Yesterday I happened to visit a pro photographer who uses a 6 megapixel
Canon for much of his work. I noticed a 30x40 (inch) family portrait
propped against the wall and inquired what he had used to shoot it. I
knew he had a Pentax 645 and a Mamiya RB67 and was astounded to discover
that this gigantic image was made with the 6 megapixel Canon. It's
surprising since 8x10 is about the best I can do from my 2700 dpi scans
of 35mm film which is approximately 9 megapixels.
That inspired me to do some experimentation using my refurbished 2
megapixel Nikon digital. The actual resolution of that 30x40 print was
less than 75 pixels per inch. I assumed that there should be visible
pixellation but there was not. I clipped out a 600x750 pixel section of
a 1200x1600 digital image. When sized as an 8x10 it has 75 pixels per
inch and clearly shows a lot of pixellation. However, when upsampled to
an 8x10 having 150 pixels per inch using Picture Window Pro's bicubic
smooting algorithm the pixellation disappears and it's almost as though
additional resolution is apppearing out of the void. I had never tried
upsampling before and I was truly startled to see that it produced a
very good 8x10 print from a fairly low resolution image.
The point of all of this is that, even if the Oly 4/3 system is only 6
megapixels (instead of the 9 I'm hoping for) that isn't necessarily bad.
Chuck Norcutt
Woburn, Massachusetts, USA
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|