Filtro H-Beta CMOS Narrowband 1,25"

Shortly:

• Hard-tempered and optically polished
• Blackened edges
• Optimized for modern CMOS cameras

H-Beta Filter: This narrow-band nebula filter allows light with a wavelength of 486 nanometers to pass through.

Line filter with a FWHM of 5.5 , recommended for optical systems with an aperture ratio of f/15 to f/1.8.

The CMOS-optimized filters from Baader are characterized by:

• increased contrast
• narrower full widths at half maximum (FWHM)
• Reflex-Blocker™ coatings for the greatest possible insensitivity to retro-reflection from the nearest auxiliary optics, even under the most adverse conditions
• FWHM carefully designed for each filter category to enable 1:1:1 exposures, matched to typical CMOS quantum efficiency and signal-to-noise ratio
• Identical filter thickness to existing standards, with the greatest care regarding homofocality
• Blackened edges all around, with filter front indicator in the form of a black outer edge on the front to additionally avoid any reflection from light falling on the filter edge
• each filter individually optically polished and coated, with sealed coating edge (NOT cut out of a larger plate with the coating edges exposed as a result)
• Life-Coat™ : even harder coatings to enable an aging-resistant coating over an unlimited service life - even in the most adverse environments

This new generation of CMOS-optimized filters is designed to become the new standard in amateur astronomy.