Lovely pictures! I really, really want to get a hold of a Cosina f1.2 for the bokeh, but I can't even FIND one online.
Anyways, here are some photos all taken with a Pentax K-r.
First: Super Takumar 50mm F1.4 at 1/320 and ISO 200. I don't remember what aperture setting I had it at, but it was probably stopped down just a
itty-bitty bit.
Second: TAMRON SP AF 28-75mm F2.8 XR Di at 75mm, f4.5, 1/250, and ISO 200. I call this one "Reggae Reflections," since this was taken at Austin's Reggae Festival.
Third: smc PENTAX-DA 35mm F2.8 Macro Limited at f3.2, 1/30, and ISO 800. It is cropped to a square.