>On Fri 2001-11-09 (11:30), Frank Wajer wrote: >> on kmp.bdimitrov.de I saw the specs of the 200 f2.5 lens. It says that the >> filter >> ring is 77mm, but this means that the lens cannot be f2.5, as that would >> mean >> a minimum 80mm filter ring! >> >> Can anyone explain?
It's not uncommon that lens maximum apertures are marked wider than they actually are. Also, the advertised lens focal length is actually something slightly different. The lens may well be close to f2.5 but the real focal length is shorter than 200mm. Maybe the 200 f2.5 is actually 190 f2.6 or like that ? Antti-Pekka --- * Antti-Pekka Virjonen * Fiskarsinkatu 7 D * GSM: +358 400 789753 * * Computec Oy Turku * FIN-20750 Turku Finland * Fax: +358 2 413 7777 * - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
