LAST EDITED ON Jun-12-15 AT 08:04AM (MST)[p]I carry 10x42 around my neck & 15x56 vultures in my pack with my tripod. I have not used the viper 15x50, but they say they are good. I'm happy with 15x56 vultures they work for me & were what I could afford. You will get opinions that they are no good & save your money to buy swaros! For me that wasn't an option & I have no regrets on my Vultures. Either choice will be good IMO.