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New Re: ISO 800.
The "ISO 800" (ISO is the "Frenchified" International Organization for Standardization) has to do with an international standard for [link|http://en.wikipedia.org/wiki/Film_speed|film speed].

Basically it has to do with how much light is needed for a good picture. The bigger the number the more sensitive the film is. Using available light is when you might like a higher ISO number. Flash is used to compensate for lack of sensitivity of a given film. There is always a trade-off in these things. Fast film tends to be more "grainy".

The fact that the digital camera doesn't actually use film is mostly beside the point. Similar trade-offs in picture quality come up.
Alex

When fascism comes to America, it'll be wrapped in a flag and carrying a cross. -- Sinclair Lewis
New For a digicam it basically means crappy image quality
if you want good ISO 800 you need a D-SLR (and not all of them - e.g. Olympus, Kodak aren't good at 800).

Higher ISO = less light = more noise = can use higher shutter speed for a given aperture (so if someone is moving, it can eliminate blur).

If you combine a good low light SLR (e.g. ISO 1600 or even 3200) with anti-shake (especially in-body like Sony and Pentax) and a fast lens (e.g. 50mm f/1.4 prime or Sony 28-75 f/2.8 zoom), it means you can take pictures in low light without flash.

--Tony
     Need input on buying a digital camera please? - (Nightowl) - (10)
         You have lots of choices around $100. - (Another Scott) - (1)
             B&H is awright! - (jb4)
         I like the canon line - (Bman) - (1)
             Or an A-510, likely cheaper == original version - (Ashton)
         I took all of your advice... it's a Canon! - (Nightowl) - (5)
             Re: ISO 800. - (a6l6e6x) - (1)
                 For a digicam it basically means crappy image quality - (tonytib)
             whats "Power Pedals" ? -NT - (boxley) - (2)
                 Power pedals are great! - (Nightowl) - (1)
                     never heard of such a thing, sounds great -NT - (boxley)

On bassline: Martina Nav... Navri... gosh, I wish she'd get married.
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