Pentacon 100mm F/2.8 auto / electric
Short telephoto prime lens • Film era • Discontinued
- Announced:
- · 1971
- Production status:
- ● Discontinued
- Country of design:
- · GDR (German Democratic Republic)
- Original name:
- · PENTACON auto 2.8/100 MADE IN G.D.R.
- · PENTACON electric 2.8/100 MADE IN G.D.R.
- Class:
- · Fast full-frame short telephoto prime lens
- System:
- · Contax/Praktica (1949)
- · Exakta (1936)
Model history (2)
| ■Meyer-Optik Gorlitz Orestor 100mm F/2.8 | A | 5 - 4 | 1.10m | ⌀49 | 1967 ● | |
| ■Pentacon 100mm F/2.8 auto / electric | A | 5 - 4 | 1.10m | ⌀49 | 1971 ● | |
Specification
| Optical design: | |
| 35mm full frame | |
| 100mm | |
| F/2.8 | |
| 5 elements in 4 groups | |
| Exakta [44.7mm] | |
| M42 [45.5mm] | |
| 24.4° (35mm full frame) | |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| 6 (six) | |
| Focusing: | |
| 1.10m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 320g (mount not specified) | |
| ⌀?×64mm (mount not specified) | |
| Accessories: | |
| Screw-type 49mm | |
| <No data> | |
| <No data> |
Sources of data
- Pentacon Wechselobjektive für Einäugige Spiegelreflexkameras (1972).
- Carl Zeiss Jena / Pentacon - Objektive für Spiegelreflexkameras (1973).
From the editor
A Meyer-Optik Görlitz Orestor 100/2.8 with a new name.
The lens was produced in two versions:
- "auto" - a lens with plain M42 screw mount with the pin for automatic stop down;
- "electric" - as "auto", but also with electrical contacts for compatible Praktica models.
The "auto" version weighs 320g, while the "electric" one is 30g lighter (290g).
For the Exakta RTL 1000, the lens was produced in version with automatic diaphragm mechanism with internal release.