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

Explore Scientific FirstLight 90mm Doublet Refractor Telescope with AZ Mount

Sale price$ 59.99
Sold out

Start your journey through the cosmos with the Explore Scientific FirstLight 90mm Doublet Refractor Telescope. Designed for both beginner and casual astronomers, this telescope delivers impressive views of the Moon, planets, star clusters, nebulae, and even bright galaxies—all through a crisp, high-quality 90mm air-spaced doublet lens. With a fast 500mm focal length (f/5.5), the FirstLight 90mm provides wide-field views ideal for scanning the night sky and capturing rich detail. The air-spaced doublet optical design minimizes chromatic aberration, while fully multi-coated optics ensure bright, contrast-rich images. Its simple alt-azimuth yoke mount with altitude rod makes manual tracking smooth and intuitive, and the full-size aluminum tripod offers stability and a convenient accessory tray. The included 9mm and 20mm Kellner eyepieces, red dot finder, erect image diagonal, and smartphone adapter make this kit a complete, ready-to-use system for day or night observing.

SKU: FL-AR90500AZ

Standout Features

Versatile 90mm Doublet Optics

Crisp, wide-field views with reduced chromatic aberration.

Smooth Manual Tracking

Alt-azimuth yoke mount with altitude rod for intuitive movement.

Complete Accessory Kit

Includes two eyepieces, red dot finder, and smartphone adapter.

Day or Night Use

Erect image diagonal makes it ideal for both celestial and terrestrial viewing.

Product Specifications

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

You may also like

This 90mm refractor delivers sharp images and strong light gathering, with customers praising it as exceeding expectations for beginners. Great for moon and planet viewing at an affordable price point. However, some noted the tripod wobbles, finder alignment issues make locating objects difficult, and focuser quality concerns. Best suited as a starter scope or quick grab-and-go option.

  • Far exceeded my expectation of a beginner telescope.
  • Sharp images, and I didn't notice much false color at all observing the first quarter Moon.
  • Good buy at discounted price. Great to have around for quick viewing and birds
Planets (positive)Price (positive)Moon (positive)Telescope (positive)Eyepieces (neutral)
  • 5 stars: 4 (67%)
  • 4 stars: 1 (17%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 1 (17%)
S
Sarah Hochstetler

Far exceeded my expectation of a beginner telescope.

A
Anonymous (United States)

Good buy at discounted price. Great to have around for quick viewing and birds

L
Lawrence Campisi (United States)

Excellent scope. The 90mm pulls on a lot of photons, the tripod is a bit wobbly, but it does the job at this price point.
The camera adapter is difficult to use. But overall the planets look great and I use better eyepieces. The ones that come with it are ok.

A
Anonymous

It was broken, kinda disappointed! Focuser not really substantial!

A
Anonymous (United States)

This is a lot of telescope for only about $60 (sale price). Great for viewing the moon while in a city. For planets, one will need to be in a very dark place at least couple of hours away from a city to get optimal light capture. The finder does not work well because its mount is not aligned with the telescope, so the red dot is useless. You can move the position of the whole finder and its mount for broad adjustments. This makes finding planets very difficult. For little kids this is a great starter telescope. If you want a little more precision I recommend purchasing one of their $200 telescopes.

E
Edward Conley (United States)

What a great little grab and go refractor. Sharp images, and I didn't notice much false color at all observing the first quarter Moon. Loving it so far. 😀

Free United States Shipping

Orders $70+ shipped within the continental United States qualify for free standard shipping. Learn more.

Explore Scientific Warranty

Register your product within 60 days to activate your warranty coverage. Learn more.

30 Day Returns

Returns are accepted within 30 days if the item is in original condition. Learn more.

Dedicated Customer Support

Our customer service team is here to help with product support and warranty service. Learn more.