---
product_id: 47558751
title: "Explore Scientific FirstLight AR90mm White Tube Refractor Telescope with Alt/AZ \"U\" Yoke Mount, 500mm f/5.5 Focal Length"
brand: "explore scientific"
price: "AR$304376"
currency: ARS
in_stock: false
reviews_count: 4
url: https://www.desertcart.com.ar/products/47558751-explore-scientific-firstlight-ar90mm-white-tube-refractor-telescope-with-alt
store_origin: AR
region: Argentina
---

# Alt/AZ 'U' yoke mount for smooth tracking Smart device adapter for astrophotography 90mm aperture for max light Explore Scientific FirstLight AR90mm White Tube Refractor Telescope with Alt/AZ "U" Yoke Mount, 500mm f/5.5 Focal Length

**Brand:** explore scientific
**Price:** AR$304376
**Availability:** ❌ Out of Stock

## Summary

> 🌌 Unlock the universe—because your nights deserve more than just stars.

## Quick Answers

- **What is this?** Explore Scientific FirstLight AR90mm White Tube Refractor Telescope with Alt/AZ "U" Yoke Mount, 500mm f/5.5 Focal Length by explore scientific
- **How much does it cost?** AR$304376 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/47558751-explore-scientific-firstlight-ar90mm-white-tube-refractor-telescope-with-alt)

## Best For

- explore scientific enthusiasts

## Why This Product

- Trusted explore scientific brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready for Sharing:** Includes smartphone adapter to snap and share your cosmic discoveries instantly.
- • **Crystal Clear Views:** Doublet lens design minimizes chromatic aberrations for sharp, vibrant images.
- • **Complete Starter Kit:** Comes with 9mm & 20mm Kellner eyepieces, red dot finder, and full-size tripod with accessory tray.
- • **Effortless Stargazing:** Smooth Altitude/Azimuth 'U' yoke mount ensures precise, easy maneuvering and tracking of objects.
- • **Brighten Your Night Sky:** 90mm aperture captures stunning celestial details with superior light-gathering power.

## Overview

The Explore Scientific FirstLight AR90mm is a beginner-friendly refractor telescope featuring a powerful 90mm aperture and 500mm focal length. Its smooth Alt/AZ 'U' yoke mount and included accessories like dual eyepieces, red dot finder, and smartphone adapter make it perfect for easy, high-quality stargazing and astrophotography on the go.

## Description

Explore Scientific first light 90mm Refractor with AZ mount High quality optics for astronomy, science, and outdoor arenas explore scientific offers superior and high quality astronomical instruments designed and manufactured in our own facilities. With our powerful first light telescope Refractor 90mm, you’ll develop a desire to discover the jewels in our solar system and beyond. Highly stable and built to withstand the elements, Take this Doublet telescope everywhere you go from your backyard to a wide open field. next level astronomy exploration from diving into the details of our solar system to uncovering deep Space treasures, Our versatile and powerful first light astronomy telescope Series features an observation kit to suit all of your celestial needs. Each unique product in this new line of stargazing telescopes comes complete with all of the essentials (telescope, sturdy mount, eyepiece and a Red dot viewfinder). telescope offerings include achromatic refractors ranging in Aperture from 70mm to 152mm, from 100mm to 152mm, and Newtonian reflectors from 114mm to an impressive 203mm. 90mm lens diameter 500mm Focal length 125x magnification and 20mm Keller eyepieces smartphone adapter red dot viewfinder aluminum tripod with “U” yoke mount astronomy software about us with over 30 years in the astronomy optics industry, Explore Scientific is on a mission to Make astronomy accessible for all skill levels and to provide a transformative experience with the tools and guidance needed to explore and navigate the skies. The company continues to focus on building its reputation in the astronomy community by designing high quality stargazer telescopes and premium eyepieces with topnotch clarity, contrast, and functionality.

