I went to my first PhotoExpo in NYC today (I knw, what took me so long). I had questions for Canon re: my printer and the red color cast, Vivitar as to whether they are still making the 2x 7 blade TC. and Tamron as to whether they will be making any more PK mount lenses. I get to call Canon tomorrow for a walk-through of my problem; Vivitar guy defiantly tells me there's "no demand" for Pentax, saying he supplies B&H and Adorama (both of whom have it listed on their websites as backordered. I ordered one from B&H when there was no backorder posted but now there is. I'll have to cancel my order tomorrow. Tamron practically sneered at me when I asked my question. But what could I say? Ricoh/Pentax was nowhere in sight nor listed on the directory. I have a K-5. I could use a 2.8 70-200 lens for portraits. Do I invest in a Sigma? This is just very discouraging. I've been happy with my camera and lenses wide angle (Tamron and Pentax kit 18-55), DA 50-200 and DA 50-300 (2-one broken (dropped)) a Tamron 90mm 1:1 macro and a Rokinon 85mm 1.4 manual focus. I do landscape, flowers/plants, candid and posed portraits. Do I get the 55mm 1.4 for posed portraits? a 50-135 or a 17-70 the latter two are fastish lenses and all are SDM which have had problems. This is a very unhappy situation.