Oh, she's a big one. This thing runs totally counter to the concept of micro 4/3. It a big beastie.......it's a constant 3.5 all through the zoom range...that's why. It also is a macro focusing lens. I scored it in a box full of camera stuff that was priced at $100. I bought the box to get the Pentax film camera and 2 lenses that went with it. This was on a Nikon body that the owner was keeping. He claimed it worked fine and I have no reason to doubt him. Glass is free from any defects and the condition in general looks good.....nothing funky going on here. I have no way to test it. It comes with a Tiffen 67mm UV filter attached. It has a kinda loose fitting front cap, but no rear. It also comes in a handsome hard leatherette carrying case. This is considered by some to be a cult classic lens..... you can read more about it here ...... Vivitar 70-210 Series 1 Macro Zoom Lenses - Mark Roberts Photography The price is $50 with shipping included anywhere in the US (Geez, the filter is probably worth half of that). Contact me for prices shipped elsewhere or with any other questions you may have. I have feedback at eBay under user name mikeslps_2 I will also now consider almost any sort of trade.