Tele Vue Dioptrx 1.50; Used, Excellent Condition - $85 including shipping ($75 if picked up locally; I'm in Williston, VT)
This 1.50 Dioptrx from Tele Vue will finally eliminate you having to wear glasses for astigmatism when you're at the telescope! This is in excellent condition and there are no scratches on the lens.
(I am also selling a Tele Vue 41mm Panoptic eyepiece and, if you buy the 41mm Panoptic along with this Dioptrx lens, I will take 20% off the price of this lens and you can have it for $68 rather than $85, shipping included.)
**If you're planning to use the Dioptrx with another lens, please check the Tele Vue Web site to be sure the Dioptrx is compatible with the lens you intend to use.
I will ship within the Continental US only, and only accept PayPal as payment. The item will ship within two days (usually 1 day) after payment is accepted.
From the Tele Vue Web site:
Got astigmatism? Get the "cure".
Your telescope's focuser is used to compensate for your near- or far-sightedness; DIOPTRX™ compensates for your astigmatism. These units attach and lock onto the tops of over 20 long eye-relief Tele Vue eyepieces to achieve the sharpest full-field viewing possible. DIOPTRX™ models are available in ¼ to 3½ diopter and are rotatable for tuning to the best orientation. A series of engraved letters on the barrel helps to monitor orientation. Simply choose the DIOPTRX™ model that matches your eyeglass prescription for astigmatism. All lenses are multi-coated glass in anodized aluminum housings with rubber eyeguards.
1. You're more likely to see a sharper, higher contrast image, because:
A. The Dioptrx is always completely aligned to the eyepiece optics, eliminating aberrations from a decentered mismatch of eyeglass power and astigmatic axis.
B. Dioptrx can be rotated to exactly compensate for the astigmatic axis angle in real time, since both head angle and age can vary your eyesight astigmatic angle.
C. Dioptrx likely has better multi-coatings than eyeglasses, and certainly is better in transmission and reflection reduction than uncoated eyeglass.
D. Dioptrx is more likely to be cleaner than eyeglasses, which may have scratches and smudges from constant use and wear and tear.
E. Dioptrx allows seeing your normal maximum contrast that eyeglasses can diminish (remove your eyeglasses and see how contrast improves in normal vision).
2. You're more likely to see the full field in 100° Ethos eyepieces because your eyeglasses are more limiting in "effective eye-relief".