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Re: cameras used

Put this idea of resolution another way:( a little over 
simplification but it worked in my High School physics classes)
	The real world is made up of molecules. We see them with 
light rays. Light rays are smaller than the atoms which make up the 
molecules we see. Our eyes see light rays but there are only a 
limited number of rods and cones in our eyes to pick up those rays. 
However, we can get closer and closer to the subject and spread those 
rays across our rods and cones.
If we get closer, and do it with a glass magnifier we still use most 
all the rays coming from the subject. If one uses an electronic set 
of "rods and cones" there are only a limited number of them even if 
there are mega pixels it still isn't as good as using all the rays 
through a magnifying glass (camera lens). The best picture which can 
be achieved is with the rays of light. The larger the lens is, the 
more rays can come through it. More energy means being able to see a 
subject better. A large lens and the distance from lens to sensor( 
film or electronic pixel sensor) leads us to *f* stop and depth of 
field which many of the snap shot cameras have over the finer 
cameras. They can take pictures at lower light and they sell based on 
part on that.

Wright said:
>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 picked a Sony FD88 Mavica for electronic imaging. 16X Zoom 1.3 
pixels. The pictures on http://www.thermark.com were all made with 
this camera. However, nothing I have seen matches a reflex camera 
with 64 speed color film for the best photographs.

By the way, what is the max resolution of your computer screen? and 
How many colors?

Put your money on the magnification or the optical zoom not on the 
electronic pixel count. The electronics have come a long way but I 
don't look to replace my 35 mm film camera anytime soon.

Charles Harrison
-- 

http://www.InkForYourPrinter.com
for all your hard copy needs since 1987.
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