The 5-element 80/100/120/150 ED Super APO Triplet refractors are identical to the triplet ED120 and triplet ED150 refractors, but they have in addition a doublet field flattener lens to get a 44mm diameter flat field without aberration and distortion. Their M48x0.75 adapter for cameras assure larger clear aperture than the classic M42x0.75 adapter (also called T adapter) and thus eliminates any vignetting (loss of light in the edges) on big full frame cameras.
Main 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
