New answers tagged optics
From a pure optics perspective, lens diameter is crucial. Larger diameter accounts for larger light "intake", and with more light ending up on the sensor, you can make the same image quality with shorter exposure.
I don't know if the original seeker is still looking, or if this has been suggested before. Older, cheaper, after-market lenses made for film cameras did not always have good coating. None of the film camera lenses needed two sets of coating - in the front and back. So if you have a camera that lets you play with older lenses, try to buy some cheaply off ...
Top 50 recent answers are included