Quote Originally Posted by AgX View Post
And even then the difference beetween f1.4 and f1.2 is just 1/2 stop.

(I know you know, but in many low-light discussions this fact seems to be overlooked.)
That's a very good point AgX, and the Canon FD 50mm f1.4 was the systems reference lens that government agencys other official bodies and the military chose to use when they could have used any lens.