Hello, i' marcello from italy. i apologize for my english. i live in Rome, own a k200d with sigma 17-70 and tamron 70-300 (lens not up to the body, but up to the owner!). in the future i hope to improve my lens. i also have a pentax M 50mm f1.7, i love it but i have some troubles with the manual focus, so i'm going to buy the fa version f1.4.
after this message, i will have to read a lot. i hope to learn more as possible as i can from you.