This is a handy lens for APSC. It's reasonably sharp, gets closer than the 55-300, and unlike my 500mm mirror, actually produces more detail in an image than the 55-300. (500 mirror is murky and blurry in comparison, meaning that an image straight out of the camera taken at 300mm with the DAL55-300 lens actually looks better upscaled than the 500mm mirror looks, even after sharpening and contrast adjustments)
The Sharpshooter works well in APSC because it's light, and because the Kx and K-01 have such great high ISO sensitivity it's easily hand-holdable. It does have some CA though.
This CA is rather bad on the Q. The purple (and red/green for OOF areas) fringing at f6.3 is so bad it's hard to tell if you're looking at purple fringe, or focus peaking. It's better at f/8. Colors are surprisingly bold, rich, and saturated. I was expecting low contrast from what others have written about this lens, but I find it to be nice and contrasty. I will compare this to my 55-300 and 500mm mirror once sunlight conditions are similar (overcast today :/).
Overall, the fringing at f/8 is rather large and unfortunate. The lens is usable, but it's not really a good fit for the Q. Stopping down more than f/8 is going to decrease resolution, and I'm already shooting on a tripod at ISO800, in order to get shutter speeds right around 1/1000. That's still not hand-holdable on the Q, almost entirely due to the jello effect with the Fotodiox adapter. It's also easier to focus stopped down, because the fringing is so bad wide open that I can't tell what's fringe and what's peaking.
Anyhow, I paid $50 for the lens, and plan to use it on the K-01 more than the Q, so I'm not really upset. Not in the least
f/6.3
f8
Charles.