Explore Scientific ED APO 102mm f/7 Essential Refractor Telescope with Hex-Focus

Explore Scientific ED APO 102mm f/7 Essential Refractor Telescope with Hex-Focus


Available - Delivery 7-10 working days.

Model:  es_ed102_ess
Part Number:  0112107
Brand:  Explore Scientific

Explore Scientific


  • Telescope OTA
  • Tube rings with Handle
  • Vixen-style Dovetail

102mm f/7 air-spaced triplet with a Hoya FCD1 ED glass element and 2.5" dual speed Hex focuser.

Building on the success of the original Explore Scientific 102 Triplet Apo, Explore Scientific now release their best ever value 4-inch telescope: the Explore Scientific ED APO 102mm f/6.7 Essential with Hex-Focus.

The Essential series are "bare bones" versions of the Explore Scientific Apos - they still have the exquisite optics of the original triplets, including Japanese Hoya FCD1 Dense Fluro-crown and Explore's Special EMD™ enhanced multi-layer coatings on every optical surface for the utmost in colour-free performance and still have the high strength aluminium tubes, internal baffling systems and hyper-blackened edges for the ultimate in contrast. However, the Essential Series Triplets leave it up to you to provide Diagonals, Finders and other accessories - passing on the savings to you as a result. 

The Explore Scientific ED APO 102mm f/6.7 Essential sports the new Hex Focus Rack and Pinion/Crayford Focusers from Explore featuring a special geometric design tube with a hexagonal tube and the prismatic counterpart which ensures a formidable rigidity and no flexure. In addition to this, the Hex-Focuser has a 10:1 dual speed focus control. In addition to this the optical tube assembly comes with Vixen-profile mounting bar and rings, featuring a handle with camera mounting rail.


  • Three lens air-spaced ED-apochromat
  • Aperture 102mm; Focal length 700mm; f/7
  • Hexafoc DeLuxe 2.5" Focuser with 10:1 fine focusing
  • Tube rings with handle
  • Handle features mounting place for cameras
  • 44mm universal dove tail mounting plate with stainless steel protection included


  • Aperture: 102mm
  • Focal length: 712mm
  • Net weight 4.1kg w/o tube rings, 5kg including tube rings

Standard accessories:

  • Optical tube assembly with rings
  • Handle with camera mounting feature
  • Hex-Focuser Focuser with 10:1 reduction

The Explore ED102 Essential Edition telescope comes with a white Aluminium tube with black accents. 

Explore Scientific Air-Spaced Apochromatic Triplets have true APO optic and are diffraction limited at .25PV or better

Genuine ED glass from Hoya Japan is used on all ED APO Triplets at Explore, for superb quality and light throughput

Enhanced Multi-Layer Coatings (EMD) are deposited on optical elements to boost contrast and eliminate light scatter; and contrast is further enhanced with the installation of matte black knife-edge baffles in the optical tube assembly. 

While refractors seldom require additional collimation after initial factory adjustment, the lens cell design allows for consumer collimation. Sending your ED102 Triplet off to the factory is always an option, but is not required. 

Dedicated Field Flattener available as an optional extra in both 2 and 3-inch options.

There are currently no specifications available for this product.

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