ZWO 1.25″ IR UV CUT filter is suitable for color camera with AR protect window.
The ZWO IR-Cut Filter blocks infrared light from reaching the sensor of your CCD or CMOS camera or your expensive H-alpha filter. When imaging, the addition of this simple and inexpensive accessory will result in sharper images, and when doing solar work, the IR Cut Filter will your protect H-alpha filter from the damaging effects of infrared radiation.
Infrared or IR light is invisible to the human eye, and so even though most telescopes are not designed to focus IR light, it does not matter when you are using your telescope visually. However, when you add a camera to the mix, its a whole other story! Unlike the human eye, a silicon sensor is very sensitive to light in the infrared portion of the spectrum, and that is a problem because infrared images are blurry as all get out. That means your nice, sharp visual light image is degraded by the addition of the infrared layer. This problem can easily be solved by blocking the infrared, and the ZWO IR Cut-Off, will do just that.
The ZWO IR-Cut filter is housed in a 1.25” cell. The filter comes with a protective plastic case.
The filter blocks out ultraviolet and infrared light. This will improve the image on many telescopes.
Sensors from webcams or CCD cameras are sensitive to UV and IR light. Objectives or lenses are not well corrected in these areas, because neither the human eye nor the conventional film is sensitive in this area. Without an IR/UV cut filter, the contrast of the image would suffer. Once there is glass somewhere in the system (lens, correction plate, eyepiece, Barlow, …), the IR/UV cut filter will improve the photographic result when used with cameras having an AR window.
The filter is used for luminance images and for lunar and planetary images.
The filter adapter ring that allows you to use the filter with a smaller filter thread size.
No need for buying another set of filter drawers, the 2”-1.25” filter adapter ring will help you directly fit the 1.25”filter onto 2” filter drawer or filter wheel.
Supported list:
ZWO 5×2”EFW
ZWO 7×2” EFW
ZWO filter drawer series, including M42 filter drawer and M54 filter drawer
An affordable LRGB filter set by ZWO, 36mm unmounted filters. LRGB filters allow you to take true color photos with a monochrome camera. We recommend using this filter set with the ZWO EFW Mini.
ZWO Duo-Band Filter is a dual narrowband filter primarily aimed at complementing our range of colour ASI cameras. The Duo-Band filter is aimed at the astronomer who may already own a One Shot Colour (OSC) camera and wants to image using narrowband techniques or emission objects without purchasing a mono camera, filter wheel and narrowband filter set.
The Duo-Band filter offers an economical entry into the world of narrowband imaging and can also offer a practical solution to imaging in light polluted urban areas.
The dual band pass nature of the Duo-Band filter passes light at Hα (656.3nm) and OIII (500.7nm) wavelength, and can reduce the interference from natural light sources such as moonlight, or artificial light pollution such as street lighting.
It can help improve the contrast and visibility of deep sky objects such as emission nebula using a OSC camera.
If you are looking for a solution to deep sky photography in light pollution area, then ZWO Duo-Band Filter will be a great choice.
The Duo-Band filter can be used with all ASI cameras and EFW Electronic Filter Wheel and comes in 1.25” and 2” sizes.
ZWO Duo-Band Filter is a dual narrowband filter primarily aimed at complementing our range of colour ASI cameras. The Duo-Band filter is aimed at the astronomer who may already own a One Shot Colour (OSC) camera and wants to image using narrowband techniques or emission objects without purchasing a mono camera, filter wheel and narrowband filter set.
The Duo-Band filter offers an economical entry into the world of narrowband imaging and can also offer a practical solution to imaging in light polluted urban areas.
The dual band pass nature of the Duo-Band filter passes light at Hα (656.3nm) and OIII (500.7nm) wavelength, and can reduce the interference from natural light sources such as moonlight, or artificial light pollution such as street lighting.
It can help improve the contrast and visibility of deep sky objects such as emission nebula using a OSC camera.
If you are looking for a solution to deep sky photography in light pollution area, then ZWO Duo-Band Filter will be a great choice.
The Duo-Band filter can be used with all ASI cameras and EFW Electronic Filter Wheel and comes in 1.25” and 2” sizes.
ZWO 2-inch Filter Drawer with 21mm ring design is independently developed by ZWO, which includes M42 * 0.75 male thread (camera side) and M48 * 0.75 female thread (filter end), M48 * 0.75 female thread (telescope side) as well.
The double strong magnets create stronger adsorption, easier installation and pulling out.
The New filter Drawer for EOS Lens, 26.5mm thickness is independently designed by ZWO and specifically made to match with ASI cooled cameras and EOS lens. You can freely use the 2” mounted filter with it.
It’s compatible with all ASI cooled cameras with 17.5mm back focus length (except ASI GT series).
It’s compatible with all ZWO 2” filters, including the duo-band filter, narrowband filter, IR-cut filter, etc.
With the ability of double strong magnetic adsorption, it is more convenient and much easier to install or pull out the filter
The thread of the interface is M42*0.75. You can also use the included M54M-M42F adapter to connect the filter drawer to a full-frame camera.
ZWO IR pass 850 nm allows only infrared light trought, no visible light. This is most useful for Moon and planetary photography, especially during daytime. Usually bright, blue sky is converted to pitch black darkness, thanks to high IR pass filter.
An affordable LRGB filter set by ZWO. LRGB filters allow you to take true color photos with a monochrome camera. We recommend using this filter set with the ZWO EFW Mini.
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).
From 2018, ZWO Made a progress on narrowband filters with the new standard, provide better performance.
Technical Parameter:
Name: ZWO New narrowband 1.25″ filter
Size: 1.25″
Thickness: 5mm+2.5mm(thread)
Glass thickness: 1.85mm
Thread: 28.5*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 favorite nebulas 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)
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).
From 2018, ZWO Made a progress on narrowband filters with the new standard, provide better performance.
Technical Parameter:
Name: ZWO New narrowband 2″ filter
Size: 2″
Thickness: 5mm+2.5mm(thread)
Glass thickness: 1.85mm
Thread: M48*0.75 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 favorite nebulas 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)
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).
From 2018, ZWO Made a progress on narrowband filters with the new standard, provide better performance.
Technical Parameter:
Name: ZWO New narrowband 31mm filter
Size: 31mm
Glass thickness: 2 mm
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 favorite nebulas 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)
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).
From 2018, ZWO Made a progress on narrowband filters with the new standard, provide better performance.
Technical Parameter:
Name: ZWO New narrowband 36mm filter
Size: 36mm
Glass thickness: 2 mm
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 favorite nebulas 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)
