Astromania Zoom Eyepiece, 8-24mm Aspheric Telescope Lense FMC Zoom Lens

Versatile Zoom Functionality: 8-24mm zoom eyepiece provides steplessly variable focal length to use different magnifications anywhere between 8 and 24mm; concentrate on using one eyepiece and keep object in view while slowly increasing the magnification Advanced Aspherical Glass Design: Featuring premium aspherical glass lenses with 6-element fully multi-coated technology; effectively reduces image distortion and aberrations for providing clearer high-contrast and wider view of astronomical picture Precision Adjustment System: The rotational zoom mechanism enables precise focal length adjustment from 24mm to 8mm; Optimized for 15-20mm eye relief and 43-66 degree apparent field of view accommodates both eyeglass wearers and direct observation Triple Connection Compatibility: Equipped with removable 2 inch barrel that can be attached to telescope with 2 inch focuser while bottom comes with 1.25 inch barrel & 1.25 inch female filter thread for telescope with 1.25 inch focuser & 1.25 inch filters Professional-Grade Detailed Design: All metal alumnium construction for extending one's using cycle; twist-out eyecup for stray light protection & suitable for spectacle wearers; black oxidized surface of lens barrel effectively reduces light reflection