2" EP 30mm superview
To be honest I think I just got a bad one. It had really bad ghosting and kidney beans all over the place was clear in only the inner 40% if I don't count the ghosting. I had one previously and it preformed much better. Again I think it was just a bad one so I returned it.
Decent 2 inch wide field 30 mm
It's a good eyepiece especially the price.
TPO 2” 30mm SuperView Eyepiece
Very happy with this purchase. This is a great eyepiece. The Erfle design is dated, but it was a super wide field design years ago and it certainly works well today. Hard to beat for the money!
Pleasing, Wide Field Views
If you want the widest possible field of view from a 1.25 inch diameter ocular, the TPO 30mm fills this need. You can go with a longer focal length eyepiece, but they all have narrower apparent fields of view. You get a "looking through a tunnel effect." If you go with 20 to 24mm ultra wide angle, you get edge distortions. The 30mm is a perfect compromise: a fairly wide apparent field of view with pinpoint star images to the very edge of the field.
So far I really like this eyepiece. this is the first time buying a 2 inch eyepiece. It's a good eyepiece for not a lot of money.
TPO 30mm SuperView
I have the 50, 30 and 20 mm eyepieces. I am using them through an Orion 10 Astrograph Newtonian and I am very happy with them. They are very clear and the focus is easy. If you are looking for an eyepiece that performs well at an affordable price then consider these. I would purchase them again if something happened to the ones I have now.