Love my Audubon EDs. Have compared images to many others, including Ultralights and regular Audubons, and the view is clearly superior (brighter, mostly). I've only seen a better image in super-top end bins (Nikon E's; very close to Leica and Zeiss roofs, really a matter of judgment). Have never had any fogging problem, despite much wet-weather use, even though the weatherproofing isn't really complete. The weight really isn't bad in the long term, as they fit the hand so well. Although haven't used Ultralights much, strongly advise choosing better image over their lighter package. Spring for ED if you can, of course. You won't find a better image under $600 (or maybe more). Doug Couchman atakdoug@csonline.net Cooperstown, PA