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SII Filter 7nm ZWO 36mm Circular Non-Mounted - ZWO
SII Filter 7nm ZWO 36mm Circular Non-Mounted - ZWO
SKU: zwo-zwsii7_36c
Available within 7 days
Regular price
€192,90 EUR
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€192,90 EUR
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The ZWO S-II 7nm narrowband filter of 36mm 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 enhancing contrast and eliminating the effects of urban lighting.
- Bandwidth: FWHM 7nm (+/-0.5)
- Transmission: 90% on the S-II line (672nm)
- Cutoff 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-reflection treatment
- CNC machined aluminum cell construction
- Significantly enhances the contrast of nebulae
- Reduces light interference from street lighting
- Compatible with CCD imaging systems and modified cameras for advanced astrophotography
- Eliminates unwanted wavelengths for sharper images
- Visual observation (rural sky): Incompatible
- Visual observation (urban 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): No interest
- Webcam/Video (deep sky): No interest
