Hi all!
I was reading an article in American Rifleman of Sept 05 on optics
resolution. (How Sharp is Sharp?) and there is the statement that Resolution
depends on Objective Lens Diameter, and by a function of:
114.3 / Objective Lens Diameter = Resolution in arc seconds (1/60th of a
MOA)
Which is stated that it is a simplified formula for Dawes? Limit????
So a 58mm lens has a resolution of 113.3 / 58 = 2 Seconds of Angle (SOA) ( 1
arc degree = 1 MOA = 60 SOA).
Well I know it is more complicated than this, with lens design and coatings
getting into the issue...
On the other hand high quality long zoom lenses are always BIG (read
sporting a large diameter objecyive)
So....how critical is obj lens diameter on resolution. Amd BTW does a larger
objectve makes that much difference in light collection?
thanks, kostas
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so... no matter what, CHEER UP MY FRIENDS! Life is too precious to jump the
other side of the fence...
kostas papakotas / Clenched Teeth Photography
http://groups.msn.com/clenchedteethphotography
http://groups.msn.com/clenchedteetharticles
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