What is the canon rf 7 14mm f 2 8 3 5l fisheye stm good for?

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From Canon RF 7-14mm f/2.8-3.5L Fisheye STM: Canon RF 7-14mm f/2.8-3.5L Fisheye STM: A zoom lens by Canon for Full frame cameras, 7-14mm f/2.8-3.5. A fisheye zoom whose wide end gives a 190-degree circular image. Specs - Maker: Canon - Focal length: 7-14mm (zoom) - Maximum aperture: f/2.8-3.5 (it gets darker as you zoom in) - Made for: Full frame sensors - Mounts: Canon RF - Stabilised: no - Autofocus: yes What it frames like - On full frame (Canon RF): as marked, ...

From Focal length converter: Aperture and depth of field: The f-number sets exposure, and that doesn't change with sensor size: f/2.8 gives the same brightness on a phone as on medium format. Depth of field does change. At the same framing, multiply the f-number by the crop factor to get the full-frame aperture with the same depth of field: f/1.8 on APS-C gives about the background blur of f/2.7 on full frame, and f/1.8 on Micro Four Thirds about ...

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