The Explore Scientific ED APO 127mm f/7.5 Essential sports the new hybrid Rack and Pinion/Crayford Focusers from Explore featuring a dual focus locking system and a 10:1 dual speed focus control. With and Without the ES 3" Field Flattener/0.7x Focal Reducer. The Explore Scientific ED80 was recommended to me by a friend I met on an online astrophotography forum. The Explore Scientific ED102 Essential Series Air-Spaced Triplet APO Refractor Telescope is a true apochromat refractor that reveals our Moon’s stark chiseled craters, Jupiter’s orderly cloud belts and the blue-white stars of the Orion Nebula popping against the complex misty cloud they call home. You also need this for the 2.5" HEX Focuser ES Adapter for FFFR507X-00 to 2.5" Hex Focuser - 510366, Another $80 Bucks.. I am looking for comments about the Explore Scientific FCD100 Series 127mm f/7.5 Aluminum Air-Spaced Triplet ED APO Refractor with 2.5" HEX Focuser. I would like The Good, the Bad and … The Explore ED102 telescope comes with a white aluminum tube with black accents. Click here for the Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor with Unlimited Lifetime Warranty, for high definition astronomical observations! The Explore Scientific is a 127mm/5″ f/7.5 triplet with the center ED lens element being the slightly less desireable FPL-51 Hoya glass. Explore Scientific Air-Spaced Apochromatic Triplets have true APO optic and are diffraction limited at .25PV or better. (866) 252-3811 However, I eventually … Specifications of the Explore Scientific Triplet ED APO 127mm f/7.5 Refractor Telescope Aperture: 127mm Focal length: 952mm He had recently posted another exquisite photograph using the ED80, that showcased the incredible imaging capabilities of this triplet APO. Explore Scientific ED80 Review. The Sky-Watcher Pro 120ED is known to be a great performer with wonderful color correction, especially for a doublet, and comes with some nice accessories such as a 2″ diagonal, 9×50 RACI finder, and a metal case.