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H-Alpha Filter 7nm ZWO 31mm Circular Unmounted - ZWO
H-Alpha Filter 7nm ZWO 31mm Circular Unmounted - ZWO
SKU: zwo-zwha7_31c
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€195,90 EUR
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€195,90 EUR
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The ZWO 7nm H-Alpha narrowband filter, with a 31mm diameter, is specifically designed for astrophotography focusing on a wavelength of 656nm. Ideal for capturing sharp images of nebulae and other celestial objects emitting in H-Alpha, this filter significantly enhances contrast while reducing light interference from sources such as streetlights and the Moon.
- Bandwidth (FWHM): 7nm (+/-0.5)
- Central wavelength: 656nm (H-Alpha)
- CNC machined aluminum cell
- Available in 4 sizes: 31.7mm, 50.8mm, 31mm, 36mm unmounted circular
- Schott glass with double-sided anti-reflective coating
- Glass thickness: 1.85mm
- Precise optical polishing ensuring a wavefront of lambda/4
- Parallelism <30" arc on both surfaces
- Enhances contrast of H-Alpha nebulae
- Reduces the effects of streetlights and Moon
- Increases clarity of celestial objects emitting in H-Alpha
- Facilitates the capturing of 'Hubble-like' images in combination with O-III and S-II filters
- Minimizes the intensity and number of bright stars in the image field
- Compatible with CCD imaging systems
- Ideal for digital photography with modified camera
- Not compatible with visual observation and webcams
- 7nm H-Alpha 31mm unmounted circular filter
- CNC machined aluminum cell
- Mounting accessories (if applicable)
