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More Information  · Recommended Accessories Price $67.95 List Price $102.95 Field of view 55° Eye Relief 20mm Focal Length 8mm Number of optical elements 6 Barrel Size 1.25" Warranty 2 years Telescope Eyepiece Formula To calculate the magnification and approximate actual field of view of this eyepiece on your telescope, enter the focal length of your telescope below and press the "Calculate" button. mm

Its five-layer fully multicoated six-element ED (extra-low dispersion) glass optical design is also quite good for medium power viewing with short focal length refractors and fast focal ratio Dobsonian reflectors. Good contrast makes it a sensible choice for resolving detail in planets and planetary nebulas, while its edge-to-edge sharpness makes smaller globular clusters vivid and nearly three-dimensional.

It 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.

A soft rubber eyecup shields the eye from ambient light and rolls down for more comfortable eyeglass use. A knurled rubber ring on the barrel provides a secure grip when changing eyepieces in cold weather.