Baader Planetarium AstroSolar Binocular Filter

Baader Planetarium AstroSolar Binocular Filter 70mm


Baader Planetarium AstroSolar Binocular Filter 70mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film.
Many ready made filters do stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely does destroy the image quality, rendering the film useless for high magnification work.

AstroSolar must be mounted entirely stress free in order to perform like a high precision planeoptical window. It sounds like a contradiction with traditional perception of quality, but AstroSolar must show slight ripples! Only when the film is being put under stress by an improper cell mount it performs just like any single side coated glass-filter made of untreated floatglass.

2 Pieces are required for binoculars!

Stock No: 2459327


  • Original Baader AstroSolar® Safety Film (OD 5.0), cell mounted and quality inspected by skilled members of our staff
  • Clear white IR-rejecting front ring with reinforcing raised edges along the outer and inner circumference, designed to protect the solar filter material from contact with any sharp metal edge
  • 3 injection moulded centring-bolts with threaded brass inserts to centre the filter-cell in front of the tube opening. These bolts come in three different diameters, depending on the filter category (ASTF/ASSF/ASBF). Each bolt features injection moulded rubber grip-faces, shaped to easily slide onto any telescope tube – but are very hard to come off
  • No tool mounting and adjustment of the centring bolts to fit a wide variety of mechanical tube diameters. Bolts made to contact the outside or optional (if appropriate) the inside of the optical instrument tube
  • Non-rotating sliding fasteners made from aluminum that hold the centring bolts. These metal sliders are equipped with a machined indicator to point towards the adjustment index
  • Additional Phillips screws are integrated into the sliding fasteners, so that the centring bolts can be firmly fastened with a screw driver if preferred by the user
  • Index scale provided beside each adjustment slot – adjacent to each sliding fastener, for fast and repeatable adjustment of the filter cell onto different telescope tubes
  • Black sliding washers supplied to securely cover the full length of the adjustment slots in the aluminum frame
  • For blocking sunlight from passing trough the filter cell beside the filter area
  • (Only for ASTF-filters) rubber plugs supplied as cover for closing unused adjustment slots in the aluminum frame
  • Three security straps included, to secure the position of the filter cell with Velcro-adhesive pads. A safety feature to absolutely ensure a secure fit in front of the telescope under any circumstances (gust of wind asf)
  • Warning text printed onto the front side of each filter cell: Read the Instructions before use
  • Cardboard gift box fit for safely shipping the filter

Baader Planetarium AstroSolar Filter Instruction Manual

Baader Planetarium AstroSolar Filter Clamping Range

AstroSolar Filter Compatibility list for Celestron Products


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