Feature

●Multi-layer optical coating，eliminates urban mercury and sodium lamps artificial light pollution, clearer celestial objects, higher the nebula contrast and astronomical photography image quality.
●1.25 inch telescope filter, standard thread M28.5x0.6mm, compatible with astronomical eyepieces and astrophotography electronic eyepieces, rotary docking
●Aluminum alloy frame, high-transparency optical glass, lightweight and durable, exquisite and environmentally friendly packaging materials
●Stacks frame structure design, different filters can be connected in series, different functions of filters can be superimposed
●Advanced manufacturing technology, uniform layer, high light transmittance, ultrasonic cleaning and dust removal, waterproof coating
●Choose wisely, and the universe will be your endless canvas


Description

Telescope UHC Filter Eliminates Light Pollution and Improves Deep Space Contrast
Standard thread interface, suitable for 1.25 inch telescope eyepieces and astronomical cameras.
The broadband filter in the astronomy filter series selectively blocks certain harmful light wavelengths, especially artificial light (including mercury light and sodium light) and natural sky glow, allowing the useful light emitted by nebulae to efficiently pass through.
Use in places with severe light pollution, such as in cities.
Filters make nebulae easier to see because after filtering out harmful light, increase contrast and make nebulae easier to see.

Filter Production Process
Precision polishing, with good parallelism and surface accuracy, double-sided precision grinding and polishing, which can effectively eliminate halo.
Monolithic filter maximizes transmittance and cut-off depth.
The film layer has good density and adopts ion plating technology to effectively reduce the drift of the filter wavelength caused by temperature increase.
The metal outer frame is made of high-quality aluminum alloy material, and the inside of the frame is black oxidized and matted to eliminate reflections.
Filters can be connected in series with other functional filters to achieve multi-filter superposition.

UHC Filter Parameters
Model:Dawn01
Glass material: Highly transparent optical glass, multi-layer coating，95%+Transparency
Interface:M28.5X0.6mm
Size：31.75LX31.75WX8H mm
Weight:5g
Surface finish：H
Grade:A

Precautions for Use
Filter increases nebula contrast, not brightness
Filters dont stop all light pollution
Keep lenses clean and prevent wear and tear