A Canon patent was found over at Northlight Images for a 50mm/1.8, which was replaced relatively recently, and a APS-C 30mm/1.8 lens has appeared at the Japanese patent office (No. 2017-102352 )
Full frame lens specifications:
- Focal length 51.60mm
- F number 1.85
- Field angle 22.75
- Image Height 21.64mm
- Lens total length 84.19mm
- BF 39.08mm
APS-C lens specifications:
- Focal length 30.90mm
- F number 1.85
- Field angle 23.85mm
- Image height 13.66mm
- Lens total length 84.50mm
- BF 35.50mm
There has always been rumbings about a “good” EF-S prime coming and 30mm has been passed around over the years, however nothing has every come of it.
The EF-S 35mm f/2.8 IS STM Macro hasn't started shipping yet, while a very neat looking lens, it's not exactly the “fast” prime people have been looking for from Canon for APS-C shooters.
Northlight Images does say that they've been told to expect a “good” EF-S prime in the future.
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