New ZWO 2″ filter drawer featuring the anti-light-leaking design that can effectively solve the light leaking issue under long exposure.

NEW: Double strong magnets adopted for stronger adsorption, easier installation and filter removal.

Lock screw on the side for you to adjust the tension of the holder to eliminate gap. It's a way to make sure the filter is positioned correctly. 

M54 filter drawer

• Diameter 70mm * Thickness 20mm
• M54 * 0.75 male (external) thread (camera side)
• M48 * 0.75 female (internal) thread (filter end)
• M54 * 0.75 female (internal) thread (telescope side)
• Suitable for 2-inch astronomical filters and full frame cameras, such as ASI2600MC Duo, ASI6200 and ASI2400 series.

Narrowband filter does not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

It can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Technical Parameter:

Name: ZWO New narrowband 1.25″ filter

Size: 1.25″

Thickness: 5.5mm+2.5mm(thread)

Glass thickness: 1.85mm

Thread: M28.5*0.6 male thread

The ZWO H-Alpha filter has a bandpass of 7nm and passes light at 656nm wavelength, light transmission rate comes up to 80%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!

The ZWO narrowband S-II 7nm filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.

The ZWO narrowband O-III 7nm filter is designed for nebula observation allowing the 7nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, blocking out all other light. Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favourite nebulas in a totally new light, no matter how polluted your skies may be!

Technical Data

• FWHM：7±0.5nm
• Glass Thickness 2.0+/-0.03 mm (1.25”/31mm/36mm)
• Fine-optically polished to ensure accurate 1/4 wavefront over the both surfaces
• About 90% transmission at H-alpha line 656nm (H-Alpha filter )
• About 90% transmission at SII line 672nm (SII filter )
• About 90% transmission at major OIII line 500nm (OIII filter )
• Infrared wavelength 700-1100nm cut-off
• <0.1% transmission of off-band, OD3(Optical Density)

Transmission Curve

We made a test of our Ha Filters (ASI1600 mono camera, single frame, 300s, DDP in MaximDL) :

1. L-eXtreme F/2 Introduction

Optolong L-eXtreme F/2 is a dual-band (500.7 nm and 656.28 nm, FWHM=7 nm) narrowband pass filter that meets the requirements for transmission at continuously varying angles. Astronomically characterised spectral lines (OIII, Ha) as the main transmission wavelengths, the OIII and H-Alpha nebula emission lines pass accurately at f2 - f3.3 Focal Ratio. It's a product that Optolong has developed specifically for fast optical systems or fast focal ratio imaging systems. It has performed well on RASA, HyperStar, and other fast ratio telescopes.

Key Features:

♦Together with one-shot colour astronomical cameras, monochrome astronomical cameras, and Digital SLR cameras, you can fast and quickly obtain clear and detailed images of the deep sky;

♦Ideal for fast optical systems, like RASA, Hyperstar, and other fast focal ratio telescope users;

♦Recommended for using a fast optical system with a focal ratio from f2 to f3.3;

♦Anti-light pollution、better contrast、more details of the celestial bodies: This filter cuts out background light and noise beyond the target celestial bodies to get better details and contrast of the images. L-eXtreme F/2 can effectively block light pollution so that the images will not affected by unwanted lights and skylight of the background. You can quickly get satisfactory pictures in fast optical systems.

2. Spectrum and Characteristic

Based on the characteristics of celestial bodies’ emission lines and light pollution emission lines, the L-eXtreme F/2 retains the prominent nebula OIII and Ha colours while blocking most of the light pollution. Specifically designed and optimally calculated for the characteristics of a fast optical system, the L-eXtreme F2 always keeps both OIII and Ha bands having high transmittance, which helps users to capture nebulae emission lines in these bands more accurately and quickly and obtain better astrophotographic images.

How to read the chart?

▲The horizontal axis is the Wavelength in Nanometers(nm).

▲The vertical axis is transmission in %.

3. Coating Technology

·Multi-layers anti-reflection coating

·Non-cementing optical substrate coating

·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.

·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.

SKU: 14803

Ever tried look at the Full Moon through a telescope? You'll know just how bright it can be!

The saxon 1.25" Moon Filter helps reduce glare and increase the contrast of the Moon allowing you to see the fine details on craters, mountains and across the Lunar plains, called Mare.

Optolong L-Synergy Dual Narrowband Filter

The Optolong L-Synergy filter is designed for astrophotographers using DSLR, color CMOS, or CCD cameras who want to achieve stunning narrowband results without switching to a monochrome system. By pairing traditional dual-narrowband (Ha & OIII) concepts with a unique “Ha & OIII + SII & OIII” approach, L-Synergy overcomes the usual limitations of colour cameras and makes Hubble-Palette–style imaging accessible to everyone.

