | 5 - 4 | 1.00m | S.VI | 1953 ● | ||||
| Canon 100mm F/3.5 [II] LSM | M | 5 - 4 | 1.00m | ⌀34 | 1958 ● | ||||
| Canon 100mm F/3.5 [III] LSM | M | 5 - 4 | 1.00m | ⌀40 | 1960 ● | ||||
| Cosina Voigtlander APO-Lanthar 90mm F/3.5 MC LSM | M | 6 - 5 | 1.00m | ⌀39 | 2001 ● | ||||
| Leitz Wetzlar Elmar 90mm F/4 [I] Type 1 [ELANG, ELANGKUP, ELANGCHROM] | M | 4 - 3 | 1.00m | A36 | 1931 ● | ||||
| Leitz Wetzlar Elmar 90mm F/4 [I] Type 3 [ELANG / 11730, ELANG / 11030] | M | 4 - 3 | 1.00m | 1950 ● | |||||
| Leitz Wetzlar Elmar 90mm F/4 [II] [11730] | M | 3 - 3 | 1.00m | E39 | 1964 ● | ||||
| Leitz Wetzlar Elmar 90mm F/4 [I] Type 2 [ELANG] | M | 4 - 3 | 1.00m | 1933 ● | |||||
| Sankyo Kohki Komura 80mm F/3.5 LSM | M | ? - ? | 1.25m | ● | |||||
| FED-36 100mm F/6.3 LSM akaФЭД 100mm F/6.3 | M | 4 - 2 | 1.00m | A36 | ● | ||||
| Sun Sola 90mm F/4 LSM Type 1 | M | 4 - 3 | 3.5 ft. | ● | |||||
| Sun [Sola] 90mm F/4 LSM Type 2 akaXebec 90mm F/4 LSM | M | 4 - 3 | 4 ft. | ⌀34 | ● | ||||
| Carl Zeiss Jena Triotar 85mm F/4 LSM | M | 3 - 3 | 1.00m | ● | |||||