SV227 H-Alpha 5nm Filter 2" Narrowband Astronomical Photographic CCD for Deep Sky
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Key Features
The SV227 H-Alpha 5nm filter captures the hydrogen-alpha wavelength with exceptional clarity, ideal for imaging emission nebulae and other deep-sky objects.
Featuring a 5nm bandwidth, this filter provides high contrast and sharp images, ensuring accurate and vivid results in narrowband astrophotography.
Made with high-quality optical glass, the filter ensures maximum light transmission and minimal light loss, delivering clear, detailed astrophotography images
Built to withstand long exposure times, the SV227 H-Alpha filter is designed for consistent, reliable performance, even under demanding astrophotography conditions.
This filter fits most 2-inch telescope eyepieces, providing versatile and easy-to-use compatibility for both amateur and professional astrophotographers.
Note: This OIII filter is NOT for use on the Sun, and also unsuitable for telescopes with a focal ratio below f/4
H-Alpha Filter
H-Alpha Filter+2-inch Holder
⚡ Shipped: 72 hrs after ordering (Pre-sale products excluded).
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| Model | SV227 |
| Type | H-Alpha Filter |
| Size | 2-Inch |
| Wavelength Range | 300-1000nm |
| CWL | 656.3nm |
| 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. H-Alpha 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 656.3nm;
- 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. 2 inch mounted; metal filter cell threads directly into the 2 inch barrel of your telescope eyepiece.
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