CodySydney

I know this is a ridiculously old post but this was a real dawn-of-realisation moment for me. I've been trying to figure out why focal length has anything to do with lens speed... doesn't aperture = more light? And your post finally got through to me.. of course! focal length -> narrow field of view -> less light = how did I not get this until now. So I hope you're still living the dream and thanks!