Nah, you forget correction needed for aberrations. And things are never equal in the real world. Not many single element designs even now. But I admit that there are some excellent lenses with small number of elements and in some cases (Leica) newer designs with fewer elements have improved correction. And good designers achieve more with fewer elements than not-so-good designers with more elements. All the best! Raimo Personal photography homepage at http://www.uusikaupunki.fi/~raikorho
-----Alkuperäinen viesti----- Lähettäjä: J. C. O'Connell <[EMAIL PROTECTED]> Vastaanottaja: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Päivä: 22. tammikuuta 2003 20:44 Aihe: RE: Vivitar 35-85 better than Pentax 24-90? >It's still true today, all else being equal, a lens design with >less elements will be sharper and more contrasty than one with more. >For a given focal length and speed, there is an "ideal" number >of elements to optimize the design. More does NOT always >equal better when it comes to lens elements. >JCO > >> -----Original Message----- >> From: Raimo Korhonen [mailto:[EMAIL PROTECTED]] >> Sent: Wednesday, January 22, 2003 12:26 PM >> To: [EMAIL PROTECTED] >> Subject: Vs: Vivitar 35-85 better than Pentax 24-90? >> >> >> It used to be so before World War II because of un-coated lenses >> - but not anymore, even less with multicoating. Not many >> single-element designs around ;-) >> All the best! >> Raimo >> Personal photography homepage at http://www.uusikaupunki.fi/~raikorho >> >> -----Alkuperäinen viesti----- >> Lähettäjä: J. C. O'Connell <[EMAIL PROTECTED]> >> Vastaanottaja: [EMAIL PROTECTED] <[EMAIL PROTECTED]> >> Päivä: 22. tammikuuta 2003 2:04 >> Aihe: RE: Vivitar 35-85 better than Pentax 24-90? >> >> >> > >> > >> >> -----Original Message----- >> >> From: Andre Langevin [mailto:[EMAIL PROTECTED]] >> >> Sent: Tuesday, January 21, 2003 7:44 PM >> >> To: [EMAIL PROTECTED] >> >> Subject: RE: Vivitar 35-85 better than Pentax 24-90? >> >> >> <snip>Less elements for the same amount of >> >correction means more contrast/resolution. The vivitar >> >series 1 varifocal lenses were made that way for maximum image >> >quality, not to save costs, they were MORE expensive than >> >similar true zooms of the time they were made. >> >JCO >> > >> >
