I have a dilema. I have a 12.5" f 8 I made in one of Brent Watson's workshops. You know, the one where 8 or 9 people in trench coats wait for the sun to go down and then they all drive seperately to an airplane hanger to grind mirrors. Sounds like something from a Dick Tracy cartoon. Oops, I'm off topic. The mirror and the scope turned out really well. I'm pleased. My dilema is with the eyepieces. I can't find the next eyepiece to fit in to what I already have and I don't understand why. I have my starter scope, a 6" reflector from Orion and 3 eyepieces. The eyepieces are 1.25", 25mm, 17mm and a 10mm Explorer II's from Orion. They cost $28 a piece. My 12.5" scope has a 2" focuser. I bought a 50mm and a 32mm eyepiece from Orion. Optiluxe, $139 and $149. They both work great. The lagoon and swan nebula's looked great, but I wanted more power. Something in the 15 to 20mm range. I looked around and couldn't find that many that are reasonably priced, so I bought a 17mm Lanthanum from Orion. $245. It's a 1.25" that fits a 2" focuser. I tried the new 17mm and compared it to the old and inexpensive 17mm a saw no noticeable difference. I looked at the moon, nebulas, clusters and M31. Not in that order of course. So I'm sending back the new 17mm. I'm within the 30 day period for a refund. Why was there no noticeable difference? Does a 2" eyepiece give you better views and clarity than a 1.25" of equal size? It seems like it should to me. More glass surface in the lens. Please explain this to my tiny little brain. If a 2" eyepiece in the 15-20mm range is where I should go, please give me suggestions on which one to get. Do I need to spend more money for a good lens? I've thought about this and just can't reason it out. Any help would be most appreciated. PS. Thanks for helping me with the mirror Brent.