The slower is a consumer grade zoom, while the 3.5 constant aperture is truly a 2.8 class zoom. I've seen shots taken with it wide open and resolution and contrast are remarkable. Besides, it is very well built and has the best ergonomics design I've seen at a one touch zoom. Servus, Alin Frantisek wrote: > I have been looking for a good zoom in the 70-200 range, with enough > speed for my needs. Until recently, with not much luck. But now I > found several offers for this Tamron SP 70-210 in Exc conditions. > What is the difference between the SP 3.5/70-210 and SP 3.5-4/70-210 > (except speed) ? I think to remember that the slower is two-touch > while the faster one-touch. I think also the latter focuses closer. > But what is the difference in image quality, "resolution" and > "sharpness" (also Bokeh) between these two Tamrons? The 3.5-4 is > generally cheaper, but that doesn't tell much about the quality. - 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 .
