Digital to film

Rob Novak wrote:
On Sat, 01 Apr 2006 20:08:56 -0800, David Nebenzahl
wrote:

Don't know exactly how to do this, but one piece of advice I can offer:
if you find a service bureau that can make film from your file, have
them do it on something larger than 35mm. No point in limiting the
resolution of the film if you can use something larger (like 6x8, 6x9,
etc.).

Putting the image on bigger film does not magically create more detail
and resolution. Nor would the vast majority of digital images tax the
capabilities of even 35mm film. If you're talking about captures from
a D2x, a EOS 1Ds-MkII, or a Hassy/Leaf/etc. medium format back, you
would be at the edges of even the finest grained 35mm slide stock at
12, 16, 22 megapixels, with the last probably requiring a larger
negative to express.
This is a fairly complicated area, there is loss of information going
from digital to film or film to digital.

It takes a fairly larger digital image not to degrade the information
in a good high resolution 35mm slide but it also take a large piece of
film not to add noise to a 8 MP digital image.

But even when dealing with detail film does not do all that well with
low contrast fine detail and so to keep this in tack it would take a
fairly large piece of film.

It would be an interesting experiment to transfer a 8 MP digital image
to a 35mm slide and then scan it back and see how much loss there is, I
am betting the scanned image would be no better then a 3MP image.

Scott

Tom Gardner wrote:
Is there a slick way of putting digital images on film other than a copy
stand and shooting film of a print? I have a number of digital images that
I have photochoped or want as transparencies or negs, preferably on 120. I
can still do things in the darkroom that I can't do digitally and
vise-versa.

Has anyone tried printing a digital image onto acetate sheets (the kind
used with overhead projectors), and making a contact print in the darkroom?

I don't know how well it would work, but it would be an interesting
experiment.

-Tim

"Tim" wrote

Has anyone tried printing a digital image onto acetate sheets (the kind
used with overhead projectors

Yes, called a 'digital negative' or some such.

I have wanted to try to produce contrast masks - not 'unsharp'
masks [that are actually sharp] - but fuzzy masks that sit above
the negative in the light path, out of focus, and do a
precise and repeatable dodge/burn for the negative. Can also
do contrast control with yellow and magenta areas.

There was an article in PT in the recent decades about doing this
with pencils and Mylar drafting film.


--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics, Photonics, Informatics.
Remove blanks to reply: n o lindan at ix . netcom . com
f-Stop enlarging timers: http://www.nolindan.com/da/fstop/

"Tim" wrote in message
...
Tom Gardner wrote:
Is there a slick way of putting digital images on film other than a copy
stand and shooting film of a print? I have a number of digital images
that I have photochoped or want as transparencies or negs, preferably on
120. I can still do things in the darkroom that I can't do digitally and
vise-versa.

Has anyone tried printing a digital image onto acetate sheets (the kind
used with overhead projectors), and making a contact print in the
darkroom?

I don't know how well it would work, but it would be an interesting
experiment.

-Tim

I've done this with B&W photo restorations. Scan in the old/damaged
original, do the artwork, and print it out as a negative on overhead
transparency material. Contact print as if it were a negative. It works
well. In my experience (YMMV), it uses a lot of ink, and the 'negative' has
a short life-- within weeks, the blacks became lighter density magenta.

I've tried it with color: doing a straight negative reversal and printing
with a light source filtered thru a piece of blank color film so as to get
the correct orange color mask. I haven't been very successful in this
effort.


--
Ken Hart