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Re:cameras used
Wright this is great stuff for me although I'm not an optical engineer.
I thought that Sony uses their Video camera lenses in their digitals as
well.
Are those video camera lenses better than what eg.Nikon, Canon has to offer?
My 35mm camera is a Leica R4 with Leitz Summarit lenses and I might be wrong
in saying that my 990 pix are as good as those R4 pix.On the other hand I
never blew any R4 pictures up.
The higher Resolution 2048x1536 is also great for editing purposes
,especially cropping.
You have to hold two of the same images next to each other, one done in
1600x800 and one done
in 2048x1536 then cropp parts of the picture to see the difference.See the
Megapixel article that I mentioned in my previous post.That's exactly what
they did.
May I have your permission to post parts of this interesting discussion on
my website?
Thanks for your excellent input.
Max
Wright wrote:
That is not true. Perhaps you are overlooking some assumptions? The camera
marketing types are *eager* for you to do so, for the pixel race has sold a
*lot* of snapshot cameras.
Only if the *lens* can resolve details as small as a single pixel, is that
statement generally true. As soon as lens resolution (or focus, etc.)
provides details that are all larger than the pixel size, then you have
essentially "empty resolution." About 90% of the consumer digital cameras
have lenses that cannot possibly resolve to the capability of a 3 MP CCD.
If the tiniest image of a perfect point source is covering 20 pixels, then
another point source next to it, but displaced by only one pixel, will not
be resolved as a separate point. It's that simple.
The consumer cameras often use very poor lenses designed for low-res video
cameras, to get a huge zoom range. Folks don't seem to care.
I downloaded the USAF test chart from the web, and proved to myself that the
lenses were the real limit to resolution of several cameras I considered,
and the absolute number of CCD cells was unimportant. My Sony 770 has only
1.5 MP, but I can do 8X10 prints that cannot be told from film pictures,
with it. Internal algorithms and progressive scan make it the equal of all
but about 3 cameras with higher MP, and you don't want to pay for any of
them.
Wright
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