The Solar Continuum Filter is a narrow-band photosphere filter for solar observation in white light. It ensures maximum contrast when observing the photosphere.
Lens systems – including those of apochromats, catadioptrics and eyepieces – are traditionally optimised for the range around 540 nm, as this is where our eyes are most sensitive. This filter therefore narrowly cuts out the spectral range in which a lens optic produces the sharpest and most contrast-rich images. The effect is greatest with achromatic lens telescopes, but it is also noticeable with apochromatic telescopes, catadioptric systems and even pure mirror systems due to the reduction in air turbulence.
As a monochrome filter, it is ideal for use with monochrome cameras and can even bring enormous benefits to colour-pure systems.
Compared to the previous model with a half-width of 10 nm, this filter has a half-width of only 7.5 nm, which significantly increases the contrast.
Baader's CMOS-optimised filters are characterised by:
- increased contrast
- narrower half-widths (FWHM)
- Reflex Blocker™ coatings for maximum insensitivity to retro reflection from nearby 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 utmost care taken to ensure homofocality
- Blackened edges all around, with filter front indicator in the form of a black outer edge on the front to additionally prevent any reflection from light falling on the filter edge
- Each filter is individually precision-polished and coated, with a sealed coating edge (NOT cut from a larger plate with exposed coating edges)
- Life-Coat™: even harder coatings to enable an age-resistant coating with an unlimited service life – even in the most adverse environments
This new CMOS-optimised filter generation is designed to become the new standard in amateur astronomy.
Please note: This filter is not a solar filter and is only suitable for observing the sun in combination with a solar filter.
