Yes, film doesn't mean necessarly 35mm and what Ansel Adams got in 1940 it's
still impossible to reach for leicas 80 years (of technology development)
later.
http://www.canhamcameras.com/http://www.berlebach.de/http://www.linhof.de/http://www.silvestricamera.info/eng/home_eng.htmhttp://www.wica-wetzlar.de/welcome.htmlhttp://www.genyosha.com/JCTN/Advertisers/SZ/Tomiyama/Tomiyama.htmlhttp://www.gilde-kamera.de/en/index3.htmlhttp://www.gandolficameras.com/
Gianni
----- Original Message -----
From: "Green, Peter" <email@hidden>
To: <email@hidden>
Sent: Tuesday, September 23, 2003 8:02 AM
Subject: film vs digital.
> Gooday all, I greatly enjoy this little pot boiler and would like to add
my two bobs worth.
> I shoot 35mm 60 x 45 mm and PAL DV formats, and I am looking to shoot big
quicktime panorammas in future.
> I shoot digital video for moving images, because of cost, image quality,
and low light sensitivity.
> I shoot 35mm neg because of cost, (my 25 year old OM2 is paid for), image
quality and the ability to shoot three >minute time exposures or a full roll
of film in less than 10 seconds.
>
> This is my guess at the math.
> 35mm film is 24mm x 36mm unmounted.
> Thats 24, 36 = 864 sq mm of sensor area.
> Film resolution is around 80 line pairs per mm. That means 80 black lines
and another 80 white lines per mm.
> 24 x 160 = 3840 lines
> 36 x 160 = 5760 lines
> 3840 x 5760 = 22,118,400 dots or chemical pixels.
> A Kodak pro photo cd scan of a 35mm neg/slide comes out at around 18Mb
medium res or 72Mb high res, so a 22 megabit resolution for film seems
plausable.
>
> The film has three or four layers to pick up colour for each pixel. If we
say each of three layers resolves 256 shades, then we have 22,118,400 x 24/8
or
> 66, 355200 bytes of data.
>
> If you think you can use 16 bits per pixel, like photoshop, then we have
22,118,400 x 48/8 or
> 132,710,400 bytes of data.
>
> On a good day with a favourable breeze it seems you can squeeze at least
20Mega bytes of data out of a 35mm frame. If thats not enough you can shoot
60 x 70 mm medium format film.
> 60 x 70 = 4200 sq mm of sensor area.
>
> How many of the digital cameras stack their photo sensors on top of each
other to capture three or four colours at once the way film does?
Does this mean I divide the number of megapixels by three or four to get the
effective colour resolution?
>
> How many digital cameras have effective 22 megapixel resolution at full
colour?
>
> I look forward to the day when I can buy a 25 megapixel camera for $500.
>
> :) Peter
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