LRGB Filters | Astronomy Filters | 1.25″, 36 mm & 2″
Why Choose LRGB Filters?
Designed to overcome light pollution,
the ToupTek Astro LRGB filter set empowers astrophotographers to reveal the universe's
authentic chromatic splendor.
The RGB three-channel filters are essential tools for monochrome astronomy cameras to capture professional-grade images.
ToupTek Astro LRGB filters utilize advanced optical materials and precise coating technology to selectively transmit celestial emissions while blocking urban light pollution. This brings the true colors of the starry sky vividly to life and significantly enhances image contrast.
Even faint celestial targets can reveal rich details. The extremely low halo effect ensures each image has excellent fidelity, elevating your astrophotography to the next level.
The RGB three-channel filters are essential tools for monochrome astronomy cameras to capture professional-grade images.
ToupTek Astro LRGB filters utilize advanced optical materials and precise coating technology to selectively transmit celestial emissions while blocking urban light pollution. This brings the true colors of the starry sky vividly to life and significantly enhances image contrast.
Even faint celestial targets can reveal rich details. The extremely low halo effect ensures each image has excellent fidelity, elevating your astrophotography to the next level.
Technical Parameters
Size: 36mm (unframed) / 1.25”
(31.77mm) / 2”
Glass Thickness: 2mm
Transmission Range:
L (420–690nm); R (595–695nm); G (495–580nm); B (400–510nm)
L (420–690nm); R (595–695nm); G (495–580nm); B (400–510nm)
Transmittance: >95%
Glass Material: Quartz glass
Frame Material: Aluminum Alloy
Metal
Surface Treatment: Double-sided
high-precision optical polishing
Coating Technology: IAD (Ion
Assisted Deposition) coating technology
Coating System Design: AR
anti-reflection coating + quartz glass + precision cutoff coating layer
OD: ≥5.0
Spectrum
Spectral Chart Reading
Tips:
-
The horizontal axis represents the wavelength of light (unit: nm), and
the vertical axis represents light transmittance (unit: %).
Gray line: L channel; Red: R; Green: G; Blue: B - The emission nebula signal bands are mainly concentrated around 656nm (Hα), 500.7nm (OIII), and other bands.
- Light pollution peaks are commonly found near 540nm and 590nm (sodium/mercury lamp bands).
- The transmission regions of the astronomical filters are engineered to avoid these interference bands, ensuring effective signal passage, enhancing contrast, and image purity.
Key Features
ToupTek Astro LRGB Filter Performance
NGC1999
Photographer: voice
Camera: ToupTek ATR2600M
Guide camera: GPM462M
Telescope: Sky-Watcher F3.4
Mount: UMI
Filters: ToupTek Astro 36mm LRGB&SHO
Integration: 12 each of RGB 600s, L 600s × 36, Hα 600s × 48
Total exposure: 20h
Photographer: voice
Camera: ToupTek ATR2600M
Guide camera: GPM462M
Telescope: Sky-Watcher F3.4
Mount: UMI
Filters: ToupTek Astro 36mm LRGB&SHO
Integration: 12 each of RGB 600s, L 600s × 36, Hα 600s × 48
Total exposure: 20h
LBN777
Photographer: voice & LiiiiiCo
Camera: ToupTek ATR2600M
Guide camera: GPM462M
Telescope: Sky-Watcher F3.4
Filters: ToupTek Astro 36mm LRGB&
Mount: UMI
Integration: 20 each of RGB 600s, L 600s × 60, Hα 1200s × 40
Total exposure: 32h
Photographer: voice & LiiiiiCo
Camera: ToupTek ATR2600M
Guide camera: GPM462M
Telescope: Sky-Watcher F3.4
Filters: ToupTek Astro 36mm LRGB&
Mount: UMI
Integration: 20 each of RGB 600s, L 600s × 60, Hα 1200s × 40
Total exposure: 32h
LDN 1532 & IC 2087
Photographer: voice
Camera: ToupTek ATR2600M
Guide camera: GPM462M
Telescope: Askar FRA400
Mount: UMI
Filters: ToupTek Astro 36mm LRGB&SHO
Integration: 15 each of RGB 600s, L 600s × 45, Hα 600s × 66
Total exposure: 26h
Photographer: voice
Camera: ToupTek ATR2600M
Guide camera: GPM462M
Telescope: Askar FRA400
Mount: UMI
Filters: ToupTek Astro 36mm LRGB&SHO
Integration: 15 each of RGB 600s, L 600s × 45, Hα 600s × 66
Total exposure: 26h
M81 & M82
Photographer: yahushua
Telescope: Askar 130HNT28-AL
Camera: ToupTek Astro ATR585M
Mounts: iOptron CEM26
Guide camera: G3M2210M
Filters: ToupTek Astro 1.25” LRGB & H-alpha
Total exposure: 14h
Telescope: Askar 130HNT28-AL
Camera: ToupTek Astro ATR585M
Mounts: iOptron CEM26
Guide camera: G3M2210M
Filters: ToupTek Astro 1.25” LRGB & H-alpha
Total exposure: 14h
M81 L single exposure 300s
M81 R single exposure 300s
M81 G single exposure 300s
M81 B single exposure 300s
Installation
36mm Filters: Align the inward black
ring toward the telescope. Ensure instant orientation.
1.25" & 2" Filters: Screw directly into filter wheels—no front/back orientation needed.
1.25" & 2" Filters: Screw directly into filter wheels—no front/back orientation needed.
Warranty and Service
- Quality Assurance Inspection: Each filter undergoes pre-delivery spectral testing and rigorous screening to ensure consistent optical performance.
- After-sales Policy: A two-year warranty covers manufacturing defects. ToupTek Astro offers professional technical support and usage guidance.
-
For assistance, contact our customer service or technical support through our
support page:
https://touptek-astro.com/supports
Important Notes
- Color Variation: Filter coating colors may appear different under varying lighting conditions and viewing angles—this is normal optical behavior.
- Product Improvements: We continually optimize our products, which may result in minor specification and appearance updates. Specifications are subject to change without notice. Please refer to the physical product for final details.