From: "Cary Chleborad" 
To: "John Sherman" , 
Reply-To: "Cary Chleborad" 


Here's one for you:

Shorter f-ratios give smaller airy disks.

-Cary


>The reason I bring this up is because the question is whether there is any
>"optical" benefit to a f/4 over a f/6. I still haven't heard
of one. The
f/4
>has to be corrected by auxiliary optics to provide as pleasing of an image.

>The f/4 does provide lots of practical benefits aside from the optical
>quality, as has been pointed out.

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