SVBONY SV240 2" Multi-Narrowband Galaxy&Nebula Filter for Urban Astrophotography For Sale
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SVBONY SV240 2" Multi-Narrowband Galaxy&Nebula Filter for Urban Astrophotography:
$139.99
A new galaxy and nebula filter intended for shooting not only nebulae, but also galaxies by the use of the transmittance around the near infrared region. Considering the high quantum efficiency (QE) characteristics of the latest cameras (such as IMX585 and IMX464) in the near-infrared region and taking into consideration that this region is less susceptible to artificial light pollution, the 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.
SVBONY SV240 2" Multi-Narrowband Galaxy&Nebula Filter for Urban Astrophotography.Click to view productsTransmittance wavelengthOIII (7nm) & HA (7nm)
500.7nm@T>90%
656.3nm@T>94%T＞95%@486.1nm
T＞92%@495.9nm
T>85%@500.7nm
T>95%@656.3nm
Tavg>95%@830-870nmT≥88.89%@420nm
T≥95.74%@H-β 486nm
T≥95.51%@OIII 496nm
T≥91.53%@OIII 500.7nm
T≥83%@560nm
T≥87.46%@602nm
T≥99.17%@Ha 656.3nm
T≥98.63%@N-II 654nm
T≥99.18%@N-II 658nm
T≥97.74%@SII 672nmCut-off depthOD5T≤0.01%@350-400nm
T≤0.68%@Hg 435.8nm
T≤1.1%@Hg 546.1nm
T≤0.13%@Hg 577nm
T≤0.12%@Hg 578.1nm
T≤0.94%@Hg 589nm
T≤0.94%@Na 589.6nm
T≤0.7%@Na 615.4nm
T≤0.59%@Na 616.1nm
T≤0.06%@720-1100nm>OD4@350-400nm
>OD2@Hg 435.8nm
>OD1@Hg 546.1nm
>OD3@Hg 577nm
>OD3@Hg 578.1nm
>OD2@Hg 589nm
>OD2@Na 589.6nm
>OD2@Na 615.4nm
>OD2@Na 616.1nm
>OD4@720-1100nmShooting targetsEmission nebulaEmission + Reflection nebulaEmission + Reflection nebula + GalaxyApplicable occasionsCityCitySuburbsApplicable levelBortle8Bortle8Bortle6
Features:
1.Can be used to image most deep sky objects, including galaxies, reflection nebulae, emission nebula, and star clusters from a Bortle 1 location to Bortle 8.
2.Multi-Narrowband filter properly designed for astrophotography both in light polluted, allows for imaging in bright man-made light pollution and moonlit conditions.
3.Take color images without needing to combine images with multiple filters, most useful for One-Shot Color cameras.
4.High transmittance of the main emission lines Ha/OIII/H-Beta in the visible region enhances SNR and contrast.
5.Passing near-infrared region is for shooting deep sky objects that cannot be imaged with other filters without NIR transmission.
Details：
Blocking ≥OD4; the ability of this pollution filter for astrophotography in the city to isolate the light pollution band allows it to be used in BORTLE 1-8 urban; use this get clearer and higher contrast astrophotography in urban without going to remote places.
Multi-bandpass filters; without multiple filters' combination for colorful images; rich color in your lens.
Resistant of BORTLE 8; the multi-narrowband filters can be resistant from Bortle 1 to Bortle 8 cities; suitable for almost all urban.
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 image photoing.
High transmittance; the >90% transmittance in core wavelength of Ha; OIII; H-Beta; more objects for your astrophotography by using this multi-bandpass filter.
60+80 coatings; has coated with buffer layer; waterproof layer; adhesive layer; multi-layer system; etc; refined coating process makes the multi-narrowband filters improve the image signal-to-noise ratio and contrast while maintaining good color balance.
The multilayer coating design for the remarkable performance in tacking light pollution and high transmittance in core wavelength. Astrophotography in urban comfortable.
