[filmscanners] RE: Using high res digital camera for scanning/duplicating

["Laurie Solomon" <laurie@advancenet.net>]

> if the result was high quality digital scans at the rate of  a
> roll every few minutes instead of a roll per hour.

I doubt that this is possible with digital cameras even if they used a
very large flash cards for memory to contain a large number of high
quality camera raw or TIFF files since not only are digital camera's
slower than film cameras so as to present obstacles to high speed
photography but one will need to change the subject film frames between
shots, which takes time and often requires some adjustments for each
slide.

I do think that one could probably duplicate or digitalize a roll of
film using a digital camera at a rate of less than 1 roll per hour; but
I doubt if one can duplicate or digitalize a roll every few minutes -
especially if the roll consisted of separate individual slides or film
frames or even 4-6 frame film strips.  In the case of the 4-6 frame film
strips, you would have to change the film strips from one strip to the
next frequently which will take time.  The only time I could see that
happening would be if the entire roll was in a single strip uncut and
feed through a slide duping setup automatically with only minor
variations in the film frames requiring only minor camera adjustments
from frame to frame in the strip; however, like the film scanner, even
this would probably feed the film slowly as is currently the case with
strip feed film scanners.

This is my take on this particular item; however, the others have raised
some good points and interesting considerations with respect to other
issues and points.

----Original Message----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk] On Behalf Of
mail@imagesbykehl.com
Sent: Tuesday, February 14, 2006 12:58 AM
To: laurie@advancenet.net
Subject: [filmscanners] Re: Using high res digital camera for
scanning/duplicating

> Glad to see you are still active on this list Laurie.
>
> You raise some very good points.
> Some I have considered, others I have not.
>
> I think I would be willing to implement all of the things you
> mentioned: filters, special lighting, copy stand, filmholders, etc, if
> the result was high quality digital scans at the rate of  a
> roll every few minutes instead of a roll per hour.  I am
> certainly more concerned with time than cost.  But the
> software for converting the negatives may be a serious issue.
>
> Thank you for your input.
>
> Bob Kehl
> ImagesByKehl.com
>
>
>
> ----- Original Message -----
> From: "Laurie Solomon" <laurie@advancenet.net>
> To: <mail@imagesbykehl.com>
> Sent: Monday, February 13, 2006 10:26 PM
> Subject: [filmscanners] RE: Using high res digital camera for
> scanning/duplicating
>
>
> Your questions tend to ignore some other key issues.  Even if
> the resolutions and quality of digital cameras have improved
> to the point of competing with flatbed scanners or even film
> scanners when it comes to the results or even if one uses
> high quality flat field normal and/or macro duplicating
> lenses, one has to deal with issues of maintaining the film
> in a flat state without curl or bowing, flat and even color
> corrected lighting of the film, and finding software that
> will be able to both reverse and account for the orange
> masking on color negative film without causing unwanted color casts
> and shifting.
>
> Of equal importance, one would have to establish and utilize
> a traditional copy stand setup to keep the camera stable and
> without shake for longer exposures at the proper distances
> given the lighting and light levels being used as well as
> allowing for the use of filters over the lights for purposes
> of softening the lighting as well as polarizing the lighting
> and correcting it for color temperature, depending on the
> nature of the subject film being rephotographed if one  is to
> seriously engage in using a digital camera to digitalize
> films.  One might also find a need to utilize filters over
> the lens of the digital camera to account for variances in
> the color characteristics of the films in question with
> respect to the types of camera sensors being used.
>
> I have not used Vuescan in a while and have not kept up with
> all the updates of the software; but I have to wonder if it
> can be used to color correct and account for the orange
> masking of color negatives when used with camera raw files
> generated by the higher quality digital cameras. I have the
> feeling that one would have to convert the camera raw files
> to standard file formats like TIFF and JPEG before one could
> engage in any post production image editing and correction using
> Vuescan.
>
> ----Original Message----
> From: filmscanners_owner@halftone.co.uk
> [mailto:filmscanners_owner@halftone.co.uk] On Behalf Of
> mail@imagesbykehl.com Sent: Monday, February 13, 2006 10:49 AM
> To: laurie@advancenet.net
> Subject: [filmscanners] Using high res digital camera for
> scanning/duplicating
>
>> Is the technology to the point yet where we could use a high quality
>> duplicating lens and a high resolution digital camera (Canon/Nikon
>> 12-16mp) to digitize slides and negatives.
>> What would the potential pitfalls be?
>> Would Vuescan work to color correct the negatives?
>>
>> Forgive me is this subject has already been discussed to death.  I've
>> been away from the list for a few years.
>> If has already been addressed someone please direct me to the
>> archives.
>>
>> Thanks
>>
>> Bob Kehl
>> ImagesByKehl.com
>> online for four years - thanks to this group
>>
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>
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