It's true to say that Pentax's prime lenses are quite good, but then they only produce APS-C cameras.
But I (and many others) use APS-C cameras.
Nikon has a 10.5mm Fisheye, but it's a DX one and can't be used on FF (Unless you set the camera to DX), ...
Once again, many people don't use FF cameras. If I shot Nikon, I'd use a D300s not a D700.
Nikon produced the 35mm prime, and it really hit the fan when they launched it, on the Nikon forums where most people wanted a FF lens.
Yeah, but the owners of DX bodies bought them. BTW have you seen the new Nikon 35mm f1.4 for the FX user? Nikon looks after both DX and FX user, why can't Canon?
As for a 22mm lens, I don't think anyone produces that non standard focal length, 20mm & 24mm maybe?
For Canon APS-C users 22mm x 1.6 equals 35.2mm, a standard size for all 35mm film/FF digital cameras. Most of the time I use my 10-22mm zoom it's at 22mm, that why I'd like a faster 22mm prime.
You're not likely to see a 30mm prime, because 35mm gives the same FOV as a 50mm on FF which is the reason why Nikon launched their version, ...
For Canon users 30mm x 1.6 equals 48mm
, 35mm x 1.6 equals 56mm
. I'd prefer 48mm to 56mm for a standard lens. BTW A 50mm lens' focal length is closest to the 43.2 mm diagonal of the 35 mm camera's 24 x 36 mm frame. So 43.2 mm, not 50mm, is what standard really should be.
Maybe that's why Pentax made the smc PENTAX FA 43mm F1.9
Limited for their 35mm film cameras.
For Nikon 35mm x 1.5 equals 52.5mm. In the past Nikon made 55mm f1.2 and 58mm f1.2 standard lenses as well as 50mm f1.4/f1.8 ... so 52.5mm fits in the middle of their standard grouping.
you say you want f/1.8 but the current version is f/2.0 just a half a stop from what you are asking for, is that such a deal breaker?
Most of my work is done using Profoto studio strobes and I set the lens at f5.6 up, often f16 when using the TS-C 90mm f2.8 for table top. But I'm sure many Canon APS-C shooter would fell short changed at f2.0, 'cause Nikon cares enough to make a 35mm 1.8.