SVBONY SV227 Telescope Filter, 2 inches H-Alpha 5nm Filter
SVBONY SV227 Telescope Filter, 2 inches H-Alpha 5nm Filter Narrowband Astronomical Photographic CCD Filter for Deep Sky Photography
- SVBNOY H-Alpha 5nm 2" Filter blocks the transmission of contrast-killing light pollution wavelengths; improve contrast and detail
- This H-Alpha filter also blocks infrared wavelengths from 700nm to 1000nm so you don't need a separate IR-Cut filter
- Allowing 5nm bandwidth of light centered on a wavelength of 656.3nm to pass through; 90% transmission
- Astrophotography under a light-polluted night sky can be difficult; the solution is an H-alpha filter; the H-alpha cut-off filter works to filter out a large part of this light pollution
- 2 inch mounted; the filter can thread directly into the 2 inch barrel of your telescope eyepiece
| SKU: | B0D1G3L857 |
| Weight: | 2.12 ounces |
| Dimensions: | 2.9 x 2.9 x 0.04 inches |
| Model: | FCAW9187DB |
| Manufacture: | SVBONY |
| Origin: | China |
Product Description
Product Description
The clear focus range becomes wider when the optical density becomes larger.
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The SV227 filter is compatible with telescopes for astronomical photography
Standard M48x0.75 thread interface adapts to most devices
Specifications
| Brand | SVBONY |
| Model | SV227 |
| Size | 3.2-Inch |
| Substrate Thickness | 1.80mm |
| Clear Aperture | 44mm |
| Wavelength Range | 300-1000nm |
| CWL | 656.3nm |
| FWHM | 7nm |
| Blocking | ≥OD5 |
| Peak transmittance | ≥90% |
| Surface Quality | 60/40 |
| Surface parallelism | 1/4λ |
| Thread | M48x0.75 |
| Net Weight | 15.12.5g / 0.44oz /0.027lb |