Pentax K-3.  I got this lens (Sigma 70-210 f4.5) a few years ago from an elderly couple who sold their house and were having a garage sale.  I was interested in their wide angle lens.  They wanted me to take the whole lot (the two lenses, the camera and the bag) for the price of the wide angle lens which was CDN$30.  This Sigma lens has a lot of haze in it.  I used Tiffen Dfx to remove the fog.  It is one of lightest 70-210mm lenses that I came across.