Message-Id: <199905151407.HAA14798@dns.ccit.arizona.edu> Date: Sat, 15 May 1999 09:43:03 -0400 From: "Jerome B. Skapof,Ed.D" <mailto:skapof@SOVER.NET> Subject: Re: Digital Camera for poster project To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
Virginia: Beside the large pixel count and file size generated by digital cameras to capture the print on posters, you also have to consider the lighting requirements and productivity issues. All digital cameras with the exception of just one, require hot lights to do large captures (line scanners). Only the Jenoptik LOS eyelike can use strobes for a res. of 6X6. Additionally, line scanning backs are have extremely slow scan times. Scanning backs and cameras that use PAD (Piezo Aperture Displacement or Micro Scanning) can to captures of 100 MB or more in 60 seconds.You might want to check out a site that lists and discusses all these high end cameras and related technology...academicimaging.com for ideas and a detailed explanation of PAD.
Jerry Skapof, Ed.D V.P., EIN, Inc mailto:skapof@sover.net 802-362-3169
Virginia Kerr wrote: >
> Are you hoping to use a pixel dimension large enough to read any small text
> on the posters in your high resolution scans? I'd be interested to see
> what specifications you're developing. For two poster digitization
> projects at Northwestern University we had the posters photographed and
> scanned from the film. Since that was a couple of years ago (1996-7),
> we've recently considered a new poster project using a digital camera.
> But we're put off by the pixel dimensions required to capture all text from
> something the size of an average poster.
>
> -- Virginia Kerr
>
> World War II Posters from Northwestern University Library
> http://www.library.nwu.edu/govpub/collections/wwii-posters/
> Posters from the Herskovits Library of African Studies
> http://www.library.nwu.edu/africana/collections/posters/
>
> At 04:38 PM 5/13/99 -0600, you wrote:
> > I am looking for the best, but reasonably priced, digital camera
> > (preferably $1,000 or less) to capture images of (for access purposes
> > only) the McCormick-International Harvester Co. posters we will be
> > physically preserving and storing.
> >
> > I would like to find a reasonably priced camera that will give us the
> > highest quality image currently available.
> >
> > Anyone compared digital cameras recently? Are there guidelines for
> > comparing digital cameras? What should I be looking for? Could
> > anyone help me cut to a manageable one or few cameras to compare and
> > select among?
> >
> > Thanks, in advance.
> >
> > Sharlane Grant
> > Preservation Officer
> > State Historical Society of Wisconsin
> > mailto:st.grant@ccmail.adp.wisc.edu
> > 608/264-6474
> >
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> Virginia Kerr
> Preservation Digital Technology Librarian
> Northwestern University Library mailto:vkerr@nwu.edu
> 1935 Sheridan Road VOICE (847)491-7786
> Evanston IL 60208-2300 FAX (847)491-8306
> http://www.library.nwu.edu:80/preservation/
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%