Acuter LUMA X Limited Edition Solar Prominence & Sunspot OTA

About this product

Experience the dynamic activity of our home star in breathtaking detail with the Acuter LUMA X Limited Edition solar telescope. Built around premium extra-low dispersion (ED) glass and fully compliant with ISO 12312-2:2015 safety standards, this compact optical tube reveals arching prominences, flares, and surface sunspots in real time. It offers an adaptable, safe observation and imaging platform for both casual observers and dedicated solar astrophotographers.

Two Viewing Modes in One Instrument

Avoid the hassle of swapping scopes or handling fragile external filters while observing outdoors. The LUMA X integrates a switchable 90-degree diagonal that toggles seamlessly between Hydrogen-Alpha and white-light views on the fly. Study fine chromospheric details such as flares and prominences, then immediately change modes to inspect photospheric sunspot groups and granulation.

High-Definition ED Optical Performance

Constructed with high-grade extra-low dispersion (ED) optical glass, the objective refractor minimises chromatic aberrations for sharp, high-contrast imagery across the entire solar disc. Coupled with a sub-0.6 Ångström front etalon, a responsive pressure-tuning mechanism, and an 8 mm blocking filter, the telescope resolves intricate spicules and filaments with exceptional clarity.

Compact Chassis and Versatile Mounting

The rigid square-profile chassis maintains optical alignment and resists flexure while keeping total tube weight down to an easily manageable 1.9 kg. A smooth Crayford focuser facilitates precise focus adjustments, while the built-in 45 mm dovetail bar features standard 1/4-inch tripod mounting threads for simple attachment to astronomical tracking mounts or photographic tripods.

Key Features

• Sub-0.6 Å Bandwidth – Resolves delicate solar chromosphere features, eruptive prominences, and active flaring zones with accurate pressure tuning.
• Dual-Mode Diagonal – Quickly switches between Hydrogen-Alpha wavelengths and white-light sunspot tracking using internal green and neutral density filters.
• ED Glass Refractor – Suppresses false colour aberrations while maximising contrast and definition across the field of view.
• 5–16 mm Zoom Eyepiece – Provides smooth, continuous visual magnification spanning from 15.6× to 50× without requiring eyepiece swaps.
• Precision Crayford Focuser – Delivers responsive, backlash-free focusing required for delicate visual viewing and astrophotography.
• 8 mm Blocking Filter – Ensures strict visual protection in full compliance with ISO 12312-2:2015 solar observation standards.
• Versatile 45 mm Dovetail – Connects quickly to standard telescope saddles and includes a 1/4-inch thread for direct tripod mounting.

Specifications

What's in the Box

• Acuter LUMA X 40ED Optical Tube Assembly with Integrated H-Alpha Etalon
• Dual-Purpose 90° Switchable Angled Diagonal (H-Alpha / White Light with 8 mm Blocking Filter)
• Safe Solar Finder
• Glare Light Shield
• 5 – 16 mm Zoom Eyepiece (1.25″)
• Universal Smartphone Photography Adapter
• 45 mm Dovetail Mounting Bar (with 1/4-inch Thread)
• Rigid Carrying Case