>Message: 5 >Date: Fri, 29 Feb 2008 12:18:22 +0200 >From: "Michael O'Connor" <[EMAIL PROTECTED]> >Subject: Re: [OGD] Orchids Digest, Vol 10, Issue 63 >To: <[email protected]> >Message-ID: <[EMAIL PROTECTED]> >Content-Type: text/plain; charset="iso-8859-1" > >snip >What happens if you project the slide onto a screen and take a digital photo >of the projected slide. I have read that you should not take a digital photo >of a computer screen but I do not know why and if taking a photo of a >projected slide would also be contraindicate. Perhaps somebody on the list >can offer a reason why? If there are no contraindications I would be >interested to hear the results you get Jim. Further some scanners are able >to scan photographic slides. I have a Genius scanner that can do this but >cannot give you the model offhand. It may be cheaper for you to buy one that >can do this rather than pay the money to photolab. >Keep well and kind regards >Mike >South Africa
Photographing from a screen creates three potential artifact defects. Any dust, scratches, etc. on the slide itself will be magnified. Nearly all projectors create 'hot spots' where the light is not evenly distributed at the point it passes through the slide film. Two to Three more 'layers' of distortion are added - the projector's lens; the screen; and the aspect between the projector, screen and camera (impossible to achieve dead-on alignment of the projector, screen surface & camera). This is in addition to the two existing distortion layers - the original camera lens and the receiving camera lens. I use a slide copier attachment for my digital camera. It attaches directly to the 50mm portrait lens. You will need a pure white reflective surface and a reliable, even light source aimed on that surface. Care must be taken to 'fix' the camera's white balance before beginning (with the copier attached & aimed at the white surface. Even with those preparations, the result is less than excellent. I use a second cheap digital camera to record info written on the slide frame in the same sequence. An $80 slide scanner sounds cheaper & easier if it's quality & light source are up to task. Slightly related 'stupid pet trick:' When I was film-based, I had a notebook to carefully record the name of plants I photographed. It took way too long to figure out that with the digital camera and a big memory chip I could just take a pic of the tag... David Janvrin _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
