![]() It has a usable eye relief of 13mm, excellent for an eyepiece in this focal length range. The six lens/four group design and two ED (Extra-low Dispersion) glass elements of the 8mm Astro-Tech Paradigm provides all of the optical virtues described at the top of this catalog page - high contrast, a sharp and flat field from edge to edge, excellent color fidelity, and exceptionally low astigmatism and barrel distortion. Its sharpness and lack of astigmatism across the field makes smaller globular clusters vivid and nearly three-dimensional. If so-so seeing is the norm where you observe, its 8mm focal length may represent the shortest focal length practical with a long focal length telescope for observing lunar and planetary detail, resolving globular clusters, picking up small planetary nebulas against a stellar background, etc.Ĭontrast is very good for planetary and lunar use, rivaling that of orthoscopics and Brandons, but with a substantially wider field of view and excellent eye relief. ![]() Below average seeing conditions may limit its performance. This Astro-Tech 8mm Paradigm Dual ED eyepiece is a logical 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. Various Used and Demo Scopes and Mounts.Astro-Tech AT60ED and AT72EDII Black Friday Sale.Explore Scientific Nebraska Star Party Sale.Various Closeouts Meade, Kendrick, Bob's Knobs, JMI and others.Astronomics Used, Demo, Closeout, Spring Cleaning Page.Rechargeable Batteries And Power Supplies.Personal Planetariums / Electronic Sky Guides. ![]() Focal Reducer and Field Flattener Combos. ![]()
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