Mine is in black as well. All three of the Pentax lenses that I bought for my K-70 body are black. My Rokinon 650Z 650-1300mm f/8-16 zoom is white. It had been sitting in my local camera shop for years. They had originally stocked two, the other in black which sold fairly quickly. After an initial markdown of the white Rokinon one shopper expressed interest, but declined to buy it because it wasn't black. I was not color fussy and so bought it after additional markdowns.I have it in black. It's a great lens, but surprisingly it doesn't get as much use as I thought it would.
With previous versions of this lens, I've always had issues with the infinity focus w
Interesting. Never heard of a lens hunting for focus. Some cameras do, of course.I find all of the Pentax screw drive glass to have some hunting issues in low light.