Filtre S-II 7nm ZWO 36mm ringikülgus ei monteeritud põranda peale

The ZWO S-II 7nm narrowband filter is specifically designed for astrophotography and focuses on a wavelength of 672nm. It can be used in combination with H-Alpha and O-III filters to produce "Hubble-like" images.

With its FWHM (full width at half maximum) of 7nm, this filter allows for high contrast compared to the sky background, on many emission nebulae, planetary or supernova remnants. The aluminum cell is manufactured by CNC machines that impose great precision in manufacturing.

Technical Characteristics

• Wavelength: 672nm
• FWMH (full width at half maximum): 7nm (+/-0.5)
• Infrared cutoff: 700/1100nm
• Schott glass
• Thickness of the glass: 1.85mm
• Precision optical polishing to ensure a precise wavefront at lambda/4 and parallelism <30" of arc on both surfaces
• Double-sided optical coating
• Anti-reflection treatment
• Construction of the aluminum cell machined by CNC

Compatibility

This filter is compatible with digital photography (unmodified and modified cameras) and CCD imaging. It is not recommended for visual observation, film photography or webcams/videos.