CCD Speed Question

[Uranium235]

Hiya,

Just a quick question in regard to how fast a CCD is compared to a DSLR. Ive decided to stick with the fraccy from now on, but imaging at f7.5 is like pulling teeth so I'd like to speed things up a bit. I have considered a focal reducer, but that will also reduce my overall resolution.

So im seriously considering the Atik320e mono now (as its well matched to the ED80). But roughly how much faster would it be? ie: How long would it take to gather the same amount of light as a modded dslr (twice as fast?).

I could get a bigger scope, but im now a fan of keeping it uber-lightweight because of the flawless guiding it offers.

Thanks for any advice!

[Whippy]

I think what you're looking for is the chip's sensitivity, it's measured as QE (quantum efficiency). Look for that on the specs sheet.

FWIW, imaging at f7.5 isn't that bad!

Tony..