The Celestron StarSense Explorer LT 127AZ revolutionises the manual telescope experience with built-in smartphone navigation. Using Celestron’s patented StarSense Sky Recognition Technology, it analyses star patterns through your phone to pinpoint exactly where your telescope is aimed — guiding you effortlessly to planets, galaxies, and nebulae in real time.

Simply dock your smartphone, launch the StarSense Explorer app, and follow the on-screen arrows as they lead you to celestial targets. Within minutes, you’ll be confidently exploring the sky — no star charts or complex alignments needed.

The 127mm Newtonian reflector delivers bright, detailed views of the Moon, Jupiter’s moons, Saturn’s rings, and deep-sky favourites like the Orion Nebula and Pleiades cluster. Its sturdy altazimuth mount with slow-motion control makes fine adjustments smooth and easy, while the lightweight 11.4 lb setup is perfect for travel and quick backyard sessions.

Key Features

127 mm Newtonian reflector with bright, sharp optics
StarSense smartphone dock and app for real-time sky guidance
Uses patented "Lost in Space Algorithm" (LISA) technology for precise positioning
Compatible with most modern iOS and Android smartphones
Simple altazimuth mount with slow-motion control for smooth tracking
Includes 25 mm and 10 mm eyepieces, 2× Barlow lens, and red-dot finder
Portable, lightweight design - ideal for city use or dark-sky trips

Specifications

Optical Tube Info

Optical Design: Newtonian Reflector
Aperture: 127mm
Focal Length: 1000mm
Focal Ratio: f/7.87
Focal Length of Eyepiece 1: 25mm
Magnification of Eyepiece 1: 40x
Focal Length of Eyepiece 2: 10mm
Magnification of Eyepiece 2: 100x
Barlow Lens: 2x
Finderscope: StarPointer™ red dot finderscope
Optical Tube: Steel
Highest Useful Magnification: 300x
Lowest Useful Magnification: 18x
Limiting Stellar Magnitude: 13
Resolution (Rayleigh): 1.1 arc seconds
Resolution (Dawes): .91 arc seconds
Light Gathering Power (Compared to human eye): 329x
Secondary Mirror Obstruction: 41mm
Secondary Mirror Obstruction by Diameter: 32%
Secondary Mirror Obstruction by Area: 10%
Optical Coatings: Glass mirrors coated with aluminum and SiO2
Optical Tube Length: 457.2mm
Optical Tube Diameter: 165.1mm
Optical Tube Weight: 3.44 kg
Dovetail: None

Product Model:	SR41W-BP5
Product Name:	Maxell SR41W Button Silver Oxide Battery 39mAh 5 Pack
Manufactured By:	Maxell
Type:	Button / Coin Cell

Maxell Silver Oxide Sr41 W (392) Battery Button Cell 5 Pack