RE: Future of Photography (was filmscanners: real value?)

[Jack Phipps <JPhipps@asf.com>]

In order to get the same information that film provides, you must get red,
green and blue information at each pixel (like the Fovian sp? digital
camera). Many other cameras interpolate for rgb. So depending on the
resolution you need and the bit depth, that will determine how many
megapixels you need. You will need three channel information, whether it is
interpolated or measured.

-----Original Message-----
From: Austin Franklin [mailto:austin@darkroom.com]
Sent: Wednesday, January 31, 2001 6:23 PM
To: filmscanners@halftone.co.uk
Subject: RE: Future of Photography (was filmscanners: real value?)


The sensor size is the exact same whether the information you are garnering
form it is color or B&W.  Your numbers are image file size, which is not the
same as the requirements for a sensor to 'equal' 35mm film, which was the
discussion point, I believe.

> -----Original Message-----
> From: owner-filmscanners@halftone.co.uk
> [mailto:owner-filmscanners@halftone.co.uk]On Behalf Of Jack Phipps
> Sent: Wednesday, January 31, 2001 6:48 PM
> To: 'filmscanners@halftone.co.uk'
> Subject: RE: Future of Photography (was filmscanners: real value?)
>
>
> Unless it is color. Then it would be:
> 24mm/25.4=.944 inches x 5080 = 4800
> 36mm/25.4=1.417 inches x 5080 = 7200
> 4800x7200x3(color channels) = 103.68 meg 8 bit image
> 103.68 x 2 = 207.360 meg 16 bit image
>
> However, you should be able to get by with a much smaller
> resolution scan
> (<4000 for sure).
> Jack Phipps
>
> -----Original Message-----
> From: Austin Franklin [mailto:austin@darkroom.com]
> Sent: Wednesday, January 31, 2001 1:42 PM
> To: filmscanners@halftone.co.uk
> Subject: RE: Future of Photography (was filmscanners: real value?)
>
>
> > As for the resolution needed to equal 35mm film, I think I
> > have seen it quoted
> > that it would need about 8-10 Megapixels.
>
> It is quite simple to calculate, and, of course, depends on
> what film you
> want to try to 'emulate'.  At 5080DPI Plus-X does not reveal
> grain.  That
> means 5080 x 1 x 5080 x 1.5 = 38.7 megapixels.