Visual - Black Diamond Refractors
Astro-photography Evolux ED Doublet Refractors
Astro-photography ED Doublet Refractors
These ED Refractors are built with a two-element air-spaced objective. The second element is made of the highest grade ED fluorite glass (FPL-53). This premium glass choice is a basic warranty for virtually no false colour and high contrast. This is a popular scope amongst astrophotographers, and can also be used for visual observing.
ESPRIT Super APO Triplet Refractors
Esprit 80ED, 100ED, 120ED and 150ED Super APO refractors have a doublet field flattener to get a flat field and minimize aberration and distortion. Their wide 48mm opener ensures a larger and clearer aperture and also extremely minimized halation. Connect the triplet and doublet field flattener with a high precision thin thread to keep the optical axis perpendicular to the image.