Actually, you can get auto aperture on Sony/Minolta mount with a chipped adaptor, although I don't think anybody made such an adaptor. Alpha mount uses a mechanical aperture stop-down, but electronic communication of aperture info. It's essentially identical to aperture-ring-less FA J and DA lenses in function.
-Adam On 3/2/08, P. J. Alling <[EMAIL PROTECTED]> wrote: > The adaptall mound doesn't work with Autofocus lenses, or more properly > all autofocus lenses have dedicated mounts. In fact you won't even get > auto aperture on these lenses if you get a mount for Canon EOS or > whatever Sony ne. Minolta/Konica calls their autofocus mount. There's > an internal motor to stop down the aperture, and the mount doesn't > supply one. > > > Francis wrote: > > Thanks for your help guys! > > The Pentax A and FA versions I've seen so far are, for me, prohibitively > > expensive (2,000.00 -3,500.00). Do old beaters (that still work) ever > > sell for < 1000 ? > > > > Mike: when you said "You can get an AF version that will work with all > > present Pentax DSLRs" are you referring to a AF version of the adapter? > > Or a newer version of the lens? If the latter, do you know if these are > > also "adaplall" so that if I found one in Canon/Nikon mount I could just > > get a new adapter? > > > > > > Thanks again, > > Francis - (foaming at the mouth) > > > > mike wilson wrote: > > > > Happy birthday. The Tamron is an excellent lens, so close in imaging > capabilities to the Pentax in everything but price that you will find it > difficult to distinguish between them. The manual focus version uses an > adaptor mount that allows you to choose between A, M or screwmount Pentax > cameras. Or most other popular mounts. The adaptors are about £50 new but > not so easy to find like that, these days. You can get an AF version that > will work with all present Pentax DSLRs. Or you could get the Pentax AF 1.7 > converter and the manual version...... > > > > > >>> From: Francis <[EMAIL PROTECTED]> > >>> Date: 2008/03/01 Sat PM 07:59:08 GMT > >>> To: Pentax-Discuss Mail List <[email protected]> > >>> Subject: Need advice about 300mm 2.8 (I'm a lucky dog) > >>> > >>> > >>> Yesterday I turned 5. > >>> And my mommy and daddy gave me a card that said: 300mm F2.8 > >>> > >>> I just about exploded! I've taken tens of thousands of bird photos over > >>> the last few years, all with a good but not quite well suited K200mm 2.5. > >>> > >>> So now the question is which one should I get? Have any of you used one > >>> of the old Tamron 300mm f2.8? Are they A enabled or is it green button > >>> material? And when they say "for canon FD" or for something else, does > >>> that just mean it has that adapter on it? Or are they mount specific? > >>> how about the older Tokina telephotos? Are they good (and cheapish)? > >>> > >>> Any suggestions on this would be muchly appreciated! > >>> > >>> > > > > > > > > > -- > > Vote for Cthulhu. Why settle for a lesser evil... > -- Dr. Jerry Pournelle > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
