DIOPTRX™ Product List Eyepiece Accessories DRX-0050 0.50 DIOPTRX Astig. Corrector DRX-0100 1.00 DIOPTRX Astig. Corrector DRX-0150 1.50 DIOPTRX Astig. Corrector DRX-0200 2.00 DIOPTRX Astig. Corrector DRX-0225 2.25 DIOPTRX Astig. Corrector DRX-0250 2.50 DIOPTRX Astig. Corrector DRX-0300 3.00 DIOPTRX Astig. Corrector DRX-0350 3.50 DIOPTRX Astig. Corrector See our How the Split Ring Adapters Work video to learn and troubleshoot the operation of this accessory.