The Explore Scientific FirstLight AR90mm f/5.5 Refractor is the perfect entry point for stargazers who want simplicity, versatility, and quality optics. With its 90mm aperture and fast f/5.5 focal ratio, this telescope excels at delivering bright, wide-field views—ideal for the Moon, planets, and bright deep sky objects like star clusters and nebulae.
The air-spaced doublet lens helps reduce chromatic aberration, producing sharper, clearer images whether you're viewing celestial or terrestrial targets. The alt-azimuth U-yoke mount features an altitude rod for smooth, controlled movements, allowing easy manual tracking of your subject.
This complete kit includes K9 and K20 Kellner eyepieces, a red dot finder, erect image diagonal for correctly oriented views, a smartphone adapter, and a full-size aluminum tripod with accessory tray—everything you need to start exploring right out of the box.
CA Residents: Prop 65 WARNING(S)
🌟 Features & Benefits
- 90mm aperture gathers ample light for crisp views of lunar features, planets, and deep-sky objects
- 500mm focal length / f/5.5 focal ratio offers wide fields and quick setup time
- Air-spaced doublet lens design reduces chromatic aberration for improved clarity
- Alt-Azimuth “U” yoke mount with altitude rod allows intuitive, smooth manual tracking
- Full-size aluminum tripod with accessory tray provides stability and convenient storage
- K9 and K20 Kellner eyepieces offer low and medium magnification options
- Red dot finder makes locating objects quick and simple
- 1.25" erect image diagonal delivers correct orientation for daytime terrestrial viewing
- Smartphone adapter allows easy astrophotography and image sharing
🌌 Who It’s For
- Beginners looking for a low-maintenance, intuitive telescope
- Users interested in both astronomy and terrestrial viewing
- Parents, students, or hobbyists wanting a versatile grab-and-go setup
- Anyone who wants to photograph the Moon or planets using a smartphone
🔭 What You’ll Be Able to See
- Close-up views of the Moon’s craters and maria
- Stunning planetary features like Saturn’s rings and Jupiter’s cloud belts
- Wide-field views of Orion Nebula, Pleiades, and Milky Way star fields
- Terrestrial subjects like wildlife or distant landscapes (with correct orientation)
🎒 What’s Included
- FirstLight AR90mm f/5.5 Refractor Optical Tube
- Alt-Azimuth U-Yoke Mount with Altitude Rod
- Full-Size Aluminum Tripod with Accessory Tray
- K9 and K20 1.25" Kellner Eyepieces
- 1.25" Erect Image Diagonal
- Red Dot Finder (HD132)
- Smartphone Camera Adapter
- Downloadable Astronomy Software
Specs
| Item Number | FL-AR90500AZ |
|---|---|
| Optical Design | Achromatic Refractor |
| Optical Diameter | 90 mm |
| Focal Length | 500 mm |
| Focal Ratio | f/5.5 |
| Lens Coatings | Fully Multi-Coated |
| Magnification | 125x |
| Eyepieces Included | 1.25" K9 and K20 |
| Adapter | 1.25" Draw Tube Focuser; 1.25" Erect Imaging Diagonal |
| Mount Type | Alt/AZ “U” Yoke Mount |
| Tripod | Full-size aluminum with accessory tray |
| Included Accessories | Smartphone Adapter, Red Dot Viewfinder, Downloadable Software |
Warranty Information:
This product includes a Limited One-Year USA Warranty, which converts to the Explore STAR Transferable Extended Life of the Product Warranty when registered within 60 days of purchase.
To activate your warranty, register your product at:
www.explorescientific.com/pages/product-registration