## Features

- Stargazing companion - discover galaxies, nebulas, planets and more with our telescope refractor and large 90mm Aperture that packs plenty of light-gathering power.
- Convenient mount - with a simple “U” yoke mount and altitude rod, This mounted telescope is smooth and easy to maneuver and Track objects.
- High quality design - this portable telescope features 9mm and 20mm Kellner Eyepieces, a Red dot viewfinder to help with object location, and a full size tripod with accessory tray.
- Smart device Compatible - stable and sturdy, our 90mm telescope includes an adapter to aid observers when using Smart devices to capture and share images.
- Powerful visuals - the Doublet design of our traveling telescope uses a pair of glass lenses separated by a cushion of air to minimize chromatic aberrations.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 35 x 12 x 8 inches |
| Package Weight | 5.51 Kilograms |
| Item Dimensions  LxWxH | 35.04 x 12.2 x 7.48 inches |
| Item Weight | 5 Pounds |
| Brand Name | Explore Scientific |
| Model Name | FirstLight |
| Color | White |
| Material | Metal |
| Suggested Users | unisex-adult |
| Number of Items | 1 |
| Manufacturer | Explore Scientific (Sporting Goods) |
| Part Number | FL-AR90500AZ |
| Included Components | (1) Red-Dot Finder, (1) Tripod, (1) Smartphone Camera Adapter, (1) Telescope, (1) Focuser, (1) Eyepiece, (1) Mount |
| Size | 90mm |
| Skill Level | Beginner |

## Product Details

- **Brand:** Explore Scientific
- **Model Name:** FirstLight
- **Eye Piece Lens Description:** Kellner
- **Objective Lens Diameter:** 90 Millimeters
- **Telescope Mount Description:** Altazimuth Mount
- **Focus Type:** Manual Focus
- **Power Source:** Adapter
- **Finderscope:** Reflex
- **Item Weight:** 5 Pounds
- **Compatible Devices:** Smartphone

## Images

![Explore Scientific FirstLight AR90mm White Tube Refractor Telescope with Alt/AZ "U" Yoke Mount, 500mm f/5.5 Focal Length - Image 1](https://m.media-amazon.com/images/I/61OTEcpzOzL.jpg)
![Explore Scientific FirstLight AR90mm White Tube Refractor Telescope with Alt/AZ "U" Yoke Mount, 500mm f/5.5 Focal Length - Image 2](https://m.media-amazon.com/images/I/51TaIHTHlHL.jpg)

## Customer Reviews

### ⭐⭐⭐ Disappointed
*by L***L on August 12, 2020*

Can’t get an image through the lens. It’s far too short does not extend up high enough.

### ⭐⭐⭐⭐ Works for me
*by J***E on June 14, 2020*

Great beginner's telescope, flimsy tripod though.

### ⭐⭐⭐ Mostly disappointed
*by J***O on August 10, 2022*

It seems like a great price for a 90mm coated glass doublet, but it's very frustrating to use.PROS:Mine has a nice objective lens. Views of the moon were surprisingly clear and sharp, if using good eyepieces. I mostly used wide and sharp Explore Scientific 15mm 72 degree and a SvBony zoom (surprisingly great performance for the money).CONS:It has the worst focuser I've ever used (and I've used many low end $40-100 telescopes). It wobbled like a broken wagon wheel when I received it. Tightening the focuser screws kept the focuser knobs stationary, but there's a lot of slop and backlash in the rack, even for a $50 scope, which it isn't. This can be improved by adding a helical fine adjustment focuser (for an additional $45). But there's no way to lock the focus without significant mods.The fine altitude adjustment rod connector has a TON of slop in it, which makes altitude adjustments annoying. You can work around it, but you're constantly reminded that you spent $200 for a telescope that feels like a $50-100 telescope. I tried adding tape to increase the diameter of the screw attaching it to the OTA but didn't see noticeable improvement.The tripod legs are a mix of cheap plastic and extremely thin aluminum extrusion. I planned to fill them with epoxy/rebar to stiffen them up, but haven't done that yet because they're designed in a way that requires drilling out rivets to access the inside. The tripod is also extremely short for a refractor where you have to get underneath it to sight through the finder, which should have been mounted higher. I plan to move the finder to the dew shield (requires opening the scope) and make some longer wood legs for it.The geometry of the mount puts the eyepiece out on a long lever arm from the yoke, so all the flex and slop of the mount+tripod gets magnified into huge wobbles in the view every time you touch the focuser.The end of the altitude adjustment locking bolt is bare metal and doesn't have a piece of plastic to protect the surface of the adjustment rod. Adding a piece of rubber from a garden hose gasket under the locking knob protects the rod from being marred by the bare bolt head. It also improves the feel of the altitude adjustment motion.I would return it except I don't want to pay ES's restocking fee and return shipping, which would be the cost of another cheap scope. Maybe one day I'll try to 3d print a focuser locking ring for it and/or a dovetail for a different mount.Overall, I wouldn't recommend this telescope. I consider any of the Zhumell table top dobs a better option, or even one of the other (appropriately priced) toy scopes provided that they take standard 1.25" eyepieces.

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-01-29*