I bought this eyepiece for use with a TV102 specifically for viewing the planets. I already had a 4mm Radian, and was considering filling out some additional Radians in the 3mm-7mm range. Adding up the cost, I decided to give this one a try. In my opinion, brightness, contrast and sharpness are every bit as good if not better than the my 4mm Radian. And it zooms! I think it outperforms everything in my box for the planets. Absolutely incredible for a zoom and smaller than even one Radian. Small FOV, but absolutely spectacular for high power planetary viewing. Worth every penny.
Thank you Craig.
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