Description: The SVBONY 7nm dual band filter is designed to drastically reduce the effect of light pollution. The 7nm bandwidth means it strongly isolates the nebulae's emissions into H-Alpha (red) and OIII (green-blue) from anything else. It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high- and low-pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our atmosphere. Features:1.Allows for imaging in bright man-made light pollution and moonlit conditions2.Take color images without needing to combine images with multiple filters3.Most useful for One-Shot Color cameras4.Useful for imaging emission nebulae, planetary nebulae and supernova remnants5.High transmission and sharp cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects6.Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow7.The duo-band narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun8.Be aware that the SV220 is not a great fit for fast telescopes, some users reported that the Duo-Band OSC Filter paired with the RASA caused band shift, thus clipping the HA data. Dual Narrow bandwidth H-Alpha/O-III 7nm narrowband filter properly designed for astrophotography both in light polluted. about svbony
Price: 99.99 USD
Location: ShenZhen
End Time: 2024-01-03T09:18:02.000Z
Shipping Cost: 0 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
Compatible Brand: For SVBONY
Size: 1.25 in
Item Diameter: 1.25 in
Blocking: >OD5
Maximum Magnification: 60x
Clear Aperture: 26mm
Substrate Thickness: 1.85mm
Single Thread: Yes
Name: Duo-Band OSC Filter
Thread: M28.5*0.6
Brand: SVBONY
Surface Quality: 60/40
Type: Nebular
FWHM: OIII (7nm) & HA (7nm)
Model: SV220
Peak transmittance: 500.7nm@T>90%; 656.3nm@T>94%
Net Weight: 7g
Surface parallelism: 1/4λ
Wavelength Range: 300-1100nm
