 | | Rotate to the best orientation. | 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 ofover 20 long eye-relief Tele Vue eyepieces to achieve the sharpest full-field viewing possible.
DIOPTRX™ models are available in ¼ to 3½ diopter (¼ steps from ¼ to 2½ diopters, then ½ diopter steps to 3½-diopters), 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.
HOW TO CHOOSE DIOPTRX™ MODELS
Your prescription may look like this, with different numbers. | | | SPHERICAL | CYLINDER | AXIS | | Right Eye | O.D. | +1.50 | -0.50 | 45 | | Left Eye | O.S. | -0.50 | +1.50 | 135 | - Ignore spherical and axis values.
- Ignore all ± signs.
- Simply choose DIOPTRX™ to match the cylinder (astigmatism) value of your preferred viewing eye. In the example above, you would choose 0.5 diopter model for your right eye and 1.5 diopter model for your left eye.
These adapters convert eyepieces with small eyeguards to larger eyeguards, so DIOPTRX™ can be installed. Note that these eyepieces have shorter eye relief than others recommended for DIOPTRX™, so to minimize any vignetting, it's best to use these for deep-sky applications where your eye pupil is large. | Notes for Use with Bino-viewers | | DEA-0001 | When used for bino-viewers, you may encounter "nose relief" limitations because DIOPTRX reduces the normal eyepiece eye relief. | | DNA-6000 | When used for bino-viewers, remove DIOPTRX, because limited "nose-relief" and eye-relief will prevent seeing the full 82° field. The new larger eyeguards are still fine for use with binocular viewers. |
Tele Vue DIOPTRX™ Technical Notes
Long Eye-Relief Tele Vue Eyepieces that Accept DIOPTRX™Eyepieces with * require noted adapter | | Plössl | 55, 40, 32mm | | Radian | 18, 14, 12, 10, 8, 6, 5, 4, 3mm | | Panoptic | 41, 35, 27, 22mm & 19*, 24*mm (*requires DEA-0001 adapter) | | Nagler Type 4 | 22, 17, 12mm | | Nagler Type 5 | 31, 26mm & 20*mm (*requires DEA-0001 adapter) | | Nagler Type 6 | all* (*requires DNA-6000 adapter) | | Ethos | 6, 8,13, 17mm |
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