The Explore Scientific ED102 air slit triplet apo is the pride of the pprofessional family of ED lens binoculars, a precision instrument with both optical and mechanical accuracy and a demanding quality finish.
Whether you want a bright (f/7)optic with a large enough field of view for astrophotography or a compact astronomical telescope with image quality to meet your perfectionist needs for visual observation, the Explore Scientific ED102 air-gap triplet apo will not disappoint.
The triplet apo, as its name suggests, consists of three optical elements with the central member made of Hoya FCD-100 glass material, thus eliminating chromatic aberration from imaging as much as possible. The superior glass material chosen for the binoculars, the precise design and machining, and the multiple anti-reflection layers of (EMD Coating) applied to all glass/air surfaces, result in beautiful, contrasting, detailed and saturated colours. The anti-reflective coatings not only protect the instrument from harmful reflections, but also contribute significantly to maximum light utilisation.
The short aluminium tube of the Explore Scientific ED102 apochromatic telescope can be reduced in size even further thanks to the retractable dewcap. The 1:10 ratio of its 2.5-inch Hexafoc Crayford microfocusing eyepiece allows ultra-precise focusing for both photography and visual observation. The 65 mm free aperture of the 2.5-inch focusing eyepiece allows for edge-to-edge photography even when using cameras with large sensors. To ensure that portability of the tube is not a problem, the tube ring is held in place by a prism rail with a Vixen-standard steel anti-impact plate at the bottom,and a hand grip on top, which incidentally also greatly increases stability, although its main function was to provide easy safe portability and it does this nicely.
The tube weighs 4 kg without accessories and 5.4 kg with accessories. The package also includes two threaded extension tubes and the included 2-inch music mirror with 99% reflectivity!