Not necessarily, www.keh.com (a very reputable company that I have had many dealings with and they are also an Apug sponser) has these lenses:Originally Posted by roteague
70-210 F3.5 VIVITAR SER 1 MACRO AI (62) 35MM SLR MANUAL FOCUS ZOOM TELEPHOTO LENS $56.00
This is the fixed aperture version of the Vivitar Series 1 70-210
70-210 F4 KIRON MACRO AI (62) 35MM SLR MANUAL FOCUS ZOOM TELEPHOTO LENS $35.00
I have heard many espouse the Kiron lenses as being above reproach. Kiron also made many of Nikon's lenses (such as the 70-150 series E which is highly touted).
If you are wanting a zoom lens then I suggest buying the Kiron lens from www.keh.com Even with 2-day UPS shipping it is cheaper than the Vivitar from the repair shop.