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I saw this SMC Pentax-F 70-210mm lens on eBay and after reading the question asked of the seller, I decided to put it on my "watch list." I already have one of them and it's a superb lens, but cosmetically, it leaves a lot to be desired. It is, without question, one of the sharpest lenses I own. I call it my "tractor lens," because it looks and sounds more like a farm implement that a camera lens! The violent auto focus was startling the first time I used it! But, the images is produced quickly belayed any noise issues I might have had.
So, getting back to the subject of this post. The lens was being sold "As is,for parts only" but the question to and answer given by the seller made me think that maybe.... just maybe, he didn't know anything about lenses in particular and was selling it As Is because he didn't have any way of testing it. His other items he had for sale were odds and ends, kinda' like yard sale items. This too piqued my interest.
So, I ended up being the only bidder at $17.00. Another Pig in a Poke, but I've struck gold more than once by going out on a limb like this. We'll see.
Pentax SMC Pentax F Zoom 1 4 5 6 70 210 Mm | eBay