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Solar Observation > Solar Filters > Foils & Glasses > Baader > AstroSolar > Baader Sun filter foil 20 x 29 cm
( 5 / 5 )
Product no.: 2718

Sun filter foil 20 x 29 cm

$ 31.90 incl. VAT, plus shipping costs
in stock
ready for shipping in 24 h + lead time
Express shipment possible for delivery the day after tomorrow, 30.05.2024!

Product description

More about the series AstroSolar...

Please note: This product is currently not available in the US.

It's always very pleasant to observe the Sun, not only during solar eclipses. The number of sunspots changes permanently, as well as their shape and size. Depending on magnification, you may even be able to discern the core and boundary areas of a sunspot (umbra and penumbra). The one essential condition for any solar observation is to reduce the sunlight to under 1/100.000 of its normal brightness, which is a no risk amount for the eyes. The Astro-Solar sun filter foil meets that standard. Simply fitted to the front of the telescope tube, this foil doesn't fall short of pricey plane-parallel glass filters in any way. The coating is subjected to permanent quality control. The multiple metal coating of the foil produces a remarkably even filter effect.

Technical data:

  • film size: 20 x 29 cm
  • filter efficiency: 99.999 % (ND = 5.0)
  • film thickness: 0.012 mm
  • absolutely clear and bubble-free substrate (non-Mylar)
  • instrument requirements: for telescopes, binoculars, spotting scopes and eyeepieces of up to 152mm aperture
  • quality mark: CE
  • Included in delivery: 1 A4 size sheet, incl. instructions, in PE sleeve

Our expert comment:

AstroSolar solar filter foil can be used to make your own filter attachment. The producers of the foil also make ready-made filters for different sizes of aperture and for different instruments:

(Stefan Taube)



Length (cm)
Width (cm)
Solar Filters
Type of build
white light

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*All prices include VAT plus shipping costs.

Baader Sun filter foil 20 x 29 cm

Customer reviews

A neccessary accessory

Review by R. K. on 09.03.2014 14:46:40

( 5 / 5 )

This foil truly does what it promises. It provides a clear view of the Sun, in which the Sun is white/yellowish and the sky adjacent to it is black.
Already on my first observation at 20x magnification I could see a spot. Bringing it up to 50x revealed the spot consisting of two smaller spots. When your eye accommodates to observing, finer aggregations of spots can be seen.
I recommend this foil to anyone because it gives your scope more functionality.

P.S. The foil actually does not look as bad as it seems on the picture above. It is really a silvery clean sheet.

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