Hello! I went to the toronto Henrys today, and I bought a 28mm F3.5 Pentax super-takumar lens! I paid 80 with 1 year warranty and tax! Also, do I really need a UV filter? The guy at Henrys outlet showed me the durability of a lens by scratching it with his keys, and dropping it on the floor. It still worked well, so should I get a filter? Anyone know anything about this lens? Its not multicoated.