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Explore Scientific AR102 102 mm f/6.5 Air-Spaced Doublet


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Explore Scientific AR102 102 mm f/6.5 Air-Spaced Doublet

102mm f/6,5mm Achromat
2" 99% diagonal mirror with reducer 2"/1,25"
8x50 Finderscope
Removable Dewshield
Rings with universal mounting dovetail
Handle with camera mounting feature
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Explore Scientific AR102 102 mm f/6.5 Air-Spaced Doublet

The Explore Scientific AR102 102 mm f/6.5 Air-Spaced Doublet is an excellent choice for those looking for a rich field refractor, with decently engineered focuser and lens cell.  Explore Scientific have rightly gained a good reputation for delivering high quality instruments at reasonable prices.  While this telescope is an Achromat and doesn't have quite the colour correction of Explore Scientific's Triplet series of Apochromatic ED refractors, the general optical quality is first rate as an Achromatic design.

A four inch refractor will always deliver consistently decent resolution and good contrast, even under average seeing conditions and the Explore Scientific AR102 is a great example of such a design.  This telescope's classic air-spaced, crown-and-flint, doublet achromatic f/6.5 lens has a superior-class optical figure which will deliver amazing views at the eyepiece.  This telescope is supplied with a 2" dual-speed Crayford-style focuser, a one-piece 2" star diagonal with 99% dielectric coatings, an 8x50mm non-illuminated straight-through finderscope with quick release bracket - and a cradle ring assembly with Vixen-style dovetail mount, compatible with a vast array of commercially available mounts.

Standard Hardware:

• Removable Dew Shield
• Front and Rear Dust Covers
• Cradle Rings with Handle and Univsersal Saddle Plate
• Two-Speed Focuser 2.0" I.D.
• 8x50 Finder Scope with Six Point Adjustable Bracket
• 2.0" 99% Reflective Mirror Diagonal with 1.25 " Adapter


• Optical Design: Air-Spaced Doublet Achromatic Refractor
• Clear Aperture: 102mm
• Focal Length: 663mm
• Focal Ratio: f/6.5
• Resolving Power: 1.14 arc seconds
• Coatings: Fully Multi-Coated
• Limiting Stellar Magnitude: 12.5
• Focuser: Two-Speed Crayford-Style, w/ Adjustable Tension and Lock
• Finder Scope: 8x50 Straight; Adjustable Objective Focus; Dual-Ring, Six-Point, Bracket w/Quick Release Shoe
• Cradle/Saddle Plate: Dual Ring Style - Fits Explore Scientific Mounts; and Other Third Party Mounts that Accept Vixen-Type Rail
• Tube Diameter: 3.96" - 100.7mm
• Dew Shield Diameter: 7.5" - 100.7mm
• Tube Length (eyepiece holder to end of dew shield: 25.5" - 648mm
• Tube Construction: Aluminum; Stainless Steel
• Optical Tube Assembly Weight (with all standard accessories): 11.3 lbs - 4.67 kg
• Shipping Box Dimensions: 40 x 10 x 10 inches; 101.6 x 25.4 x 25.4 cm
• Shipping Weight: 17 lbs; 7.7 kg                                                                                                                       

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