
Note that sunstars are sometimes visible even at f/2.8. This is due to the diaphragm design. The aperture shape is decagon starting already at f/2.8.
See also related notes:
- Risespray 11/2.8 Fisheye: My experience (2023-09-10)
- Risespray 11/2.8 Fisheye (for full-frame mirrorless cameras) (2023-08-14)
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