On Fri, 03 Jul 2009 19:26 -0700, "Francis" <fran...@islandlight.ca> wrote: > Hi Pentaxians > Do you know if Tamron's SP 300mm f2.8 (60B) is compatible with Pentax > DSLRs or not? > I bought one of these lenses this spring to use for wildlife photography > on my Pentax K20D and when it arrived (looking almost new) it seemed to > have sharpness issue which I was not familiar with. The images are very > soft (in an odd way) and "fringy" when the lens is used wide open and > only become sharp after about F6 or F8. I have uploaded a sample photo > at: http://www.islandlight.ca/fm087749-100-crop.jpg it is a 100% crop at > f2.8 on a tripod. > > I sent the lens in to Tamron Canada who didn't fix (or find) the > problem, but fixed the mount instead. They said that if there was a > problem that they had missed (the technician hadn't actually tested it > because they had no adaptall mount on hand to test it with :( ) that no > one would fix it because it was discontinued, but indicated that the > problem was just that it wasn't designed for digital media. > > Do you know anyone who has used one of these lenses on a Pentax digital? > Should I invest in sending it to Tamron USA (who said they could likely > fix it) or is it just not going to work with a digital SLR. > > Thanks for your help,
I don't have the 300 f2.8 but I have several Tamron SPs (all Adaptall 2) which work just fine on my *istDS and K200D. Cheers Brian ++++++++++++++++++++++++++++++++++ Brian Walters Western Sydney Australia http://members.westnet.com.au/brianwal/SL/ -- -- http://www.fastmail.fm - mmm... Fastmail... -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
