According to a test in Practical Photography (GB) November 2002 the Tamron is better wide open. And in a test in Practical Photography (GB) November 2000 the true focal length of the Sigma is only 95 mm - the 90 mm Tamron is 87.4 mm - and also in this test Tamron is a bit sharper. They both get the same rating 9/10, though. In this earlier test Pentax 2.8/100 FA macro gets only 6/10 and according to the graphs it needs stopping down to f:8 to perform. Verdict: "look elsewhere". I´m still happy with my Sigma. All the best! Raimo Personal photography homepage at http://www.uusikaupunki.fi/~raikorho
-----Alkuperäinen viesti----- Lähettäjä: Ivan Prenosil <[EMAIL PROTECTED]> Vastaanottaja: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Päivä: 24. joulukuuta 2002 1:17 Aihe: Re: Which macro lens ? >Very small disadvantages of Tamron SP 90/2.8 Macro are >- shorter working distance >- non-Pentax filter diameter (55mm) > (AFAIK, Pentax use 52 or 58mm, nothing between) > >Ivan > >
