Buy one, get one 25% off - Alpen Optics

Explore Scientific  |  SKU: FPL53-165CF-01

Explore Scientific ED165 FPL53 165mm f/7 Triplet Carbon Fiber Refractor


Estimated delivery in 3-5 business days via UPS or FedEx

Ships from US warehouse in 1-2 business days

Shipping & Returns

We offer free US standard shipping on orders over $99 and 30-day returns on most items. Some limitations apply.

Shipping Policy

30-Day Return Policy

Explore Scientific ED165 FPL53 165mm f/7 Air-Spaced Triplet ED APO Carbon Fiber Refractor Telescope



  • 165mm / 6.5" Aperture Refractor OTA
  • 1155mm Focal Length, f/7 Focal Ratio
  • Apochromatic Triplet Lens Configuration
  • Ohara FPL-53 extra-low dispersion (ED) Glass
  • Proprietary EMD Enhanced Multi-Coatings
  • Two-Speed 3" Hexagonal Focuser
  • Vixen-Style Dovetail Plate
  • Lightweight Carbon Fiber Optical Tube
  • 99% Reflective 2" Diagonal
  • OTA Only: Mount and Tripod Required


Explore Scientific's largest refractor telescope incorporates our true three-element apochromat design the ED165-FPL53 with an aperture of 165mm (6.5-inch) utilizes one of the highest performance extra-low dispersion materials obtainable: OHARA FPL-53 ED Glass. Reveal celestial wonders like the desolate beauty of the lunar terrain, the serene structure of Saturn’s rings or some of the most challenging deep sky objects with Explore Scientific’s ED165-FPL53 Air-Spaced Triplet Apochromatic Refractor.

Combining FPL-53 with optical glass of high refractive index allows us to achieve unprecedented advanced chromatic aberration correction. OHARA FPL-53 is considered one of the best glass types ever produced. Having a true diffraction-limited optical design, this large high performance refractor  is a perfect grab-and-go instrument for exploring the skies.

Featuring an air-spaced triplet optical design that virtually eliminates chromatic aberrations, this telescope generates brilliant high-contrast images by combining genuine OHARA FPL-53 extra-low dispersion (ED) glass and proprietary EMD enhanced multi-layer coatings on all optical surfaces.

In addition, this amazing scope also includes a 3" Hexagonal focuser with very rigid design and strong support. Up to 10 lbs of gear can be loaded onto this focuser.

ED165mm f/7 Air Spaced Triplet with Ohara FPL-53 optics and Integrated Dew Shield; 1155mm focal length; 3" HEX Focuser; Cradle Ring with Handle and Vixen Style Dovetail Plate; Explore Finder Scope Base installed on scope; 99% Reflective 2" Diagonal; and a hard TSA approved carrying case.  (Finder Scope NOT Included)


Recommended Accessories

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Meta Pay
  • Google Pay
  • Mastercard
  • Shop Pay
  • Visa

Your payment information is processed securely encrypted during transmission. We do not store credit card details nor have access to your credit card information.

Customer Reviews

Be the first to write a review

Questions & Answers

Have a Question?

Be the first to ask a question about this.

Ask a Question
Explore Scientific ED165 FPL53 165mm f/7 Triplet Carbon Fiber Refractor | FPL53-165CF-01 | 812257017652

Explore Scientific ED165 FPL53 165mm f/7 Triplet Carbon Fiber Refractor





165 mm | 6.5"

Focal Length

1155 mm

Focal Ratio


Field of View



.9 arcsec

13 limiting magnitude

Ohara FPL-53 ED Glass

EMD Enhanced Multi-Coatings

Barrel Size



52" (1320mm) Tube Length w/ Dew Shield

41" (1041mm) Tube Length w/out Dew Shield

165mm Diameter


27.6 lb | 12.51 kg
View product