I wish I could help you with the comparison, but only have and use the A 70-210/4. It is an excellent lens and is even useable wide open. It should be noted that this is a one-touch zoom meaning that you focus and zoom with the same single ring. If you practice, this can be very fast to do, however, on a tripod, it is easier to get zoom creep. I am not sure about the Vivitar concerning the A setting. That would be a consideration of mine also. If the Vivitar is a pure manual lens, most of the exposure modes would not be available.
-- Bruce Sunday, February 11, 2007, 3:30:46 AM, you wrote: CG> I am looking for an additional lens to complete both my k100d and continue CG> with my k1000 as well. CG> I noticed that there is quite an availability for the pentax A SMC 70-210mm CG> f4 on the internet at very reasonable prices. CG> The other alternative I see is a vivitar 1 series (3rd) 70 210mm f2.8-4. CG> Seems that this lens (according articles) delivers very good optics. CG> Since I havenot use any of the two, I doubt on whcih one is the better CG> choice. CG> The pro for the vivitar seems to me the f2.8, but unsure if the comparison CG> is correct. the Vivitar seems also a bit heavier... CG> thoughts? CG> chr CG> _________________________________________________________________ CG> All things trendy for Windows Live Messenger ... CG> http://entertainment.msn.be/funwithmessenger -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
