Re: more boring numbers

[Paul Franklin Stregevsky]

JCO wrote:

f/2 +    0.666   =      f/2.519 
f/2.8+   0.666   =      f/3.563 

Thanks, JCO. Now I know that if I add a 1.7X TC to my SMC 200/2.5K, I'll get
a 340/3.6. That sure beats a 300/4.5, which at any rate is really only
280mm.