Hi. I am looking for some new binoculars. Santa gave me a pair of Swaro EL 10x32s in 2009. They have gone through a lot! They worked very well for me when I birded in dense jungles. I am back at home in Southern California now and I need some 8x42s or something close to that. I came to browse through the bin forum and I am at a loss as to what NL, SLC, SF and even El (which I own) mean. Could someone please explain? Thank-you.