STC 1.25" Mounted LRGB Astro Urban Sky Filter

Dear overseas customer,
Please contact us on our fan page Airy, or by email if you'd like to place an order. We will create a product page including the shipping fee specifically for you.

STC LRGB Astro Urban Sky Filter is specially designed for urban areas with heavy light pollution. R (red) filter covers H-alpha (656.3nm), NII (654.8nm, 658.3nm), and SII (672.4nm) emission lines. G (green) & B (blue) filters both cover OIII lines 495.9nm and 500.7nm. The L (luminance) filter is responsible for collecting the brightness and resolution of celestial objects and allows the visible spectrum from 380nm to 680nm to pass. The anti-light pollution design allows G & B filters to block mercury-vapor lamps, neon lights, and a huge number of sodium-vapor lights.

The L filter can act in concert with or be replaced by our Astro Multispectra Filter (MS) according to the shooting environment. MS filter not only allows wavelengths from 380nm to 680nm to pass, but also blocks out the light pollution produced by mercury-vapor and sodium-vapot lights. It will significantly eliminate the affect of light pollution in the luminance band.

Features

• The first to give RGB filters anti-light pollution ability.
• L filter & MS filter can be used alternately to eliminate the effects of light pollution or shooting at low altitudes.
• 0.5mm extremely thin glass shortens the passage of light and reduces the diffraction range to avoid focus shift, glow, and the need to refocus when switching filters.
• The special anti-reflection coating prevents the happening of halo, ghost, and multi-ghost images.
• Strict parfocal coating engineering and optical surface flatness manufacturing allows 8K high resolution and telescopes with 1200mm focal length
• Prevents fogging by absorbing and quickly dissipating heat.
• Double-sided antistatic and anti-smudge coating.
• Covered by the world’s first global warranty and repair service for filters.

Sample Image A.

Sample Image B.

Target: M31 (NGC 224) Andromeda Galaxy
Copyright: 楊正雄
Location: Starry House, Nantou, Taiwan (Bortle 4)
Single Exposure Time: 300.00s
Post-processing: LRGB 1 frame each, without bias, dark, and flat

Sample Image C. MS + RGB

Optional Accessories

ZWO EFW Electronic Filter Wheel (8x31mm)

ZWO EFW is an 8-position 31mm electronic filter wheel CNC-milled from aircraft-graded aluminum block with a high-quality stepper motor installed. It can be rotated in both clockwise and counter clockwise directions for filter selection. The total thickness and weight are only 20mm and 400g. It can be operated by just one USB cable which supplies power and transfers signal. The maximum power supply is 120mAh @ 5V.