Televue DIOPTRX Astigmatism Correction Telescope Lenses, Televue DIOPTRX Lens Models: Tele Vue 1.50 DIOPTRX Astig. Corrector, DRX0150 (Model: DRX-0150). Televue DIOPTRX Astigmatism Correction Telescope Lenses compliments your telescope ?s focuser used for near or far sight conditions by compensating for your astigmatism using Tele Vue DIOPTRX Technology (lenses to correct eyesight astigmatism without needing eyeglasses). These Teleview units attach and lock onto the tops of over 20 long eye-relief Tele-View eyepieces to achieve the sharpest full-field viewing possible. Tele-View Astigmatism Corrector DIOPTRIX Telescope Lenses consist of a series of engraved letters on the barrel that helps to monitor orientation; all telescope lenses are multi-coated glass in anodized aluminum housings with rubber eyeguards, and are rotatable for tuning to the best orientation. Tele Vue 's available DIOPTRX Astigmatism Corrector Telescope Lens models are available from ¼ to 3½ diopter (¼ steps from ¼ to 2½ diopters, then ½ diopter steps to 3½ diopters) in order to match your eyeglass prescription for astigmatism.Available Televue DIOPTRX Astigmatism Correction Telescope Lenses Models: DRX-0025 - Tele Vue 0.25 DIOPTRX Astig. Corrector, DRX0025 DRX-0050 - Tele Vue 0.50 DIOPTRX Astig. Corrector, DRX0050 DRX-0075 - Tele Vue 0.75 DIOPTRX Astig. Corrector, DRX0075 DRX-0100 - Tele Vue 1.00 DIOPTRX Astig. Corrector, DRX0100 DRX-0125 - Tele Vue 1.25 DIOPTRX Astig. Corrector, DRX0125 DRX-0150 - Tele Vue 1.50 DIOPTRX Astig. Corrector, DRX0150 DRX-0175 - Tele Vue 1.75 DIOPTRX Astig. Corrector, DRX0175 DRX-0200 - Tele Vue 2.00 DIOPTRX Astig. Corrector, DRX0200 DRX-0225 - Tele Vue 2.25 DIOPTRX Astig. Corrector, DRX0225 DRX-0250 - Tele Vue 2.50 DIOPTRX Astig. Corrector, DRX0250 DRX-0300 - Tele Vue 3.00 DIOPTRX Astig. Corrector, DRX0300 DRX-0350 - Tele Vue 3.50 DIOPTRX Astig. Corrector, DRX0350Here is a list of DIOPTRIX-accepted Televue Eye Pieces: Long Eye-Relief Tele Vue Eyepieces that Accept DIOPTRX Plössl 55, 40, 32mm Radian 18, 14, 12, 10, 8, 6, 5, 4, 3mm Panoptic 41, 35, 27, 22mm Nagler Type 4 22, 17, 12mm Nagler Type 5 31, 26mm Zooms Click Zoom DIOPTRX-ready Features of Tele Vue DIOPTRIX Astigmatism Correction Telescope Lenses: Compatible with Televue Telescopes Tele Vue DIOPTRX Technology compliments telescope focuser A variety of lenses to match your astigmatism Fits a majority of Televue eyepieces used for long eye-relief TeleVue 5-year warranty applies on all TeleVue products for the original owner.Package Contents Tele Vue DIOPTRIX Astigmatism Correction Telescope Lens Warranty