SVBONY SV240 Multi-Narrowband Near-infrared Light Pollution Filter 2" Mounted | W9191A
W9191A
SVBONY SV240 Multi-Narrowband Near-infrared Light Pollution Filter 2" Mounted | W9191A
W9191A
Products in the Same Family
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Product Description
SVBONY SV240 multi-bandpass filter is designed for urban astrophotography; it can isolate the Ha; OIII; and H-Beta from the background light pollution efficiently; you can astrophotography in urban without a long struggle to suburbs; save your time and high efficiency; and it is suitable for photoing most galaxies; reflection nebulae; emission nebula; and star clusters; and so on. The filter is ideal for astronomers who are already using color cameras and prefer not to switch to a monochrome camera setup. With the SV240, you can capture more details that cannot be achieved with the SV220.
Cut-off Depth ≥ OD4
Highly efficient in blocking urban light pollution or other background light; use this multi-bandpass filter for astrophotography in urban without traveling long distances to the suburbs. The SV240 narrowband filter can block the influence of urban light pollution and other background lights efficiently.
FWHM; 24nm; 20 nm; 115 nm; the wide wavelength and high transmittance of this multi-bandpass filters in Ha; OIII; H-Beta wavelength helps the colorful images
Resistant of BORTLE 8
The multilayer coating design for the remarkable performance in tacking light pollution and high transmittance in core wavelength. Astrophotography in urban comfortable. The strong ability to tacking light pollution up to BORTLE 8 allows it can be used in multiple cities, and no need to go to the suburbs. Time and labor saving.
Wavelength Range of The Filter
The wide range allows the filter to be used in multiple scenarios. Stronger resistance to light pollution. Near IR (NIR) is blocked up to 1100nm. High ability to process the wavelength from 300 to 1100nm. Effectively isolate the light pollution band.
Average Transmittance >90%
Photography All Kinds of Targets
The wavelength can meet the astrophotography needs of most galaxies, reflection nebulae, emission nebula, star clusters, and other broad-spectrum targets. And the targets can be captured in a short time, which is widely used and high efficiency.
If you have different astrophotography systems, no need to prepare dedicated filters; one SV240 can meet your needs due to its high compatibility. Considering the high quantum efficiency (QE) characteristics of the latest cameras (such as IMX585 and IMX464) in the near-infrared region and also this region less susceptible to artificial light pollution, the SV240 multi-narrowband filter adds high transmission in the near-infrared (NIR) band. This spectrum design improves the image signal-to-noise ratio and contrast by capturing signal in visible bands and NIR regions while maintaining good colour balance and being easier to manage in post-processing.
The SV240 astronomical telescope filter efficiently blocks light pollution to capture galaxies, nebulae, and star clusters. Its high compatibility, near-infrared transmission, and multi-wavelength coverage make it ideal for urban settings.
Parameter Comparison
What's in the Box
Specifications
|
Brand |
SVBONY |
|
Model |
SV240 |
|
Name |
Multi-Narrowband Filter |
|
Size |
2-inch |
|
Substrate Thickness |
2mm |
|
Clear Aperture |
44mm |
|
Wavelength Range |
300-1100nm |
|
FWHM |
24nm & 20nm & 115nm |
|
Blocking |
>OD5@300-450nm；>OD4@560-620nm；>OD2>690-750nm； >OD3@940-1100nm |
|
Peak Transmittance |
T＞95%@486.1nm；T＞92%@495.9nm；T>85%@500.7nm；T>95%@656.3nm； Tavg>95%@830-870nm |
|
Surface Quality |
60/40 |
|
Surface Parallelism |
1/4λ |
|
Thread |
M48x0.75 |
|
Single Thread |
Yes |
|
Net Weight |
12.5g / 0.44oz /0.027lb |
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