Moose commented:
Of course, shooting the same subject from a given spot, the 600mm lenses
will resolve more detail than the 500mms with the same measured
resolution because of the greater magnification.
------------------------------------------------
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.
In the end, of course, one has to pay attention to the realities of
coma, diffraction, contrast, chromatic and spherical abberation, etc. In
other words, why doesn't your 55mm f/1.2 perform best wide open.
Chuck Norcutt
Woburn, Massachusetts, USA
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|