T3D Re: digital camera resolution

[John Ohrt <johrt@xxxxxxx>]

Michael Kersenbrock wrote:

> Just a comment that the digital camera article mentions that the
> cameras *do* have an optical nyquist filter up front.

I don't know what they mean!!!! There is no need for an optical Nyquist
filter on a digital or film camera because both the ccd and film are
integrating detectors!!  

Maybe nyquist filter = lousy optical quality.  Typically you want your
optical resolution 3 to 5 times better that the detector resolution so
that cruddy optics do not degrade the overall image quality but
conversely you don't purchase needless overkill.

--
John Ohrt,
Toronto * Ontario * Canada


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