So back in January, I accidentally didn't fully secure my Konica Hexanon 40mm f1.8 lens to the adapter and it fell on the ground. It has a B+W UV filter and thankfully, nothing internal got messed up. In fact, it still takes great photos! The only problem is that a small portion of the front of the lens and the filter is dented, so I can't twist off the filter and I can't screw in another filter, ie. circular polarizing filter. After being cool with it, I decided that maybe it's time I just replace it altogether. Also, I have a 57mm f1.4 that I hardly use, so I'm thinking maybe I can sell both off. Do you think I should just replace it with another 40mm f.8 or get the 50mm f1.4? Would it be better to get another lens altogether? If I get another 40mm, should I just keep the 57mm? I'm looking at the 40-55mm prime range, something sharp and contrasty and fast! Thanks!