Optical Accessories

The Baader Solar Continuum Filter is practically a narrowband photosphere filter for solar observation in white light and provides the highest contrast.

• Baader 7.5 nm Solar Continuum Filter, CWL 540 nm, in cell with 1.25" screw-in thread
• A must for owners of achromatic refractors. This narrowband-filter cuts the spectral range where lens optics draw sharpest and contrastiest. The Solar Continuum Filter brings power back to you.
• Enhances contrast and reduces the effect of atmospheric turbulence (in combination with white light solar filters)
• Enormous contrast gain in monochrome photography even on pure color systems - see second and third image
• Important note: The Solar Continuum Filter must be used for purely VISUAL solar observation ONLY with additional filtering (e.g. Baader Herschel prism or AstroSolar Safety Filml)

The filter reflects heat radiation and is designed for small refractors and camera lenses. It is necessary for H-alpha and calcium solar photography.

• 2" filter thread with M48x0.75 external thread - low profile mount
• Suitable for use in front of the H-alpha or calcium attachment for refractors up to 100mm aperture
• Suitable for small camera lenses or refractors in front of the lens
• 25 nm transmission in the H-alpha and calcium range - Transmission 90
• Min. 1/4 lambda accuracy - plane-parallel discs in high quality cell

The Baader Solar Continuum Filter is practically a narrowband photosphere filter for solar observation in white light and provides the highest contrast.

• Baader 7.5 nm Solar Continuum Filter, CWL 540 nm, in cell with 2" screw-in thread
• A must for owners of achromatic refractors. This narrowband-filter cuts the spectral range where lens optics draw sharpest and contrastiest. The Solar Continuum Filter brings power back to you.
• Enhances contrast and reduces the effect of atmospheric turbulence (in combination with white light solar filters)
• Enormous contrast gain in monochrome photography even on pure color systems- see second and third image
• Important note: The Solar Continuum Filter must be used for purely VISUAL solar observation ONLY with additional filtering (e.g. Baader Herschel prism or AstroSolar Safety Filml)

The photographic filter increases contrast on the solar surface in the calcium and H-alpha ranges.

• Telescope side connection is 1.25" and 2".
• Camera side connection is 2" with ring clamp
• The filter has a wider transmission in the calcium and H-alpha ranges
• Enhances the contrast of sunspots, granulation and details on the edge of the "solar disk
• Ideal for use with a Herschel prism
• Not intended for visual observation

The photographic filter provides high contrast solar images in the calcium light around 393.3 nm.

• The filter is for photography only, not for visual observation of the sun.
• Housed in a 1.25" low profile filter cell
• Transmittance at 393.3nm - FWHM is 3nm
• Ideal for use with photographic objective solar filters, Herschel prisms or other solar prisms

The photographic filter is designed for solar photography in calcium light.

• Telescope side connection is 1.25" and 2".
• Camera side mount is 2" with ring clamp
• Transmission at 393.3nm - FWHM is 3nm
• Maximises contrast of sunspots, granulation and faculae on the solar surface
• Ideal for use with a Herschel prism
• The filter is not intended for visual viewing

• Diameter (mm): 100
• Thickness (mm): 12mm
• Surface shape: L/4
• Centre wavelength (nm): 656.28
• Bandwidth (nm): 60
• Peak transmittance (%): 95%
• Cut-off range (nm): 200nm-1100nm