Re: [OT] Digital Cameras

>Absender: derk@cistron.nl
> On Thu, 5 Apr 2001, Derek Fulton wrote:
> > I read that 1 megapixels is equivalent to 100 speed ISO film, the > 
> more pixels the better resolution.
> 
> Errr? ISO is NOT resolution?? In fact, 100 ISO film has a MUCH 
> higher resolution than you're ever going to get with a digicam, 
> anywhere in the near future. So could you explain what link you are > 
trying to suggest between resolution and ISO here? Or am I > misreading 
it?

Trying to clear up this confusion a bit (as far as I, not really an 
expert, understand it)

The ISO number refers to a film's speed. That is, how much light you 
need to get a decent image on the film.

As per specification, speed is not related to resolution. However, the 
bigger the light-gathering particles in the film, the faster a film is. 
Thus, a 400 ISO film has a worse resolution than a 100 ISO one. In 
practice, unless you want to blow the picture up really big, it doesn't
make 
much of a difference. Also, there has been a steady progress in film 
technology and photochemistry, so today's 400 film might well have a 
resolution comparable to an ISO 100 20 years ago (just as an example,
don't 
quote me on the numbers).

I think what Derek read referred to comparing the film's/Digicam's 
speed, not to the resolution. Does anyone know how digicam resolutions
and 
speed are related - if at all ?

Greetings