Esprit 70EDX — 70/490 triplet apochromat The Esprit 70EDX uses a 70 mm triplet objective with a Hoya FCD100 ED element and MHTC coatings. Its 490 mm focal length and f/7 optical system are intended for detailed imaging and visual observing with the appropriate accessories.
Manufacturer model: Esprit 70EDX — 70/490 triplet apochromat · Specifications checked against manufacturer data on 2026-11-04
The Esprit 70EDX uses a 70 mm triplet objective with a Hoya FCD100 ED element and MHTC coatings. Its 490 mm focal length and f/7 optical system are intended for detailed imaging and visual observing with the appropriate accessories.
Focusing and camera rotation
A CNC-machined hybrid rack-and-pinion linear-power focuser provides 11:1 fine adjustment and a 2.8-inch indexed drawtube. The main focuser is fixed, while the drawtube adapter rotates through 360° for framing.
Tube, mounting and transport
The aluminium tube is internally baffled and uses a retractable dew shield. CNC aluminium mounting ring(s), a carrying handle and a 45 mm-wide dovetail are supplied. The OTA weighs 3.2 kg and measures 368 mm retracted or 420 mm extended.
Field correction and accessories
A matched field flattener is optional; the manufacturer specifies a 44 mm image height with it fitted. A matched reducer/flattener is also available separately. An aluminium-framed carrying case is supplied. Eyepiece, diagonal and finderscope are not included.
Exact EDX model checked; 45/75 mm values describe mounting-bar width, not length. Corrected image height applies only with its optional matched flattener. Legacy Esprit package items and camera spacing are not transferred.
Esprit 70EDX — 70/490 triplet apochromat The Esprit 70EDX uses a 70 mm triplet objective with a Hoya FCD100 ED element and MHTC coatings. Its 490 mm focal length and f/7 optical system are intended for detailed imaging and visual observing with the appropriate accessories.
Manufacturer model: Esprit 70EDX — 70/490 triplet apochromat · Specifications checked against manufacturer data on 2026-11-04
