Product Overview
An excellent alternative to regular Plossl or Orthoscopic eyepieces.
A High magnification upgrade for your telescope. Enjoy a wide field of view, and greater magnification. Excellent for Dobsonian Telescopes
Kit includes 3.5mm, 5.5mm and 7.5mm
Ursa Major FMC Flatfield eyepieces have a five to six-element optical design that provides surprisingly high performance, generous eye relief and a wide apparent field of view from 60 to 65 degrees, depending on the focal length.
Their Flatfield design with fully multicoated, edge-blackened optics reduces field curvature and enhances brightness and contrast.
The black-anodised 1.25" nosepiece has a safety taper (for a secure fit in the focuser) and is threaded to accept 1.25" astronomy filters.
Each Ursa Major FMC Flatfield eyepiece is beautifully finished with a tactile grip and a fold-down rubber eye cup for comfortable viewing.
Supplied with a lens cleaning cloth and an eyepiece bag.
| Focal Length | Lens Elements/Structure | Apparent Field of View | Eye Relief | Barrel | Coatings | Filter Thread | Field Stop Diameter |
Eye Cup |
| 3.5mm | 6/4 | 60° | 15mm | 1.25" | Fully Multi Coated | M28.5X0.6-3.9 | 3.9mm | Fold Down |
| 5.5mm | 6/4 | 60° | 16mm | 1.25" | Fully Multi Coated | M28.5X0.6-3.9 | 6.4mm | Fold Down |
| 7.5mm | 6/4 | 60° | 16mm | 1.25" | Fully Multi Coated | M28.5X0.6-3.9 | 8.6mm | Fold Down |
