STC 2" Mounted LRGB Astro Urban Sky Filter

Dear overseas customer,
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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 (7x2")

ZWO EFW is a 7-position 2" (M48) 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 650g. It can be operated by just one USB cable which supplies power and transfers signal. The maximum power supply is 120mAh @ 5V.

ASI6200MM Pro Full-Framed Monochrome Cooled Camera

ASI6200MM Pro is a powerful deep sky imaging camera with a full-frame monochrome sensor.
Specification:

ASI294MM Pro Monochrome Cooled Camera

ASI294MM Pro is a powerful deep sky imaging camera with a 4/3" monochrome sensor.
Specification:

ZWO Filter Drawer (M54／M42)

The M54 Filter Drawer with 20mm ring design is independently developed by ZWO and specifically made to match with the full-frame cooled camera ZWO ASI6200 and ASI2400. The M42 Filter Drawer can be fitted on cameras with M42 adaptor, such as ASI294 Pro, ASI2600 Pro, ASI183 Pro, etc. The strong magnets on the sides create a stronger adsorption hold, easier installation, and easier drawer removal. There is a lock-screw on the top of the filter drawer to adjusting the tension to eliminate the gap for double insurance during use.

M54 Installation:

1. M48*0.75 female(internal) thread for 2"(M48) filter
2. M54*0.75 female(internal) thread for telescope side
3. M54*0.75 male(external) thread for ASI6200 or ASI2400 camera

M42 Installation:

1. M48*0.75 female(internal) thread for 2"(M48) filter
2. M48*0.75 female(internal) thread for telescope side
3. M42*0.75 male(external) thread for ASI294 camera

Mechanical drawing

Product Accessories