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A world's standard in telescope oculars, the Meade Series 4000 8.0-24.0mm eyepiece yields the widest possible viewing field consistent with pinpoint edge-of-field sharpness and long eye relief, and yet does so with extremely low astigmatism, spherical aberration, and off-axis color.
The Series 4000 8.0-24.0mm eyepiece includes a soft rubber eyeguard, custom fitted with a bayonet mount. The eyeguard folds down for eyeglass wearers, and shields eyeglasses from coming into contact with the metal eyepiece housings. A rubber grip is provided.
Conceived by one of the world's leading designers of photo-optical instruments, the 7-element system in the 8.0-24.0mm zoom provides an apparent field of 40° at the 24mm setting, increasing continuously to a 55° field at 8mm. The internal zoom optics move on smooth, precisely machined surfaces which maintain optical collimation at all zoom settings. A scale graduated in 1mm units indicates the zoom focal length in operation. All its lenses are multicoated for maximum light transmission and image contrast, minimizing internal reflections, and the chromed brass barrel is threaded for 1.25" filters.