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Baader LRGB Filter Set - CMOS-Optimized
Baader LRGB Filter Set - CMOS-Optimized
Baader LRGB Filter Set - CMOS-Optimized
Baader LRGB Filter Set - CMOS-Optimized
Baader LRGB Filter Set - CMOS-Optimized
Baader LRGB Filter Set - CMOS-Optimized
Baader LRGB Filter Set - CMOS-Optimized

Baader LRGB Filter Set - CMOS-Optimized

by Baader Planetarium
SKU BAA-2961610
CA$436.00 - CA$1,216.00
CA$436.00
CA$436.00 - CA$1,216.00
CA$436.00
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  • Designed specifically to eliminate reflections and halos with modern CMOS sensors
  • Balanced RGB transmission enables simplified 1:1:1 exposure ratios
  • Reflex-Blocker™ hard coatings and sealed coating edges prevent premature aging
  • Sharp bandpass cutoffs maximize signal while rejecting IR and UV interference
  • Available in 7 formats from 1.25" mounted to 65x65mm square
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  • Description
  • FAQ
  • Specifications
  • In the Box
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  • Warranty

  • Baader LRGB Filter Set - CMOS-Optimized

    The Baader LRGB Filter Set is engineered to meet the demands of modern CMOS astrophotography, offered in 7 formats including 1.25" and 2" mounted versions. This set addresses the primary challenge of internal reflections in sensitive CMOS sensors and is available in unmounted round formats of 31mm, 36mm, and 50.4mm, plus 50x50mm and 65x65mm square options for large-format imagers.

    CMOS-Optimized Coatings: Eliminating Halos Around Bright Stars

    Modern CMOS sensors are highly reflective, often causing prominent halos and reflections around bright stars when used with older filter designs. Baader's CMOS-optimized LRGB filters feature advanced anti-reflection coatings on all surfaces, specifically calculated to suppress these artifacts at the source. This ensures clean, high-contrast data, even when imaging star fields containing bright targets like Alnitak or the stars of the Pleiades (M45).

    Balanced RGB Transmission for 1:1:1 Exposure Ratios

    This filter set is designed for imaging efficiency. The Red, Green, and Blue filters are balanced to deliver a roughly equal signal to a typical CMOS sensor, allowing you to use a 1:1:1 exposure ratio for all three color channels. This simplifies your imaging sequence by eliminating the need to calculate different sub-exposure times for each color, streamlining both acquisition and post-processing.

    Maximized Throughput with Sharp, Anti-Reflective Cutoffs

    Each filter in the set provides excellent light transmission within its target bandpass, coupled with sharp cutoffs that eliminate UV and IR contamination. This high transmission increases your signal-to-noise ratio, capturing more data in less time. Baader's Reflex-Blocker™ hard coatings and sealed coating edges (Life-Coat™) ensure the filters are durable, scratch-resistant, and protected against degradation from moisture, delivering consistent results for years.

    7 Available Formats: From 1.25" Mounted to 65x65mm Square

    To accommodate nearly any imaging setup, the Baader CMOS-Optimized LRGB set is available in seven different formats. Whether you use a small filter drawer with 1.25" filters or a large-format filter wheel for a full-frame sensor, there is a size to match your equipment and prevent vignetting.

    • Mounted: 1.25" and 2" standard threaded cells.
    • Unmounted Round: 31mm, 36mm, and 50.4mm for various filter wheels.
    • Unmounted Square: 50x50mm and 65x65mm for the largest professional sensors.

  • What does "CMOS-optimized" mean for the Baader LRGB filters?

    It means the filter coatings are specifically designed to suppress reflections between the filter and the highly reflective surfaces of a modern CMOS sensor and its cover glass. This technology, called Reflex-Blocker™, virtually eliminates the halos and internal reflections that can appear around bright stars, resulting in cleaner raw data.

    Are the Baader CMOS-Optimized LRGB filters parfocal?

