I purchased the TE-9Z through Optics Planet/Dvor. I'm very impressed with the Kowa TE-9Z eyepiece. I pair it with a Kowa 664 ED 66mm spotting scope. It's a great combo.
The TE-9Z eyepiece makes sure you take full advantage of the superb optics offered in the compatible Kowa spotting scopes. The eyepiece is usable practically through the entire range of the zoom and offers excellent optics, making it a very versatile eyepiece.
I've had various other spotting scopes, and most eyepieces are the weak link in the design of the scopes. Not the case with the Kowa TE-9Z. It is the best eyepiece I have used on all my spotting scopes. I'm very pleased with it. I believe it is a good value for the money. While not super cheap, it offers generous eye relief through entire zoom, great optics, twist eye cups, and a secure locking system.
I'm very happy with the combo of the Kowa eyepiece and spotting scope. I would absolutely recommend this eyepiece to anyone. When paired with a compatible Kowa scope, you've got a world class setup.
Pros: Usable through entire spectrum, good eye relief, excellent optical quality
This review was written in the old system and had content requirements that are different than reviews written today.