Esprit 80 ED APO Triplet

Esprit 80ED 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. Features: Premium optical materials Short focal length and full frame corrected focal plane Excellent field flatness Precision linear power focuser is standard Metallic high-transmission lens coatings Light-baffled optical systems Telescope tube attachment hardware Zero detectable Color Fringing even on Bright Objects Knife-edge Baffled Optical System