Originally posted by GibbyTheMole Found this lens for $30. Haven't bought it yet:
http://www.sec-op.com/downloads/SO-21CC.pdf
The 03 fisheye has a 160 degree angle of view. The one above is listed as 160, 130. Not sure what that second number is, unless it's 160 degrees wide & 130 degrees high.
As StigVidar says, for different sensor sizes. Unlike what he says though this doesn't make it unusable on the Q, you just won't be using the whole sensor.
Originally posted by GibbyTheMole Fixed aperture is f:2. Too fast for decent IQ?
Not as such (the 01 prime is fine wide open), but I doubt this is any good. Quite possibly the same optics as my lens with the same specs, just a more convenient mount. (Mine is "board mount", 12mm screw.) I haven't managed to mount it properly, but so far my testing suggests it is terrible.