>> I have the SP 90/2.5 Tamron lens with the SP 2x matched >> multiplier. It takes 49mm filters.
> I think my SP90/2.5 Tamron lense has a 55mm filter thread. The Tamron 90/2.5 macro reviewed in Modern Photo of 6/1989 had 55mm filter threads, just like the Tokina AT-X 90/2.5 macro has. (On the other hand, the "fatter" VS1 90/2.5 macro has 58mm filter threads, although both the VS1 and the AT-X lenses have front elements with identical 40mm diameters, by my measurements.) Fred - 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 .
