Folks
The assertions that digital backs can/should be made for film camers all
assume that CCDs work the same and film: that is, they record the images
when light shines on the sensitive surface. Do CCD sensors work that way?
Do digital cameras need shutters?
It may be that digitising a camera is more work than slapping a ccd cell
in the film plane. A lot more.
Ditto for the hang-up on making a CCD to match the 35mm format. Why does
the CCD need to be that big? If the answer is "to use all our existing
lenses" then that's a poor reason. Instead, imagine if we could start
a-fresh and design a digital format from scratch, to be as good as
current technology can get, optimised for whatever the market wants
(compactness, resolution, price, etc)... that's exactly what Olympus is doing.
Vaughan
--
> Date: Mon, 30 Apr 2001 11:17:17 -0700
> From: Winsor Crosby <wincros@xxxxxxxxxxxxx>
> Subject: Re: [OM] Polariod Olympus?
>
> >digital back would be nice, but we've already heard the bad news on
> >that before... :(
>
> If some third party can build Polaroid backs, it seems like a third
> party could build digital backs for various cameras. It just has to
> be profitable. Even to just match current digital camera development
> would probably be more costly than a new high end digital camera like
> the E-10. Are you willing to pay for it?
>
> Related to that is an interesting site I found this week end which is
> probably not news to some of you, but it was to me. It is
> http://www.users.qwest.net/~rnclark/scandetail.htm It is a large
> page with lots of photo and takes a while to load if you use a modem
> as I do.
>
> Clarke, a pretty good photographer from the look of it, does a lot of
> interesting work on the page comparing film formats, scans, digital
> camera images. The following are some of his conclusions based on
> some evidence on the page.
>
> "From these tests, it is my opinion that digital cameras will match
> Fujichrome Velvi 35mm film when they reach more than about 10
> megapixels. Somewhere in the 12-16 megapixels will produce color
> image quality comparable to 35 mm film (this is a compromise of more
> intensity detail and less color detail than film). Somewhat fewer
> megapixels, approximately 7-8 Mpixels will match 35mm film intensity
> detail but at below 35mm film color detail.
>
> "Medium format film: about 50 digital camera megapixels are need to
> match Fujichrome Velvia in 6 x 4.5 cm.
>
> "Large format: more than 200 digital camera megapixels are need to
> match 4x5 Fujichrome Velvia film. How much more needs further
> testing. "
>
> Take a look. It is really an interesting site.
>
> - --
> Winsor Crosby
> Long Beach, California
> mailto:wincros@xxxxxxxxxxx
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