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Re: [OM] An old comparison of scanned film vs microphotograph of film

Subject: Re: [OM] An old comparison of scanned film vs microphotograph of film
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sun, 25 Oct 2009 09:51:36 -0400
Quite a dramatic difference.

Chuck Norcutt


C.H.Ling wrote:
> Film may have very high absolution resolution (for B/W lines) but the pixel 
> quality of digial image is just better, see here a scan of RVP50 at 4000dpi 
> with 4000ED and a 21MP 5D II capture, both taken with 24/2.
> 
> http://www.accura.com.hk/temp/ST-10004.jpg (6.8MB)
> 
> http://www.accura.com.hk/temp/IMG_0918.JPG (5.5MB)
> 
> C.H.Ling
> 
> 
> 
> ----- Original Message ----- 
> From: "Tim Hughes"
> 
> 
> A long time back C.H.Ling shared on list some of his comparisons of film 
> scanner vs microphotographs of the film.
> This is is essentially the same, but is done at 2400dpi and 4000dpi, so 
> gives an idea of what is lost at different scanner resolutions. Remember 
> that film scanners have nominally a lot better resolution and lower 
> artifacts than digi cameras, at same dpi, because they don't use Bayer 
> sensor patterns, so resolution is same for all colors. (Bayer resolution is 
> half for red and blue versus green).
> 
> Contrast and AA filter also affect nominal resolution, so comparisons are 
> always difficult.
> 
> http://www.porteous.net/test/digi.html
> 
> 
> Tim Hughes
> 
-- 
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