SV227 SII 5nm 2" Filter Narrowband Astronomical Photographic CCD Filter for Deep Sky
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Key Features
The SV227 SII 5nm filter enhances your astrophotography, capturing sharp and detailed images of emission nebulae in the sulfur II (SII) wavelength with minimal light pollution.
Featuring a 5nm bandwidth, this filter ensures exceptional narrowband transmission, offering excellent contrast and clarity for deep-sky imaging.
Made with premium optical glass, the SV227 filter ensures high transmission rates and precise color rendition, delivering vivid and accurate results in astrophotography.
Designed to withstand long exposure times and environmental conditions, the filter is built for reliable, long-term performance in the field of astrophotography.
This filter is designed to fit most 2-inch telescope eyepieces, providing versatility and ease of use for both amateur and professional astronomers.
Note: This OIII filter is NOT for use on the Sun, and is also unsuitable for telescopes with a focal ratio below f/4
SII Filter
SII Filter+2inch Holder
⚡ Shipped: 72 hrs after ordering (Pre-sale products excluded).
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Customer Reviews
Jakub
Aug 24, 2024
Filter does its job, I use it with imx492 sensor and get very decent results under bortle 7-8 sky
| Model | SV227 |
| Type | SII Filter |
| Size | 2-Inch |
| Wavelength Range | 300-1000nm |
| CWL | 672nm |
| FWHM | 5nm |
| Peak Transmittance | ≥90% |
| Substrate Thickness | 1.85mm |
| Blocking | ≥OD5 |
| Clear Aperture | 44mm |
| Surface Quality | 60/40 |
| Surface Pparallelism | 1/4λ |
| Parallelism | 30" |
| Thread | M48x0.75 |
| Single Thread | Yes |
| Net Weight | 12.5g / 0.44oz/0.027lb |
Features
- 1. SII CCD narrow band filter reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural)
- 2. 300-1000nm Wavelength Range; the SVBONY Sulfur II 5nm Extra Narrowband Filter transmits a 5nm bandwidth of light that is centered at 672nm
- 3. German imported glass; multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition
- 4. CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading
- 5. 1.25 inch mounted; metal filter cell threads directly into the 1.25 inch barrel of your telescope eyepiece
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