As much as I like the pentax K mount cameras, Ive given up on using it for my 35mm system. First off, the nice prime lenses are too hard to find. This is especially confusing because there are plenty in M42 mount. Second, because there arent many on the market, K-mount primes demand premium prices. I see no reason to invest in the system when I can buy similar nikon lenses at half the price.