1 of 1 people found the following review helpful
I bought this eyepiece on the personal recommendation of Al Nagler when he was at Anacortes in July 03, pending the forthcoming Mars opposition. Boy, am I glad I took his advice! This eyepiece allows me to dial in exactly the right magnification for my conditions for my Takahashi FS-128 (f/8.1, 1040mm). Note that the zoom features click stops at 3/4/5/6mm, but you can adjust the eyepiece anywhere between the stops too. My only complaints (minor) would be the 10mm eye relief and relatively small 50 degree FOV. Fortunately I dont wear glasses, and you dont need wide fields for planetary viewing. Besides, its more than made up for by the incredible zoom convenience and sharp, contrasty views provided. Mars never looked better through my scope. Conclusion: If you dont wear glasses, and if you spend time looking at planets through a refractor, then you absolutely need this eyepiece.