At 19:54 5.3.2003 -0500, Paul wrote: >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.
Actually, if you add a 1.7X TC to your 200/2.5 you'll get a 340/4.25, right ? With a 1.4X TC the result would be close to f/3.6. Antti-Pekka --- * Antti-Pekka Virjonen * Fiskarsinkatu 7 D * GSM: +358 500 789 753 * * Computec Oy Turku * FIN-20750 Turku Finland * Fax: +358 10 264 0777 *
