GSO 40 mm Plossl Eyepiece

GSO's Super-Plossl eyepieces have been some of our most popular sellers over the years. Users will experience incredible views without breaking the bank or impinging on your telescope's balance. They represent what is perhaps the best buy today for astronomers on a budget or for beginners. But don't be fooled by their low prices—these might well turn out to be all the eyepieces you will ever need!

The 32mm and 40mm models offer a wide field and are superb for wide field scanning, detailed observations of large diffuse subjects or as a finder eyepiece.

Features:

• All eyepieces are fully multicoated (FMC) for maximum light transmission
• High-quality lenses provide the best-possible sharpness all over the field of view
• Blackened lens edges reduce light scattering and improve contrast
• Fold-down rubber eyecups to keep out stray light
• Comfortable eye relief at all but the shortest focal lengths (As in all Plossl eyepieces, eye
• Relief can get tight at the shorter focal lengths but this is design constraint, not a fault of these eyepieces.
• Includes two end caps
• Focal length:  40 mm
• Apparent Field of View: 43 deg
• Clear Aperture: 25 mm
• Eye Relief: 19 mm
• Barrel Size: 1.25 inch
• Real Field of View: 103' (in the case of a telescope with 1000mm focal length)
• Magnification: 25x (in the case of a telescope with 1000mm focal length)