Was wondering what size chest binos do you run? I've tried 12x50 but cannot seem to hold them without shaking and lose field of view. I can't get away from 10x42. I want to be able to run and gun pull them out 1 handed glassing quick hand holding. I'll throw them on the tripod when I can but love my 15x56 for long glassing. I can really pick apart the landscape with those 15's see into brush. What are your thought??