With this filter, you can produce deep, high-contrast SHO-like images of emission nebulae using your existing colour camera—no additional SHO filters or monochrome upgrade required. It’s an affordable way to achieve professional-level results even under bright suburban skies.

Why Choose the L-Synergy Filter?

The L-Synergy is a dual 7 nm narrowband filter engineered for telescopes with an f/ratio of f/3.3 or slower. Years of optical refinement have produced a design that suppresses bright star halos while delivering extremely high transmission in the key emission bands.

• Selective Narrowband Performance
  Transmits only the OIII (500.7 nm) and SII (672.4 nm) nebula emission lines, rejecting unwanted wavelengths and light pollution.

• Exceptional Contrast and Signal-to-Noise
  By isolating the oxygen and sulfur signals, the filter produces a darker background sky and dramatically improves contrast—especially valuable in heavily light-polluted environments.

• Light-Pollution Resistant
  Filters out the vast majority of urban skyglow, allowing astrophotographers to capture clean, detailed nebula structure from almost any location.

Optical Design

L-Synergy is precision-engineered based on the spectral behaviour of emission nebulae and common light-pollution sources. Its carefully tuned passbands maintain consistently high transmission in both SII and OIII, ensuring accurate colour capture and high-quality data for processing.

The result: a powerful, easy-to-use narrowband solution that unlocks deep-sky imaging performance far beyond what typical colour cameras can achieve, giving more astrophotographers access to true SHO-style imaging.

New from ZWO

ZWO Narrowband 7nm filter set increases the contrast between nebula and night sky by helping to reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Details

Name: ZWO Narrowband 7nm filter Set 2in

Size: 2″

Thickness: 5mm+2.5mm(thread)

Thread: M48.5*0.75 male thread

The ZWO narrowband H-Alpha filter has a bandpass of 7nm and passes light at 656nm wavelength, light transmission rate comes up to 80%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!

The ZWO narrowband S-II 7nm filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.

The ZWO narrowband O-III 7nm filter is designed for nebula observation allowing the 7nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, blocking out all other light. Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulae in a totally new light, no matter how polluted your skies may be!

Technical Data

• FWHM：7±0.5nm
• Fine-optically polished to ensure accurate 1/4 wavefront over the both surfaces
• About 90% transmission at H-alpha line 656nm (H-Alpha filter )
• About 90% transmission at SII line 672nm (SII filter )
• About 90% transmission at major OIII line 500nm (OIII filter )
• Infrared wavelength 700-1100nm cut-off
• <0.1% transmission of off-band, OD3(Optical Density)

Transmission Curve

ZWO Ha 7nm filter 2in increases the contrast between nebula and night sky by helping to reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

The ZWO Ha 7nm Filter filter has a bandpass of 7nm and passes light at 656nm wavelength, light transmission rate comes up to 80%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!

Technical Data

• FWHM：7±0.5nm
• Fine-optically polished to ensure accurate 1/4 wavefront over the both surfaces
• About 90% transmission at H-alpha line 656nm (H-Alpha filter )
• Infrared wavelength 700-1100nm cut-off
• <0.1% transmission of off-band, OD3(Optical Density)

Transmission Curve

• High-quality, fully multi-coated optical glass with dichroic coatings to block infrared (IR) light
• Provides the best colour balance and sharpness
• Totally removable, providing ultimate flexibility--no need to purchase a camera with built-in IR-block
• Compatible with Skyris colour cameras and The Imaging Source astronomy cameras

Optolong L2 Dual-Combo Filter Set

The Optolong L2 Dual-Combo Set includes two premium dual-narrowband filters, L-eXtreme and L-Synergy, designed for colour-camera astrophotography. Compatible with telescopes f/3.3 and slower, this set allows users to capture Hubble Palette deep-sky images without switching to a monochrome camera or buying a full three-filter SHO set. It provides professional-level narrowband imaging with minimal investment.

The L-eXtreme transmits OIII (500.7 nm) and Hα (656.3 nm), blocking unwanted light-pollution wavelengths to deliver bright nebula details with high contrast. Years of refinement optimise performance and reduce bright star halos.

The L-Synergy transmits OIII (500.7 nm) and SII (672.4 nm) with high efficiency while rejecting other wavelengths. It minimises light pollution effects and preserves nebula detail, producing clean data for processing.

