infinity focus only lens for astro photography

TominNJ

EOS M6 Mark II
Mar 14, 2015
72
62
my optics knowledge is almost zero but it seems to me that there would be a market for a wide fast lens that focuses only at infinity and Is corrected for coma. It would need a small focus adjustment to correct for temperature. The limited focus movement should make the lens cheaper to manufacture.

i think a 3rd party company that made it for various mounts could sell enough to make a profit. Someone should get right on this and have it ready for the next new moon.
 

Joules

EOS R
CR Pro
Jul 16, 2017
1,219
1,376
Hamburg, Germany
But especially for wide angle astro you usually want some piece of landscape in the frame, and often in the foreground. So there is a disadvantage in loosing focus ability.