Hα 7 nm Filter - 1.25" - Ha7nm1.25
ZWO
From $129.00
4 stores
The ZWO Hα 7 nm Filter isolates hydrogen-alpha emission nebulae for stunning deep-sky narrowband astrophotography. This 1.25" mounted filter passes light at 656nm wavelength with a 7nm bandpass, making it ideal for high-contrast imaging of emission nebulae, planetary nebulae, and supernova remnants even in light-polluted skies. Fine-optically polished to 1/4 wave accuracy with multi-layer anti-reflection coatings, this narrowband filter achieves approximately 90% light transmission and is parfocal with other ZWO narrowband filters for Hubble Palette imaging.
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Specifications
| Bandpass | 7″ |
| Filter Size | 1.25 in |
| Weight | 0.2 lb |
| Optical Surface Accuracy | 1 |
| Center Wavelength | 656 |
| Light Transmission | 90% |
| Optical Length | 5.5 mm |
| Thread Type | M28.5 x 0.6 male |
| Glass Thickness | 1.9 mm |
| Total Thickness | 9 mm |