The combination of these filters allows colour-camera users to achieve Hubble Palette imaging efficiently. It enhances nebula structure, improves contrast, and enables richer colour separation in light-polluted skies.

The filters are engineered to preserve the distinctive colours of nebulae while filtering out most light pollution. Their tuned transmission profiles ensure strong signal in the target emission lines and high signal-to-noise performance for detailed deep-sky images.

This set is ideal for astrophotographers using colour cameras who want professional-quality narrowband imaging with existing equipment.

Antlia SII 3nm Pro narrowband filter optimizes the FWHM (full-width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance the contrast of emission targets by lowering the unwanted background signal. Antlia SII 3nm Pro filter is designed to deliver 88% transmission at the 671.6nm line which provides you with the maximum signal and well-defined nebulae structures.

Conventional broader narrowband filters cause a heavy loss in transmission due to the strong (Center Wavelength (CWL)-shift. We guarantee T>88% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. Blue-shift data show that Antlia SII 3nm Pro filters can be used with nearly all systems as fast as f/3 with minimal loss in emission signal and meet the requirements of fast optics like Hyperstar and RASA.

The out-of-band blocking specification is rated OD5 (0.001%) which delivers an excellent SNR(signal-to-noise ratio) and effective cut-off rate to minimize interference from other wavelengths. Improved sharp cut-off astrophotography 3nm Pro filters are designed to minimize halos around bright stars.

Application and Performance:

High transmittance and smallest bandwidth to maximize contrast

A steep spectral profile minimizes halos around bright stars

A single substrate to eliminate internal reflections

Narrowband Objects: SII Emission Nebulae, Planetary, Wolf-Rayet Nebulae and Supernova Remnants

Use in light-polluted areas and dark sites

Extend imaging time when the moon is up

All Antlia narrowband Pro filters can be used down to F/3 with a slight loss of signal

All Antlia Narrowband filters are edge-blackened to eliminate internal reflections from stray light

Superior optical reliability reduces post-image processing

This filter is not suited to deep-sky objects that do not contain SII emissions.

Technical Specifications:

Basic Substrate: Schott optical substrate

Filter Thickness：2mm+/-0.05mm for 2'' mounted

FWHM (Full width at half maximum): 3nm

CWL (Central Wavelength): 671.6nm

Peak Transmission: ＞88%

Blocking: > 5 OD(0.001% out of band blocking) @ 300-1000nm

Surface Quality: S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830)

Transmitted Wavefront: Lambda/4 or better.

Parallelism: less than 30 arcsec

Single / Non-glued substrate

Warranty: 3 years against delamination

SKU: ANTLIASii3nm2

ZWO Narrowband 7nm 36mm Filter Set

ZWO Narrowband 7nm 36mm filter set increases the contrast between nebula and night sky by helping to reduce the transmission of certain wavelengths of light, specifically, those produced by artificial light including mercury vapour, and both high and low-pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Details

Name: ZWO Narrowband 7nm 36mm filter set

Size: 36mm

Thickness: 2mm

The ZWO narrowband H-Alpha filter has a bandpass of 7nm and passes light at 656nm wavelength, the light transmission rate comes up to 80%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!

The ZWO narrowband S-II 7nm filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae, and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.

The ZWO narrowband O-III 7nm filter is designed for nebula observation allowing the 7nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, blocking out all other light. Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulae in a totally new light, no matter how polluted your skies may be!

Technical Data

• FWHM：7±0.5nm
• Fine-optically polished to ensure an accurate 1/4 wavefront over both surfaces
• About 90% transmission at H-alpha line 656nm (H-Alpha filter )
• About 90% transmission at SII line 672nm (SII filter )
• About 90% transmission at major OIII line 500nm (OIII filter )
• Infrared wavelength 700-1100nm cut-off
• <0.1% transmission of off-band, OD3(Optical Density)

Transmission Curve

SKU: ZWO-NB7nmD36

The transmission properties of the L-RGB Filterset 1.25in Type 2c filters are optimized for CCD astrophotography. The set allows taking images in correct colours for all types of objects. Where other brands make strange compromises, we do the best colour reproduction possible. Both stars as well as objects that emit only in spectral lines, are reproduced in their true colors. You get CCD images with perfect colours, as if the objects where bright enough to be seen with photopic vision. This feature is the main difference between Astronomik filters an those of other manufacturers.

The following aspects have been most important for the design of our filters:

- simple image processing for the user

- highest transmission (nearly 100%) for short exposure times

- adjusted transmissions of the individual filters for optimal colour reproduction

- the use of industry standards

Astronomik doesn't stop thinking at the step of taking the picture. More important a tool should be given to the astrophotographers that offers a simple and elegant editing process. To maintain the colour, we calculated our filterset for the sRGB color space, that is used as an industry standard from most manufacturers of monitors, printers and imaging software. As a user, you do not need to spend time learning about colourimetry and colour spaces. We have solved the special problems of astrophotography for you.

