A while back I picked up a pair of 7x50 storm king binoculars by Swift at a pawn shop. There is a chip visible in a mirror when looking thru them backwards and I can feel something loose inside them but they are still one of the clearest and brightest binoculars I've ever looked through. I'm not very knowledgeable about better quality optics but if I wanted to find something new comparable to these what would I look for?