Hi ... I purchased this scope because I wanted the option to use both the 1.25" to 2 " eyepieces , mainly the 2" because I perfer the larger ocular lens to view thru & the fact it just Oooo's with that high quality(all metal) feel /look giving a vey sharp view. Being able to own a compact go to scope that will give you all that for under $500 & is not made in China really is amazing. I dont know of any scope, waterproof or not that will give what the 72 Megrez does for that price. Yes I know its a trade off between a waterproof refractor like the Pentax 65ED & others but with a little thought /care it will perform longer than me. Since I made my comments regarding my purchase of the WO Megrez 72 FD in this post I have spent a few bucks looking for that one eyepiece which will make this scope all it can be. That being said the new upto date Williams 2 inch erecting prism now comes with the 1.25" adopter so you have the choice for either size eyepiece. As for how much light each eyepiece brings to one's eye still depends on the quality of the erecting prism, scope , with the exit pupil & quality of the eyepiece. I perfer the lower end of power between 15x to 25x. The Vixen Wide Lanthanum eyepieces have a 65 to 72 degree range depending upon which power eyepiece you choose in the mid $200 range. I plan on trying these next , some can be used as either 1.25 or 2" eyepieces. They have gotten good reviews. After reading some reviews on the Naglers(I have never owned one) I just purchased a 2" 22mm type 4 , I purchased it used for a big discount. This nagler has a 19mm eyerelief with a 82 degree & will be 20x on the Williams 72 Megrez. Having a field stop of about 31, Iam hoping it will work with the large 31mm aperature of the 2" erecting prism. If this turns out to be that one all it can be eyepiece in my low power range in a 2" wide , I will then try out some of the higher end 1.25" eyepieces with higher power. I will repost in a few days in case anyone is interested. I will also have a few eyepieces for sale ... gwen