Carl Zeiss Jena Flektogon 20mm f/4 vs Tamron SP 28mm f/2.5 Adaptall-2
Side-by-side comparison from our catalogue data. Better values are highlighted only where a clear difference exists.
Tamron
SP 28mm f/2.5 Adaptall-2
Verdict at a glance
- Tamron SP 28mm f/2.5 Adaptall-2 is faster by 1.4 stops (f/2.5 vs f/4.0), letting in more light.
- Carl Zeiss Jena Flektogon 20mm f/4 goes wider (20mm vs 28mm).
- Tamron SP 28mm f/2.5 Adaptall-2 reaches further (28mm vs 20mm).
| Spec | Jena Flektogon 20mm f/4 | SP 28mm f/2.5 Adaptall-2 |
|---|---|---|
| Brand | Carl Zeiss | Tamron |
| Mount | M42 | M42 |
| Type | Prime | Prime |
| Focal length | 20mm (wider) | 28mm |
| Max aperture | f/4.0 | f/2.5 (faster) |
| Released | n/a | 1979 |
| Format | n/a | full-frame |
| Groups | n/a | 7 |
| Af motor | n/a | none |
| Elements | n/a | 7 |
| Weight g | n/a | 180 |
| Filter mm | n/a | 49 |
| Length mm | n/a | 37.5 |
| Diameter mm | n/a | 64.5 |
| Min focus m | n/a | 0.25 |
Carl Zeiss Jena Flektogon 20mm f/4
The Carl Zeiss Jena Flektogon 20mm f/4 is a manual-focus wide-angle prime lens covering 20mm at f/4 for M42 mount cameras. The wide view suits landscapes, architecture and environmental shots.
Tamron SP 28mm f/2.5 Adaptall-2
A 28mm f/2.5 manual-focus wide-angle prime lens, the Tamron SP 28mm f/2.5 Adaptall-2 is designed for M42 mount bodies, from the Tamron SP series. The wide view suits landscapes, architecture and environmental shots.