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Re: [OM] Digital Zoom

Subject: Re: [OM] Digital Zoom
From: "Paul Farrar" <farrar@xxxxxxxxxxxx>
Date: Fri, 14 Aug 1998 12:26:39 -0500 (CDT)
> 
> I saw an ad for a Sony Hi-8 camcorder  with "digital zoom". The picture
> showed a camcorder which obviously did not have a zoom lens. Does anyone
> know what this is and how it works? Does it have implications for Oly?
> 
> Winsor
> 
> Winsor Crosby
> Long Beach, California
> mailto:wincros@xxxxxxxxxxx

Camcorder zooms aren't that obvious. What still photgraphers call a "zoom"
is called an "optical zoom" in camcorder ads. Digital zoom is cutting
pixels out of the center and interpolating (or sometimes just replicating)
them to full size. One camcorder I saw advertised a 72X "digital zoom"!
Talk about worthless. 

Many camcorders mix "digital" and "optical" with the digital cutting in
when the real zoom stops.

A lot of digital cameras have "digital zooms", too. OMs have the 
equivalent: Cut a 1mm by 1.5mm bit from the center of
a negative, enlarge it to 8x10, and you have a 24X "enlarger zoom".

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