After trying all the new 32 mm alphas from Swarovski and Zeiss, I am thinking they are the best birding binoculars you can buy. I have found 30 mm binoculars are in general kind of finicky for eye placement and a little dim in low light, whereas, 32 mm binoculars seem to be a bigger improvement than 2 mm of aperture would suggest. Most good 32 mm binoculars will kill the 30 mm binoculars in almost any situation. Yes, a 42 mm is brighter in low light than a 32 mm, and they have slightly easier eye placement, but it is not enough of a difference to carry the extra weight and bulk. So in my opinion a good 32 mm is the sweet spot for birding and if price is no object the new alpha 32's from Swarovski and Zeiss are the best you can buy. Take your pick of the SF 8x32, SF 10x32, NL 8x32 or NL 10x32. What is shocking is that the 10x32's are just as good as the 8x32's! In fact, they are better in the case of the NL because the NL 10x32 has a bigger AFOV than the NL 8x32 and I noticed no appreciable difference in ease of eye placement. All four of these binoculars are very close to perfect outside of a little glare. They are the best birding binoculars I have ever seen. It is just personal preference to choose the Zeiss or the Swarovski. I picked the Swarovski NL 10x32 because I like the optics slightly better. I feel the edges are a little sharper, and they are a little more transparent. I selected the NL 10x32 over the NL 8x32 because of the bigger AFOV and more wow factor. I don't think there are any better birding binoculars available right now than these four.