Astronomik offers a high-end series of RGB filters: the Astronomik Deep-Sky RGB filters are specifically designed to meet the needs of modern astrophotographers, delivering maximum image quality with all CMOS and CCD cameras. Use the Astronomik Deep-Sky RGB filter set to achieve images with unparalleled sharpness, contrast range, and vibrant colors.These filters are recommended for all modern CMOS and CCD cameras from companies such as ZWO/ASI, QHY, QSI, SBIG, ATIK, and ALTAIR. If you aim to capture the most beautiful images with your equipment, the Astronomik Deep-Sky RGB filters are the perfect choice!The Astronomik Deep-Sky RGB filters are the result of extensive, years-long research and development. We are proud to offer you the best RGB filters currently available for deep-sky imaging. The transmission range of these three filters is designed to allow the important emission lines in deep-sky photography to pass through, providing strong signals and vivid colors. Raw images captured with the Astronomik Deep-Sky RGB filter set can be easily combined into a stunning composite.Feedback from our customers has been extremely positive, mutually reporting smaller, sharper star images compared to conventional filters. This aligns with one of our primary development goals: achieving the highest contrast with pinpoint star images.During the development and testing of the Astronomik Deep-Sky RGB filters, we focused on the sensitivity curves of popular cameras used by modern astrophotographers. Instead of relying on manufacturer specifications, we conducted extensive measurements in our development lab. The result is excellent, balanced color reproduction and the best color contrast with all common sensors. The transmission characteristics and coating technology of the Astronomik Deep-Sky RGB filters ensure that no halos or reflections are visible. Even with bright stars in the field of view, nebulae and galaxies will be captured with the finest structures.In addition to the Astronomik Deep-Sky RGB filters, we offer three different Luminance filters (Astronomik L-1, L-2 and L-3 UV-IR Block). The different transmission ranges of each Luminance filter are designed to match the color correction of different telescopes in order to obtain the sharpest image with any optical design and camera, even with instruments with less-than-perfect color correction. Gallery of images taken with our Astronomik Deep-Sky RGB filters Additional note for photographers and observers under light-polluted skiesFor those working under light-polluted skies, consider using the Astronomik CLS CCD filter instead of a Luminance filter. The Astronomik CLS CCD filter captures luminance signals while effectively blocking high- and low-pressure sodium (Na)- and mercury (Hg)-vapor lamp lines, resulting in significantly less background noise. This substitution has been highly praised by customers worldwide, who report the advantages of the Astronomik CLS CCD filter for the luminance channel, making color deep-sky photography feasible in many regions.Suitability of the Astronomik Deep-Sky RGB filtersCMOS and CCD photography: Excellent for deep-sky imagingWebcam and video: Reasonable, used as a color filter for imaging planetsTechnical dataMaximum transmission typically 95% or betterAll Astronomik Deep-Sky RGB filters have IR- and UV-blocking Glass thickness: 1mm (except Astronomik OWB Type 3 and XT filters)Finely polished optical glass, free of any striae, residual stresses, and bubblesExtremely scratch-resistant and durable coatingCompletely resistant against high humidity and aging effectsAstronomik MFR coating (Astronomik Deep-Sky RGB, UV-IR Block L-1, L-2, L-3, and Narrowband-Emissionline filters)Parfocal with other Astronomik filtersDiffraction-limitedOptimized spectral windowsDelivered in a high-quality, long-lasting filter boxDue to the high-precision machining of the carrier substrate, all Astronomik filters are parfocal with wedge errors far below all common tolerances. Astronomik filters are diffraction-limited, ensuring that the optical performance (resolution and contrast) of your telescope is not compromised. Issues concerning focal distances and the exact alignment of images from each color channel are therefore effectively eliminated. All Astronomik filters are ideal for modern cameras, including both CMOS- and CCD-based models, ensuring you capture the best possible images with your equipment. Sharpness, contrast, and the absence of any reflections and halos are guaranteed. Even with bright stars in the field of view, nebulae and galaxies will be captured with the finest structures. The Astronomik MFR coating is designed for optimal performance across a wide range of focal ratios of the optics used.Every Astronomik filter undergoes a rigorous quality control process before delivery. Additionally, each Astronomik Narrowband-Emissionline filter is measured using a high-end PerkinElmer Spectrophotometer to ensure it meets the specifications published on our website. On the back of each Narrowband-Emissionline filter box, you will find a label detailing the precise spectral data for that specific filter, including the maximum transmission and the recommended range of focal ratios.

The Astronomik L-RGB Type 2c filter set is specially designed for astrophotography with CCD cameras, enabling natural color reproduction of planets, stars, emission nebulae, and reflection nebulae. It features highest transmission rates for short exposure times.Both stars and objects emitting light in spectral lines are shown in their true colors, as if the objects were bright enough to be seen with photopic vision. This distinctive feature sets Astronomik filters apart from others. The Astronomik L-RGB Type 2c filter set divides the spectrum into its components: red, green, blue, and luminance. This allows for color separation with pure b/w CCD sensors, corresponding to the color sensitivity of the human eye according to DIN 5032. Astronomik focuses not just on capturing images but also on providing astrophotographers with a tool that facilitates a simple and elegant editing process. To maintain color accuracy, the Astronomik L-RGB Type 2c filter set is designed on the base of the sRGB color space, which is an industry standard used by most manufacturers of monitors, printers, and imaging software. AlternativesIf you want to take great deep-sky images with a modern CMOS or CCD camera from brands like ZWO/ASI, QHY, QSI, SBIG, ATIK, and ALTAIR, we recommend our Astronomik Deep-Sky RGB filter set.Suitability of the Astronomik L-RGB Type 2c filtersCMOS and CCD photography: Good color separation for RGB and L-RGB imagesWebcam and video: Excellent, used as a color filter for imaging planetsTechnical dataTypical transmission of 95-97%Suitable for all focal ratiosAll Astronomik L-RGB Type 2c filters have IR- and UV-blocking Glass thickness: 1mm (except Astronomik OWB Type 3 and XT filters)Finely polished optical glass, free of any striae, residual stresses, and bubblesExtremely scratch-resistant and durable coatingCompletely resistant against high humidity and aging effectsAstronomik MFR coating (Astronomik Deep-Sky RGB, UV-IR Block L-1, L-2, L-3, and Narrowband-Emissionline filters)Parfocal with other Astronomik filtersDiffraction-limitedOptimized spectral windowsDelivered in a high-quality, long-lasting filter boxDue to the high-precision machining of the carrier substrate, all Astronomik filters are parfocal with wedge errors far below all common tolerances. Astronomik filters are diffraction-limited, ensuring that the optical performance (resolution and contrast) of your telescope is not compromised. Issues concerning focal distances and the exact alignment of images from each color channel are therefore effectively eliminated. All Astronomik filters are ideal for modern cameras, including both CMOS- and CCD-based models, ensuring you capture the best possible images with your equipment. Sharpness, contrast, and the absence of any reflections and halos are guaranteed. Even with bright stars in the field of view, nebulae and galaxies will be captured with the finest structures. The Astronomik MFR coating is designed for optimal performance across a wide range of focal ratios of the optics used.Every Astronomik filter undergoes a rigorous quality control process before delivery. Additionally, each Astronomik Narrowband-Emissionline filter is measured using a high-end PerkinElmer Spectrophotometer to ensure it meets the specifications published on our website. On the back of each Narrowband-Emissionline filter box, you will find a label detailing the precise spectral data for that specific filter, including the maximum transmission and the recommended range of focal ratios.