Near IR (NIR) is blocked up to 1100nm. High ability to process the wavelength from 300 to 1100nm. Effectively isolate the light pollution band.
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.
- 300-1100 mm working wavelength; the wider coverage of this multi-narrowband filter allows it to have a strong ability to tack light pollution.
- The wavelength of most galaxies, emission nebula and so on can be captured in a short time. Widely used and high efficiency.
- Multiple combinations; there are many combinations of the multi-narrowband filters and astrophotography systems; for example; F9381A+W9161A+W9184A+W9191A+F9198F
- Can meet the astrophotography needs of most galaxies, reflection nebulae, emission nebula, star clusters, etc.
Review of SV240
Let's have a look at what our client said. The following information was provided by Leo Yu and taken from Facebook, thanks for sharing:
NGC 891 the "Silver silver" Galaxy is about 32 million light years away - 4 hours of integrations from 1 night
"This photo at first glance may seem nothing special..... but it was actually taken in abysmal condition!
1) This is imaged from a very bright suburb.... bortle 8 some may say even bortle 9
2) It was a night with a quarter moon
3) ok ok you may think 1+2 was nothing unusual... the kicker is that this was through the thick smog from the wild fire smokes!.... see the weather forecast and actual satellite image of the smoke condition. and for DSO transparency is much more important than seeing.... and I would say the rating was BELOW poor.... polaris was barely visible with AVERTED vision.
How......? This is taken with the SVBONY new SV240 filter...... its a very interesting design.
If the Optolong L-eXtreme dual narrowband filter have a love child with a UHC filter and IR pass filter, you would get the SV240
instead of 7nm bandgap of a typical dual band filter
It has 24nm for the OIII, 20nm for Ha, and 115nm in NIR
The wider bandgap is a good compromise to be able to capture what would normally be broadband DSO but still be able to filter out most of the light pollutions.
It will still function as a dual narrow band filter on emission DSO, I will try to post some examples later. I tried it with the veil nebula before and it works great for HOO Of course it is not quite as good as the L-eXtreme, I would say the difference is about 80-90% there but that's expected with the wider band gap
Its a neat 3-in-1 able to image both broadband and narrowband....
What about the IR-pass portion? I have not been able to use that part as it is a function for camera with integrated guide sensor like the ASI2600mc DUO. where the guide camera is sensitive to IR and the IR pass portion help make guiding easier but I don't have a similar camera
Seem great for folks who are starting to get into filters but dont want to buy too many filters."
Some questions about SV240
Q: What is the difference with SVBONY SV220 mainstream dual narrowband astrophotography filters?
A: Dual narrowband filters are mainly used for emission nebulae, planetary nebula, and supernova remnants astrophotography. SV240 can be used for both traditional emission nebulae and galaxies, reflection nebulae, and star clusters.
Q: Which equipment can be used with SV240？
A: Because SV240 has high transmittance in the near-infrared region, we recommend NIR-enhanced sensors, such as the IMX585 and IMX464.
Q: Do these filters produce halos? What kind of primary mirror are recommended?
A: Using the infrared astrophotography filter will often cause halos in near-infrared; We recommend using SV240 with a reflective or APO refractor.
Q: Does the SV240 filter provide an improvement in photoing broadband galaxy targets?
A: Yes, SV240 can be seen as the combination of SV220 and UHC filters, and has remarkable performance both in narrowband and broadband targets.
BrandSVBONYTypeFilterModelSV240NameMulti-Narrowband FilterSize2-inchSubstrate Thickness2mmClear Aperture44mmWavelength Range300-1100nmFWHM24nm & 20nm & 115nmSurface Quality60/40Surface Parallelism1/4λThreadM48x0.75Single ThreadYesNet Weight12.5g / 0.44oz /0.027lbCountry/Region of ManufactureChinaShippingReturnPaymentGuaranteeContact usShipping
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