SVBONY SV220 Telescope Filter: 2 Dual-Band Nebula Filter, H-Alpha and O-III Narrowband Filter, Light Pollution Filter

Observation Discovery & Exploration brand introduces the SV220 dual-band filter for astrophotography. This filter is designed to capture emission nebulae, planetary nebulae, and supernova remnants with high transmission and sharp cut-off, enhancing image contrast and revealing detailed information of deep-sky objects. The 7nm dual-band filter allows for highly transparent OIII (500.7nm) and H-Alpha (656.3nm) nebula emission lines, isolating the emissions into H-Alpha (red) and OIII (green-blue) to reduce the effect of light pollution. This allows for nebula shooting in light-polluted cities or under a full moon, eliminating the need to travel to remote locations and saving time and fuel.

The SV220 dual-band filter is easy to use and simplifies the post-processing process for users. It can achieve single exposures to capture large size images for deep sky photography. The specifications of the SV220 dual-band filter are as follows:

• Name: Duo-Band OSC Filter
• Size: 2-Inch
• Substrate Thickness: 1.80mm
• Clear Aperture: 44mm
• Wavelength Range: 300-1100nm
• FWHM: OIII (7nm) & HA (7nm)
• Blocking: OD5
• Peak transmittance: 500.7nm@T>90%; 656.3nm@T>94%
• Surface Quality: 60/40
• Surface parallelism: 1/4λ
• Thread: M48x0.75
• Single Thread: Yes

The SV220 dual-band filter is a game changer for astrophotography, reducing light pollution and enhancing contrast for imaging nebulae. It simplifies the process for users and allows for capturing stunning images in light-polluted areas or under a full moon.

product information: