Carl Zeiss Biogon T* 25 mm f/2.8 ZM § 03 Head to head
Carl Zeiss Biogon T* 25 mm f/2.8 ZM vs Thypoch Eureka 28 mm f/2.8
Zeiss 25mm f/2.8 has a wider field of view. Thypoch 28mm f/2.8 has a longer reach.
Both lenses are made for the Leica M mount: the Carl Zeiss Biogon T* 25 mm f/2.8 ZM is a 25mm f/2.8 prime, and the Thypoch Eureka 28 mm f/2.8 is a 28mm f/2.8 prime. On paper the Thypoch Eureka 28 mm f/2.8 comes out ahead, 5 advantages to 2, but which one suits you depends on what you shoot.
Carl Zeiss Biogon T* 25 mm f/2.8 ZM 
Thypoch Eureka 28 mm f/2.8 01
Key differences
Why is the Carl Zeiss Biogon T* 25 mm f/2.8 ZM better than the Thypoch Eureka 28 mm f/2.8?
- Wider field of view (25mm vs 28mm)
- Has a physical aperture ring
Why is the Thypoch Eureka 28 mm f/2.8 better than the Carl Zeiss Biogon T* 25 mm f/2.8 ZM?
- Longer reach (28mm vs 25mm)
- 130 g lighter (130 g vs 260 g)
- Focuses 10 cm closer (0.4 m vs 0.5 m)
- Smaller filter thread (27 mm vs 46 mm)
- Newer design (2025 vs 2004)
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Which should you buy?
- street For street photography, the Thypoch Eureka 28 mm f/2.8 has the edge: it is 130 g lighter to carry.
- travel For travel, the Thypoch Eureka 28 mm f/2.8 has the edge: it is 130 g lighter to carry.
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Specification
| Specification | Carl Zeiss Biogon T* 25 mm f/2.8 ZM | Thypoch Eureka 28 mm f/2.8 |
|---|---|---|
| Focal length | 25mm | 28mm |
| Maximum aperture | f/2.8 | f/2.8 |
| Minimum aperture | f/22 | f/16 |
| Lens type | Prime lens | Prime lens |
| Format | Full frame | Full frame |
| Weight | 260 g (9.17 oz) | 130 g ◆ |
| Dimensions | — | 19.5 x 52 mm |
| Minimum focusing distance | 0.5 m (19.69 inches) | 0.4 m ◆ |
| Image stabilization | No | No |
| Aperture ring | Yes | No |
| Aperture blades | 10 | — |
| Optical construction | 9 elements in 7 groups | 7 elements / 4 groups |
| Filter size | 46 mm | 27 mm ◆ |
| Lens mount | Leica M | Leica M, Fujifilm X |
| Released | 2004 | 2025 |
| Price | — | $459 list price |
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Sample frames
Carl Zeiss Biogon T* 25 mm f/2.8 ZM
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Video reviews
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Questions
- Which is lighter, the Carl Zeiss Biogon T* 25 mm f/2.8 ZM or the Thypoch Eureka 28 mm f/2.8?
- The Thypoch Eureka 28 mm f/2.8 weighs 130 g, 130 g less than the Carl Zeiss Biogon T* 25 mm f/2.8 ZM (260 g).
- Which focuses closer, the Carl Zeiss Biogon T* 25 mm f/2.8 ZM or the Thypoch Eureka 28 mm f/2.8?
- The Thypoch Eureka 28 mm f/2.8 focuses down to 0.4 m, against 0.5 m for the Carl Zeiss Biogon T* 25 mm f/2.8 ZM.
- Do the Carl Zeiss Biogon T* 25 mm f/2.8 ZM and the Thypoch Eureka 28 mm f/2.8 have image stabilization?
- No, neither lens has optical image stabilization; rely on in-body stabilization if your camera has it.
- Is the Carl Zeiss Biogon T* 25 mm f/2.8 ZM or the Thypoch Eureka 28 mm f/2.8 better for street photography?
- For street photography, the Thypoch Eureka 28 mm f/2.8 has the edge: it is 130 g lighter to carry.
- Is the Carl Zeiss Biogon T* 25 mm f/2.8 ZM or the Thypoch Eureka 28 mm f/2.8 better for travel?
- For travel, the Thypoch Eureka 28 mm f/2.8 has the edge: it is 130 g lighter to carry.
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