Adorama carries the Kenko, Tamron and Tokina. The Tokina is the lowest priced 7 element 2x. I have/have had the Tamron and Promaster 4 and 7 element ones, the 7 element are far better optically.(Tamron and Promaster are identical.) They are very usable but image quality still suffers noticably. After using the Pentax F 1.7x converter I'm very spoiled. I do however use the Tamron 1.4x on ocassion, it's quite good with short/medium teles. Works very well with the Tamron SP90/2.8 Macro.
Don > -----Original Message----- > From: Don Williams [mailto:[EMAIL PROTECTED] > Sent: Wednesday, February 08, 2006 7:24 AM > To: pentax-discuss@pdml.net > Subject: Tokina Doubler > > > Some one mentioned this the other day. There are > two -- one with seven elements and one other. Does > anyone know these things well? I've seen one AF > version on some US dealers page but now forget where. > > Zen would say: "If you don't use them is there any > difference to the quality." > > Don > -- > Dr E D F Williams > __________________________________ > http://www.kolumbus.fi/mimosa/index.htm > http://personal.inet.fi/cool/don.williams > See feature: The Cement Company from Hell > Updated: Added Print Gallery - 16 11 2005 >
