I feel that your optics are very important. I have worked my way up through the ranks in the bino world and just purchased a pair or Swarovski 10x42 EL and WOW!! i cant even look through my others...looks like you are looking through a screen window. I can sit for hours and my eyes dont bother me from strain! tangolzulu hit it right on...looking through them in the store they all look good but the first night i had mine out i was sold with the quality in the low light condidtion...I still have my others for beating around in the truck etc. but will never carry them in the woods...