I have two fisheye lenses for a full-frame sensor/film: the Risespray 11mm f/2.8 (Sony FE) and the Зенитар/Zenitar 16mm f/2.8 (Pentax K).
(The Zenitar on the right with the Pentax K-Sony FE/E adapter).
I compared these two lenses.
At f/8 (with the Zenitar it's more like f/6-f/7 relative to the fully open f/2.8 aperture):
1.
(Risespray 11/2.8)
(Zenitar-K 16/2.8)
2.
(Risespray 11/2.8)
(Zenitar-K 16/2.8)
3.
(Risespray 11/2.8)
(Zenitar-K 16/2.8)
4.
(Risespray 11/2.8)
(Zenitar-K 16/2.8)
The Risespray has a wider angle of view. The Zenitar has correspondingly more magnification (at the same focusing distance).
If these focal lengths (11mm and 16mm) are correct, the Risespray is closer to stereographic projection and the Zenitar is closer to equisolid projection.
At f/2.8:
At such short focal lengths, there is certainly no strong background blur.
5.
(Risespray 11/2.8)
(Zenitar-K 16/2.8)
6.
(Risespray 11/2.8)
(Zenitar-K 16/2.8)
The Risespray has a shorter minimum focusing distance, so the maximum magnification is higher than with the Zenitar. Of course, the viewpoints are different:
7.
(Risespray 11/2.8)
(Zenitar-K 16/2.8)
See also related notes:
- Risespray 11/2.8 Fisheye (for full-frame mirrorless cameras) (2023-08-14)
- K&F Concept: Адаптер Pentax K (DA) - Sony FE/E (2022-03-28)
- Зенитар-16/2.8 (2006-12-24)
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