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Silver metal cell holding 160mm white-light solar filter film with safety straps and mounting hardware

Baader Planetarium

Baader Planetarium 160mm AstroSolar BDSF 3.8 White-Light Digital Solar Filter

SKU CH-6FP8-3FMEW

A 160mm white-light solar filter with OD 3.8 AstroSolar film for safe digital imaging of the sun through telescopes up to 250mm aperture

  • High-contrast white-light views reveal intricate solar details
  • Optimised for digital imaging with short exposure times
  • Secure fit via screws, washers, centring bolts and safety straps
  • Stress-free film mounting preserves optical flatness
  • Fits telescopes up to 250 mm aperture

160mm AstroSolar White-Light Digital Solar Filter

This 160mm filter is built for astronomers and astrophotographers who want to observe and image the sun in white light. It uses Baader AstroSolar PHOTO Film OD 3.8 to deliver high-contrast views of solar surface details. The filter fits telescopes with a 250mm outer diameter. It is a precision optical component for solar observation.

Safety mounting kit and stress-free film holder

The package includes screws, washers, centering bolts, rubber plugs and safety straps for a secure, reliable fit on the telescope. The filter cell is engineered to hold the film stress-free, preserving its integrity as a high-precision plane optical window. This design prevents the image degradation caused by stretching film taut. Slight ripples may appear as a hallmark of this stress-free mounting.

Digital imaging optimisation and exposure headroom

The OD 3.8 film is designed for digital videography and lucky imaging techniques, allowing the shortest exposure times to freeze atmospheric turbulence. It comfortably handles high-resolution solar capture with sharp detail. It is not suited for visual observation without additional attenuation. Buyers needing a filter for eyepiece viewing or narrower bandwidths should look elsewhere.

Highlights

  • High-contrast white-light views reveal intricate solar details
  • Optimised for digital imaging with short exposure times
  • Secure fit via screws, washers, centring bolts and safety straps
  • Stress-free film mounting preserves optical flatness
  • Fits telescopes up to 250 mm aperture

Specifications

No published specifications for this item yet.

Questions about this item

How often should the AstroSolar PHOTO Film OD 3.8 be replaced?

The film is mounted stress-free to maintain optical precision and does not have a scheduled replacement interval; inspect it before each session for scratches, punctures or delamination and replace only if damage is found.

What limits image quality during a long imaging run?

The optical density 3.8 film is optimised for short exposures that freeze atmospheric turbulence, so the practical limit is seeing conditions rather than the filter itself.

Does the 250 mm filter cell get hot during all-day solar imaging?

The white-light film reflects most solar energy, so the cell stays near ambient temperature and no active cooling is required during extended use.

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