09-04-2014, 11:13 AM
Quote:Just looked it up, the standard 70-300 version is 630g, and the DO is 720g. At 143x77 and 100x82mm respectively, the DO is shorter and wider.The Tamron 18-270mm is not 88mm long at 270mm, is it? How long is it at 70mm?
I'm not sure there is a problem making smaller zoom lenses at longer focal lengths. Look at the Tamron 18-270 (PZD version) for example, that's stated as being 88mm long.
I think quality is a trade off for smaller lenses in a given class regardless.