Originally posted by Wolfeye I got my K-3 on a whim b/c it was a great package deal. Comparing it to my other cameras, it lacks the tilt screen and video AF of my Canon 70D, and the AF is generally terrible overall, in comparison, although I don't have any fancy Pentax lenses to test. Images seem noisier than from my Nikon D7100 and I'm sad that Pentax has nothing that compares, pricewise nor in IQ to the cheapo Nikon 35mm 1.8 lens. They offer the 35mm 2.4 but it's not the same.
OTOH I have a 24mp camera with all my Pentax lenses image stabilized so if I want better quality images, I do have good (enough) Pentax-M lenses to use. I'm annoyed that Pentax decided to disable wireless (even non-TTL) flash when you use M lenses. Of course they don't want you to use them, they want you to buy new ones.
Why do you say they don't compare? just because the Pentax is 2.4? My brother and I were together shooting recently, he with his Nikon and 35 1.8 and my with my K20D and 35 2.4. The pictures looked very similar. The IBIS in my Pentax kind of made up for the fact that the lens was a bit slower. I was able to keep up with whatever he was doing in low light except for maybe one picture where his at 1.8 looked better than me at 2.4, when our families were eating at a very dark restaurant. Since we were in a group the f2.4 actually worked well to have everyone more in focus.
During both lenses looked fine, mine had a bit sharper look to the pictures, and his had more saturated colors SOOC.