Please note: Last regular shipment before Christmas is on December 19, 2024, after which only express shipments can be sent. Our store is closed on Christmas Eve and New Year's Eve. (Close)
High-quality, apochromatically corrected optics with small opening ratio.
Apochromatic refractors (ED APOs) belong to the upper class of refracting telescopes. They can focus three colors (RGB) in the same point by the integration of correction lens(s) (ED elements). This makes the image virtually free of color errors. A special reducer-lens combination reduces the aperture ratio by a factor of 0.75x.