Agreed, but the effect I'm talking about doesn't depend on that
phenomenon, only that resolution isn't any worse.
And how does that work with a cadioptric lens? I did some measurements
of mirror lenses and found that the 0f total aperture taken up by the
secondary mirror mount varies quite a bit, which might affect this
resolution thing, although it always seems to be properly subracted in
calculating the effective f-stop.
Moose
Chuck Norcutt wrote:
Separated from the ugly realities of real optical design and
manufacture, the _theoretical_ resolution of a lens increases with its
diameter. A 600 mm f/8 has a larger objective lens diameter than a
500 mm f/8 and thus a higher theoretical resolution. Resolving power
and light gathering ability are why large diameter telescopes are to
be preferred over smaller ones.
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