kenko

Hi, I want to sell the following photography items. Items for Sale: Tamron 17-50 AF 1;2.8 IF DI II Lens for Canon DSLR Asking Price: Rs 12000/- Item Location: Pune Item Description: Used functional 10/10, cosmetic 9/10, clean glass Objects included for listed item: front & back cover, hood...

Anybody have any experience using them? I want to know if the ones available on ebay at Rs500 or less any good? I know they aren't auto focus, but are they going to damage my camera mounts. The other option is to get an auto-focus one, but they are expensive. There is a Vivitar one for Rs5000...