Baader AstroSolar A4 Solar Film

Further details

Baader solar film in A4 size for making solar filters for cameras, binoculars or telescopes, it can be cut to size and provides a high quality image in true colour, supplied with full instructions.

Baader Planetariums AstroSolarTM safety film is a specially manufactured streak- and blister free foil. It attains the optical performance of planeparallel glass filters. The base material is not "Mylar"!. The basic development of this film was made in laboratories for nuclear- and particle physics.

Many telescopes have a "plug" normally around 50mm diameter on the lens cover that makes an ideal place to use the Solar film, then the original cap can be used as a solar filter holder. This is often found on refractors and reflectors and the 50mm or so aperture is more than enough to provide plenty of resolution and detail.

A New Standard in Solar Filters (review in Sky & Telescope)
High density coatings on both sides of the foil ensures a highly uniform filtering, while neutralizing the occasional miscroscopic holes in the coating. The image of the sun is extremely contrasty and of almost neutral colour.

Optical quality:
This highest precision film consistently produces strehl ratios of 94 to 96 percent at interferometric tests - thus it performs optically like a Fluorite Triplet Lens by Carl Zeiss or Astro Physics Triplet.

What is even more important - with AstroSolar the Sun appears in it' s real colour - neutral white. Other films and most glass filters produce a blurry bluish or reddish Solar image, thereby cutting part of the spectrum. Especially with an orange sun, it is very hard to see faculae regions which are visible predominantly in the blue wing of the spectrum.

Due to it's neutral colour balance, AstroSolar enables the use of various colour (or interference) filters which allows the observer to concentrate on certain spectral passbands for investigations of different layers within the solar "atmosphere".

Eye safety:
AstroSolar is essentially free from pinholes, since - other than with even the most expensive glass filters - it is coated on both sides, so that the chance of two pinholes overlapping each other is extremely faint. Pinholes do appear, but to 1 out of 10000 only in optical density 2.5! Baader AstroSolar safety film has been approved for eye safety by the National Bureau of Standards in Germany, the PTB. Unlike any other Solar Filter on the market, AstroSolar is CE-tested according to EG-Norm 89/686 and EN 169/92 ( notified body 0196). All processes connected to this product have been thoroughly tested. Coatings are inspected constantly for consistency to ensure your eye safety!

Supplied with instructions in single A4 size sheet and can be trimmed with scissors to fit

Delivery charge £5.95

Reviews

  Good service and product  The AstroSolar film 5.0 arrived promptly with instructions and pictures for a DIY filter. I made one for my camera and am very pleased with the results. The photos showed the sunspots clearly.  (25/04/2025) Karen - Plymouth

  Good service  Speedy service. My old solar filter got damaged with a slight tear. Unuseable. I now have another in time for summer viewing. I especially like the fact that I am using a local supplier.  (20/04/2025) - Letham, Forfar

  BAADER AstroSolar Safety Film (A4 size)  Excellent service. Prompt dispatch and well packaged. Following all recommended film handling instructions, I used the film in a 3D printed lens hood on a Canon 400mm lens & x2 convertor, to produce sharp white images of our sun.  (12/08/2024) -

  baader AstroSolar A4 Solar Film  Well packaged and easy to cut with maximum protection provided. This assumes that the detailed instructions contained in leaflet is adhered to. Tried out on a small telescope and the details of a (white) Sun were amazing. Good product.  (14/04/2024) Carl - Hampshire

  Great Service   Purchased to create a filter for my camera lens ready for the solar eclipse. Easy ordering and prompt dispatch..  (24/03/2024) Steve -

  Prompt delivery  Arrived promptly. Product as described.  (26/02/2024) -

    Does what it says on the tin. Made 2 solar filters, one for150mm Newtonian & one for Spotting scope.  (06/11/2022) Pete - Southport

  Does the job, fantastic  Well packaged securely so it does not fold. Protective layers make it easy to cut.  (21/08/2022) -

  Excellent  Very happy with the prompt despatch of my order - I think it was about fifteen minutes between the email acknowledgement of my order and the email telling me it had been despatched! The price was also competitive.  (17/07/2022) Chris Hooker - Oxfordshire

  Great for making a filters for telescopes and lens    (02/05/2022) -

  Excellent product  Received quickly and safely. It was recommended to me - does a great job.  (31/01/2022) Peter - Southampton

  Great Solar Film  This film works great. I sandwiched it between two UV filters then just screwed it onto my Nikon P950. Now I have an excellent and permanent solar filter at a fraction of the cost of an official one. Can see Sunspots clearly. Excellent.   (24/01/2022) -

  Baader solar film  Speedy service, excellent product for big binoculars  (29/08/2021) Anthony Meadows - Woodford halse

  High quality but be careful  High quality and works brilliantly. Read and understand the instructions beforehand, but it didn’t take long to make filters for all of my optics with foil left over. Be careful of the protective paper slipping whilst preparing the foil and take the time to make sure it’s perfectly flat.  (12/07/2021) Tobias B. - Chesterfield, UK

  Excellent Service and Item from Harrison  Harrison Telescopes answered my emailed query really quickly and the Baader AstroSolar Film arrived the following morning. After testing different sized apertures, the best result was when I used most of the film on a cardboard mount with a 7" hole to cover the top of my 8" reflector.  (14/06/2021) Matthew Cannavan - West Bromwich

  Great Solar Film   Ordered to get images of the partial eclipse. Arrived quickly and worked perfectly in making some solar filters.  (13/06/2021) -

  Just the job for taking images of sun  I had known there was going to be a partial eclipse visible in uk and wanted to do something more than the pin hole camera. This film was just the job. with cardboard pva and a pair of scissors I was quickly able to knock up a filter that went on my lcamera - with most of the sheet spare!  (13/06/2021) Keith - Sussex

  Reliable service   Ordered to make a solar filter the upcoming partial eclipse. Was a bit concerned it would arrive in time but received within 48 hrs! Solar film was packaged as expected in a rigid envelope to stop damage in transit. If only Harrison’s could deliver clear skies on the 10th June! Filter at the ready!  (06/06/2021) Jason - South Wales

  BAADER ASTROSOLAR A4 SOLAR FILM  Bought to make a home made sun filter works great can see the sun spots ,easy to use recommended. Fast delivery .  (30/05/2021) Phillip - Horbury ,West Yorks

  Product and service - excellent   This film is high quality and consistent across its surface. Unfortunately the first one I received had a pinhole in it. A replacement arrived the next day with no quibble - excellent service.  (19/04/2021) DNK - Hampshire

  Perfect for the job  High quality product, prompt delivery.  (07/03/2021) Jim - Southampton

  Solar Film  Film was delivered quickly, despite the current CV19 restrictions. It was fairly easy to work with, just read and understand the instruction first. Static electricity can be a problem as the film is very thin. I used artists card, the sort they use to paint a watercolour, for the mount.  (05/07/2020) Mike - South Wales

  Solar filter  I was a bit sceptical about making my own solar filter with this film but it was very easy and works perfectly.  (09/05/2020) Mark - Nuneaton

  Ideal for binoculars  I could not find a pair of solar filters for my 70mm binoculars, this product was perfect, a bit fiddly to make but views are great   (21/10/2019) paul w - Exeter

  Excellent sun filter  Good quality film for solar viewing, works perfectly.   (05/07/2019) Claire Cleaver - Birmingham