From: "Patrice LACOUTURE (GMail)" <[EMAIL PROTECTED]> > My club organizes every year quite a big contest (as far as a few > thousands candidate photos is considered big), and seriously considered > digital projection along with slides. > We discussed with other clubs and decided that we would not venture into > this yet, mainly for manpower reasons (reception, sorting etc...). > > However, we've often projected digital in various other occasions. > > What we learned: > The quality is certainly behind slide projection, in resolution, and > specially in color accuracy and stability (compared to a reasonably good > slide projector typically available in a club). Maybe it's because the > digital projectors we used were bad, but this proved noticeable with > various recent models. Regarding color rendition, we did not have the > hardware to calibrate the projected image, though. > > The photos are not on the same playing ground not only depending on the > support (digi vs. film), but also depending on the image orientation. > While a slide can be projected vertically and horizontally with equal > quality, the digital imager is a horizontal rectangle. Therefore, with a > 1600x1200 imager, horizontal images will be 1600x1066, while vertical > images will be only 1200*800 (2/3 images like 24x36 and APS-C). The > projected vertical image will be much smaller, with the same dot size, > and will lose more detail.
thank you Patrice. I wasn't aware of the vertical orientation issue. That's certainly food for thought. Tom Reese -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
