This dual purpose viewing/imaging Celestron Ultima Duo 8mm eyepiece uses a new eight element/five group fully-multicoated optical system to provide a wide 68° field of view for visual use. Integral 42mm T-threads under the removable roll-down rubber eyecup allow solar system imaging use with a SmartPhone, DSLR, or CCD camera.
The Ultima Duo 8mm is a good choice for high quality/high magnification observing with long focal length refractors, reflectors, or catadioptric scopes under good to somewhat better than average seeing conditions. Its full multicoatings provide high contrast that makes it a good choice for resolving detail in planets and planetary nebulas, while its edge-to-edge sharpness makes smaller globular clusters vivid and nearly three-dimensional.
The 8mm Celestron Ultima Duo is more or less regularly useful with long focal length scopes, but below average seeing conditions may limit its performance. If so-so seeing is the norm where you observe, its 8mm focal length may represent the maximum practical with a long focal length telescope.
Click on the "Telescope Eyepiece Formula" link in the "Formulas" tab above for a calculator that will show you the magnification and approximate actual field of view of this 8mm Celestron Ultima Duo eyepiece with your particular telescope.
This product does not have supplied accessories... or supplied accessories have not been assigned.