Due to the high-precision machining of the carrier substrate, our filters are parfocal with wedge errors below all usual margins. In order not to be the bottleneck in a high-quality optical system Astronomik filters are of course diffraction limited. Issues concerning focal distances as well as the exact location of the images of each colour image are not a problem at all!

Main use

The L-RGB filter set divides the spectrum into its components red, green, blue and luminance. Thus colour separation can be achieved with pure b/w CCD sensors. The separation corresponds to the colour sensitivity of the human eye according to DIN 5032. By using the sRGB color space it is possible to maintain the color of the image throughout the entire image processing and output. With an Astronomik L-RGB filter set and your camera you create ideal raw material for image processing in the sRGB color space.

SKU: 8h0039

The ZWO SII 7nm 2in filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.

Technical Data

• FWHM：7±0.5nm
• Fine-optically polished to ensure accurate 1/4 wavefront over the both surfaces
• About 90% transmission at SII line 672nm (SII filter )
• Infrared wavelength 700-1100nm cut-off
• <0.1% transmission of off-band, OD3(Optical Density)

Transmission Curve

ZWO OIII 7nm 2in filter increases the contrast between nebula and night sky by helping to reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Details

Name: ZWO Narrowband 7nm filter Set 2in

Size: 2″

Thickness: 5mm+2.5mm(thread)

Thread: M48.5*0.75 male thread

The ZWO OIII 7nm 2in filter is designed for nebula observation allowing the 7nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, blocking out all other light. Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulae in a totally new light, no matter how polluted your skies may be!

Technical Data

• FWHM：7±0.5nm
• Fine-optically polished to ensure accurate 1/4 wavefront over the both surfaces
• About 90% transmission at major OIII line 500nm (OIII filter )
• Infrared wavelength 700-1100nm cut-off
• <0.1% transmission of off-band, OD3(Optical Density)

Transmission Curve

Antlia OIII 3nm Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance the contrast of emission targets by lowering the unwanted background signal. Antlia OIII 3nm Pro filters are designed to deliver 85% transmission at the 500.7nm line which provides you with the maximum signal and well-defined nebulae structures.

Conventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL) shift. We guarantee T>85% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. Blueshift data shows that Antlia 3nm Pro filters can be used with nearly all systems as fast as f/3 with minimal loss in emission signal and meet the requirements of fast optics like Hyperstar and RASA.

The out-of-band blocking specification is rated OD5 (0.001%) which delivers an excellent SNR(signal-to-noise ratio) and effective cut-off rate to minimize interference from other wavelengths. Improved sharp cut-off astrophotography 3nm Pro filters are designed to minimize halos around bright stars.

Application and Performance:

High transmittance and smallest bandwidth to maximize contrast

Steep spectral profile minimizes halos around bright stars

A single substrate to eliminate internal reflections

Narrowband Objects: OIII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants

Use in light polluted areas and dark sites

Extends imaging time when the moon is up

Antlia narrowband Pro filters can be used down to F/3 systems with slight loss of signal

All Antlia Narrowband filters are edge blackened to eliminate internal reflections from stray light

Superior optical reliability reduces post image processing

This filter is not suited to deep sky objects that do not contain OIII emissions.

Technical Specifications:

Basic Substrate: optical substrate

Filter Thickness: 2mm+/-0.05mm for 2'' mounted

FWHM (Full width at half maximum): 3nm

CWL (Central Wavelength): 500.7nm

Peak Transmission: ＞85%

Blocking: > 5 OD(0.001% out of band blocking) @ 300-1000nm

Surface Quality: S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830)

Transmitted Wavefront: Lambda/4 or better.

Parallelism: less than 30 arcsec

Single / Non-glued substrate

Warranty: 3-years against delamination

DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.

When we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the blocking and bandpass parameters to achieve an optimum result. The out-of-band blocking rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia OIII 3nm Pro filter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the OIII signal. Such filters are more difficult to produce to a consistently high standard.

Each filter is individually tested and scanned to ensure that the quality meets the high-performance parameters. The end result is a filter that achieves excellent contrast but with a higher production cost. We believe the price-to-performance ratio compares more favorably than similar premium filters in the market.

