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SII 7nm Filter ZWO 36mm Circular Unmounted - ZWO
SII 7nm Filter ZWO 36mm Circular Unmounted - ZWO
SKU: zwo-zwsii7_36c
Available within 7 days
Regular price
€209,90 EUR
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"Sale Price"
€209,90 EUR
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The ZWO S-II 7nm 36mm narrowband filter is specially designed for astrophotography, optimizing observations at a wavelength of 672nm. Compatible with other filters such as H-Alpha and O-III, it allows for "Hubble-like" quality images by significantly improving contrast and removing the effects of urban lighting.
- Bandwidth: FWHM 7nm (+/-0.5)
- Transmission: 90% on the S-II line (672nm)
- Cut-off in the infrared (700/1100nm)
- High quality Schott glass
- Glass thickness: 1.85mm
- Precise optical polishing ensuring a wavefront accuracy of lambda/4
- Parallelism <30" arc on both surfaces
- Double-sided optical coating for anti-reflective treatment
- CNC machined aluminum cell construction
- Significantly improves the contrast of nebulae
- Reduces light interference from public lighting
- Compatible with CCD imaging systems and modified cameras for advanced astrophotography
- Eliminates unwanted wavelengths for sharper images
- Visual observation (countryside sky): Incompatible
- Visual observation (city sky): Incompatible
- Film photography: Incompatible
- CCD imaging: Excellent for enhancing nebula contrast
- Digital photography (unmodified camera): Good, although the sensitivity of unmodified sensors is reduced in SII
- Digital photography (modified camera): Excellent for enhancing nebula contrast
- Webcam/Video (planetary): Not applicable
- Webcam/Video (deep sky): Not applicable
