>A friend/colleague worked briefly at Lick Observtory in northern CA, where
>a generation or so back one or their peons went crazy, took a .45 into
>the prime focus cage and started shooting at the main mirror. Not only
>didn't the mirror crack (foot-thick annealed glass is pretty close to armor
>plate) but after they painted the little holes black some people claimed
>the seeing had actually improved slightly.
>
>Considering that you don't see front mirror of a cat lens in the in-focus
>section, I'm not surprised that 100f area would be around the threshhold.
>Planar waveforms are amazingly robust.
>
>paul
This implies that we should all be buying bargain lenses with scratched
front elements and blacking the scratches. Hmmmm.
AndrewF
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