    Yes, all Baader filters within a given size are manufactured to be parfocal. This means you should not need to refocus your telescope when switching between the Luminance, Red, Green, and Blue filters, which saves valuable imaging time and ensures sharpness across all channels.

    Will these Baader LRGB filters help with light pollution?

    The Luminance filter has a wide bandpass but includes a UV/IR cut, which helps slightly with unfocused light at the ends of the spectrum. However, these are broadband filters and are not designed for significant light pollution suppression. For imaging from light-polluted areas, they are best paired with a dedicated light pollution filter or used for targets high in the sky.

    How do I choose the right size Baader LRGB filter set for my setup?

    The correct size depends on your camera's sensor size and your filter wheel or drawer.

    • 1.25" or 31mm Unmounted: Best for sensors up to APS-C size with shorter focal length telescopes.
    • 2" or 36mm Unmounted: Ideal for APS-C and some full-frame sensors to avoid vignetting.
    • 50.4mm, 50x50mm, or 65x65mm: Necessary for full-frame and larger sensors, especially in fast optical systems (f/5 or lower), to ensure the entire sensor is illuminated without corner shadowing.

    I'm imaging the Pleiades (M45) with a fast refractor and a full-frame CMOS camera. Will these Baader filters prevent bright blue halos?

    Yes, this is precisely the scenario these filters are designed for. The intense blue reflection nebulosity and brilliant hot blue stars of the Pleiades (M45) are notorious for causing halos with non-optimized filters. The CMOS-optimized coatings on this Baader LRGB set will significantly reduce or eliminate those artifacts, producing sharp, clean stars against the nebulous background.

    If I use this Baader LRGB set on the Orion Nebula (M42) from my Bortle 7 backyard, will the Luminance filter block IR?

    Yes, all filters in the Baader LRGB set, including the Luminance filter, have a sharp IR-cut characteristic. This is critical for refractors and other systems that do not focus infrared light at the same plane as visible light. By blocking IR, the filters prevent star bloat and maintain sharp focus, which is especially important for resolving fine details like the Trapezium cluster within the Orion Nebula (M42).

  • Available Formats 1.25" Round Mounted, 2" Round Mounted, 31mm Round Unmounted, 36mm Round Unmounted, 50.4mm Round Unmounted, 50x50mm Square, 65x65mm Square
    Net weight (kg) 0.02 (1.25" Round Mounted, 31mm Round Unmounted Filter, 36mm Round Unmounted Filter)
    0.05 (2" Round Mounted)
    0.06 (50.4mm Round Unmounted Filter)
    0.08 (50x50mm Square Filter)
    0.13 (65x65mm Square Filter)
    Filter shape round (1.25" Round Mounted, 2" Round Mounted, 31mm Round Unmounted Filter, 36mm Round Unmounted Filter, 50.4mm Round Unmounted Filter)
    square (50x50mm Square Filter, 65x65mm Square Filter)
    Single or Set? Filter-Set
    Filter mounted Mounted (LPFC 6mm) (1.25" Round Mounted, 2" Round Mounted)
    Unmounted (31mm Round Unmounted Filter, 36mm Round Unmounted Filter, 50.4mm Round Unmounted Filter, 50x50mm Square Filter, 65x65mm Square Filter)
    Filter Usage CMOS, CCD, IR-Cut, Luminance, RGB, UV-Cut
    Type of Filter Bandpass
    Special Features CMOS-optimized with Life-Coat™
    Filter Thickness (without cell) 2 mm (1.25" Round Mounted, 2" Round Mounted, 31mm Round Unmounted Filter, 36mm Round Unmounted Filter)
    3 mm (50.4mm Round Unmounted Filter, 50x50mm Square Filter, 65x65mm Square Filter)
    CWL (Central Wavelength) LRGB
    Transmission Range L (420 – 685 nm), R (595 – 690 nm), G (490 – 580 nm), B (400 – 510 nm)
    AR-Coating Reflex-Blocker™ hard coated, planeoptically polished
    Suitable for f/ratio f/15 to f/1.8
  • Baader Planetarium Warranty