On Jun 16, 2006, at 11:00 AM, Tom Reese wrote: > From: "Patrice LACOUTURE (GMail)" <[EMAIL PROTECTED]> > >> ... 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, That's why we specified the pixel dimensions for digital images as we did. Assuming a 1024x768 projector, you keep the area of the image constant and the area of the photograph constant so as not to prejudice judges with the "size matters" business. http://homepage.mac.com/godders/projection-formats.jpg illustrates a 2:3 proportion image in H and V orientation fitted into a 1024x768 (4:3 ratio) display space with equal image area. The photos present at the same resolution and quality, regardless of orientation. This issue is different when displaying prints or projecting slides ... you can turn the medium for H and V orientations and use the entire display field. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