SKU: ANTLIAOIII3nm2

The Atik 2" narrowband filter set are designed with a band pass of 7 nm to aid in capturing all a nebula’s photons while the vast majority of the broad band light pollution is stopped. The result is a much higher signal to noise revealing faint details in nebulas. The Narrow band filter set comprises of Hydrogen-Alpha (Ha), Sulphur (SII) and Oxygen (OIII). Take advantage of our special offer. Get 50% off any filter set (or both filter sets), when you buy any Atik mono camera (with the exception of the Atik GP).

The ATIK 2" narrowband filter set is compatible with our filter wheels and allows astrophotographers to capture deep-sky objects in spectacular narrow band. This filter set is commonly used to image objects in the Hubble pallet.

Bandwidth:

• SII 7nm
• Ha 7nm
• OIII 7nm

Peak Transmission: minimum 80%

CWL (centre of wavelength):

• Ha 656.3nm
• SII 671.6nm
• OIII 500.7nm

Size: 2” mounted
Transmitted Wavefront RMS: λ/4
Parallelism(arcsec): 30s

SKU: ATK0205

ZWO 8x31mm Filter Mask are used for fitting unmounted filters to ZWO filter wheels.

Please use the M2 screws and masks to fix the filters:

⚫ Remove the screws securing the back cover and remove the back cover

⚫ Place filters onto the filter positions.

⚫ Use the included M2 screws with masks to secure the filters in place.

⚫ Replace the back cover and tighten the screws.

Drawing of 31 mm Mask

ATIK 36mm Narrowband Filter Set

The Atik 36mm Narrowband filter set is designed with a band pass of 7 nm to aid in capturing all a nebula’s photons while the vast majority of the broad band light pollution is stopped. The result is a much higher signal to noise revealing faint details in nebulas. The Narrow band filter set comprises of Hydrogen-Alpha (Ha), Sulphur (SII) and Oxygen (OIII). Take advantage of our special offer. Get 50% off any filter set (or both filter sets), when you buy any Atik mono camera (with the exception of the Atik GP).

The Atik Narrowband 36mm filter set is compatible with our filter wheels and allows astrophotographers to capture deep-sky objects in spectacular narrow band. This filter set is commonly used to image objects in the Hubble pallet.

Atik Narrowband 36mm Filter Set Specifications:

Bandwidth:

• SII 7nm
• Ha 7nm
• OIII 7nm

Peak Transmission: minimum 80%

CWL (centre of wavelength):

• Ha 656.3nm
• SII 671.6nm
• OIII 500.7nm

Size: 36mm unmounted
Transmitted Wavefront RMS: λ/4
Parallelism(arcsec): 30s

SKU: ATK0204

The ATIK LRGB 2" filter set consists of Luminance, Red, Green and blue filters, that have been designed for CCD cameras to image deep sky objects, galaxies and stars in their natural colour. Take advantage of our special offer. Get 50% off any filter set (or both filter sets), when you buy any Atik mono camera (with the exception of the Atik GP).

If a natural colour representation is what you want from you deep-sky imaging, an LRGB filter set should be your first choice. With OIII emission overlapping on the blue and green filters to allow high efficiency and natural colour imaging of all deep-sky objects. The gap between green and red filters serves to block out the light pollution line at 589nm and improves the colour of your images.

ATIK LRGB 2" Specifications

Transmission: Average 95%
Size: 2”
Coating Wavelength: 300-1050nm
Transmitted Wavefront RMS: λ/4
Parallelism (arcsec): 30s

SKU: ATK-0164

The ATIK Narrowband 1.25" filters are designed with a band pass of 7 nm to aid in capturing all a nebula’s photons while the vast majority of the broad band light pollution is stopped. The result is a much higher signal to noise revealing faint details in nebulas. The Narrow band filter set comprises of Hydrogen-Alpha (Ha), Sulphur (SII) and Oxygen (OIII). Take advantage of our special offer. Get 50% off any filter set (or both filter sets), when you buy any Atik mono camera (with the exception of the Atik GP).

The ATIK Narrowband 1.25" filter set is compatible with our filter wheels and allows astrophotographers to capture deep-sky objects in spectacular narrow band. This filter set is commonly used to image objects in the Hubble pallet.

ATIK Narrowband 1.25" Specifications

Bandwidth:

• SII 7nm
• Ha 7nm
• OIII 7nm

Peak Transmission: minimum 80%

CWL (centre of wavelength):

• Ha 656.3nm
• SII 671.6nm
• OIII 500.7nm

Size: 1.25” mounted, 36mm unmounted or 2” mounted
Transmitted Wavefront RMS: λ/4
Parallelism(arcsec): 30s

SKU: ATK0203