Skip to content

Explore Scientific FirstLight 90mm Doublet Refractor Telescope with Az Mount

Original price $0.00 - Original price $0.00
Original price $0.00
$129.99 - $129.99
Current price $129.99
In stock

Ships To: United States & Canada 🇺🇸 🇨🇦

✓ Free U.S. Shipping (on most orders over $150 USD)

✓ Price Match Available

✓ Authorized Dealer

✓ Bulk Order Discounts Available

✓ Questions? Call Us 1-800-860-3429

Ships In: 1-3 Business Days

Estimated Delivery Time: 3-7 Business Days

Shipping & Returns

We offer free U.S. shipping to the lower 48 States - on most orders over $150 USD. Some limitations apply.

Shipping fees will apply on most orders shipping across Canada, with some exceptions.

We offer a 30 Day Return Policy on most of the products that we carry.

For full details on our Shipping & Returns Policy, please click here.


The vast majority of products that we sell, with a few exceptions, are covered under Warranty.

To view the Warranty details for each brand that we sell, including products that do not qualify for Warranty, please visit here.

Explore Scientific FirstLight 90mm f/5.5 Doublet Refractor Telescope with AZ Mount - FL-AR90500AZ

Discover the Explore Scientific FirstLight 90mm f/5.5 Doublet Refractor Telescope with Az Mount—an invitation to embark on an astronomical journey.

Whether you aim to explore the intricacies of our solar system or uncover the mysteries of deep sky treasures, the versatile FirstLight telescope series offers meticulously curated observing packages tailored to your unique needs.

Each package is thoughtfully designed, encompassing all the essentials: a precision-engineered telescope, a robust mount, quality eyepieces, and a red dot viewfinder for accurate alignment.

The telescope lineup spans achromatic refractors with apertures ranging from 70mm to 152mm, Maksutov-Cassegrains from 100mm to 152mm, and Newtonian reflectors stretching up to an impressive 203mm aperture.

Mount options are diverse, accommodating beginners and experienced astronomers alike.

Choose from straightforward fork-mounted alt-azimuth setups for ease of use or opt for the comprehensive GOTO tracking systems for automated celestial navigation.

As an added delight, each package includes a smartphone adapter, enabling you to effortlessly capture and share the celestial wonders you encounter through your eyepiece.

The FirstLight AR90mm Refractor telescope boasts a 500mm focal length at f/5.5, featuring fully multi-coated optics for clarity and brilliance.

It rests on an Az "U" Yoke mount for intuitive control and comes with an aluminum tripod for stability.

A 1.25" draw tube focuser ensures precision focusing, while a 1.25" Erect Imaging Diagonal offers comfortable viewing angles.

The package includes K9 and K20 eyepieces for versatile magnification, an HD119 Red-dot Finder for pinpoint alignment, and a smartphone camera adapter for documenting and sharing your celestial discoveries.

With FirstLight, your desire to discover is all that's needed to unlock the wonders of the universe.



  • 90mm Objective Lens: This telescope boasts a 90mm (3.54 inches) objective lens, providing a generous aperture for astronomical observations. The larger lens diameter allows for excellent light-gathering capabilities, revealing celestial objects with clarity and detail.
  • 125x Highest Useful Magnification: With a maximum useful magnification of 125x, this telescope offers the potential for high-powered observations. It enables detailed views of the Moon's surface, planetary features, and various deep-sky objects, making it suitable for both lunar and deep-space exploration.
  • 500mm Focal Length: The telescope features a 500mm focal length, which, combined with its f/5.5 focal ratio, delivers wide-field views and makes it well-suited for a variety of celestial observations.
  • Fully Multi-Coated Lens: The optical elements of this refractor telescope feature fully multi-coated lenses. These advanced coatings enhance light transmission, reduce reflections, and improve image contrast and brightness. As a result, you can expect sharp and vibrant views of celestial objects.
  • Doublet Refractor Design: The telescope utilizes a doublet refractor optical design, consisting of two lens elements. This design minimizes chromatic aberration, providing true-color and high-contrast views, ensuring that celestial objects appear as they should.
  • AZ Mount: The telescope comes with an AZ (Altitude-Azimuth) mount, which offers simple and intuitive movement. This mount makes it easy to point the telescope at specific celestial objects and track them as they move across the night sky.
  • Full-Size Tripod: The package includes a full-size tripod with an accessory tray. This tripod provides stability and a secure platform for your observing sessions, ensuring steady views of the night sky.
  • 1.25" Rack-and-Pinion Focuser: The telescope features a 1.25-inch rack-and-pinion focuser, allowing for smooth and precise focusing. This focuser accommodates various eyepieces and accessories, providing flexibility in your observations.
  • Red Dot Finder: Included in the package is a red dot finder, which aids in accurately aligning and targeting celestial objects. It simplifies the process of locating and centering objects in the night sky.
  • Smartphone Adapter: As a bonus, the package includes a smartphone camera adapter. This adapter allows you to easily attach your smartphone to the telescope, enabling you to capture and share your celestial observations with friends and family.


Recommended accessories:

For continuous stargazing without disruption due to dew, maintaining optical clarity, and safeguarding your valuable equipment, contemplate the AstroZap 4-inch Dew Heater Strap, Specifically designed for Doublet Refractor Telescopes, it's your ideal solution.

AstroZap - Dew Heaters and Controllers

AstroZap's dependable anti-dew solutions are customized to elevate your telescope's capabilities and durability, rendering them the perfect companion for your celestial explorations.


What's Included:

✓ Explore Scientific 90mm Doublet Refractor Telescope

✓ Az Mount

✓ Plossl 25mm eyepiece

✓ Red-dot finder

✓ Smartphone camera adapter

✓ Limited 1 year warranty



      Item Number  FL-AR90500AZ
      Comes With  Smartphone Adapter, Red Dot Viewfinder, Downloadable Software
      Lens Coatings  Fully Multi-Coated
      Magnification  125x
      Focal Length  500mm
      Focal Ratio  f/5.5
      Adapter  1.25" draw tube focuser; 1.25" Erect Imaging Diagonal
      Optical Diameter  90mm
      Eyepiece  1.25" K9 and K20 eyepieces
      Mount Type  Alt/AZ “U” Yoke mount; Aluminum tripod

      Explore Scientific FirstLight 90mm Doublet Refractor Telescope with Az Mount Product Manual:

      Customer Reviews

      Be the first to write a review