I've been thinking about a possibility to make a custom lens for a Canon DSLR using an APS-C sensor. It would be for low-light video use only, so the sharpness shouldn't necessarily have to be really stellar. There's no need for really fancy features either.
So the design would be relatively simple:
- Fixed focal length: the closer to 20mm, the better
- Fixed focus: to infinity, or at least 100+ meters
- Fixed aperture: around f/1.8, slightly larger if possible
You're probably thinking of the Sigma 20mm f/1.8 at this point. Yes, it's a good alternative, but first I'd like to hear if this project is feasible. What kind of an undertaking do you think this could be, and what would be the estimated price range, roughly?
Any thoughts, and links, are welcome.