Higher end models have the "light touch" button for faster reaction and better control and feel. That is, there is no clear border for the half pressed position to fire the shutter. Properly implemented "light touch" button has gradually increased resistent/reaction force, however, this is not for the case of the K20D. So, the feeling may not be as good. Tried the Pentax MZ-S or higher end Nikons and Canons and you will see the difference.
Originally posted by Riktar Every other Dslr I have used (Various Canons up to 40D, Sigma SD14, Nikon D90) have a "feel" of the shutter button moving halfway through it's travel to achieve focus/exposure, etc. and pushing further will take the picture. It is a small but very perceptible amount of movement in the shutter button.
On the K20D I notice no movement. Rather it feels like applying just the right amount of pressure will put the camera into it's auto focus routine, and then further pressing down (I can feel this movement) will make the camera fire.
If this is the nature of the camera, fine. But if not I want to consult with the store I bought it from.
What makes me wonder about this is the fact that according to ExifTool the camera already had 600+ shots on it according to the first picture I downloaded on my computer.
This has me wondering if I bought a "floor" model that was used for consumer demonstration.
I hope I am explaining this correctly.