The Baader Solar Continuum 7.5nm 2" 540nm is a specialized narrowband filter designed to improve contrast in monochromatic astrophotography and visual observations.

The Baader Solar Continuum filter's passband ranges from 535 to 545 nm with a maximum at 540 nm. It is this wavelength that is the reference point by which the optical systems of most telescopes available on the market are optimized. Thanks to the effective cut-out of the remaining spectral range and a very good match to the characteristics of CMOS sensors, the Baader Solar Continuum 7.5 nm 2" 540 nm filter allows you to achieve the highest possible level of contrast and detail.

The best results are obtained when using the filter with achromatic telescopes, which, however, does not preclude its use with apochromats or catadioptric and mirror instruments.

Attention! The Baader Solar Continuum 7.5 nm 2" 540 nm filter is not eye protection for visual observations of the Sun. Solar observations require the use of dedicated accessories, such as Herschel's wedge, dedicated solar foils, etc.

Baader Solar Continuum Filter Key Features 7.5nm 2" 540nm

• narrowband filter with optical characteristics optimized for use with CMOS cameras
• Reflex-Bloker™ anti-reflective coating effectively eliminates the halo effect
• precise workmanship guaranteeing the same thickness of the filter at every point
• darkened edges of the filter to prevent internal light reflections

Technical parameters

• filter type: bandpass filter
• Filter diameter: 2"
• filter thickness: 2 mm
• filter shape: round
• bands passed: 535 - 545 nm
• location of the peak of transmittance (CWL): 540 nm
• half bandwidth (FWHM): 7.5 nm
• maximum transmission: >90%
• anti-reflective coating: Reflex-Bloker™
• surface finish: surface polishing
• frame thickness: 6 mm
• thread: M48

Set elements

• Baader Solar Continuum 7.5nm 2" 540nm filter

Guarantee

24 months