Archived posting to the Leica Users Group, 2000/10/30

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Subject: RE: [Leica] Digital progress
From: D Khong <dkhong@pacific.net.sg>
Date: Mon, 30 Oct 2000 18:31:01 +0000

 
>
>> Conventional estimates say that a 35mm negative has about 20Mb


Austin Franklin wrote:
>I do not believe that's close.  If depends on if you are talking about B&W 
>(which only has one value/pixel) or color (which has 3 values/pixel).  It 
>also depends on film.  You might be ballpark for some 6400 speed B&W film, 
>but certainly no where near for a 100 speed film.
>
>I would strongly urge you to do the arithmetic your self.  Pick a good 
>film, take the grain size and see how many grains are in the image 
>area...and multiply by either 2 or 4.  That'll give you a good estimate. 
> It's a heck of a lot more than 20M.  You don't have to be really anal to 
>see your 20M number is way off...
>
>

What's the MB value for 100 film?  I think you have the answer and will
appreciate if you can share it with the rest of us.

Dan K.