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Baader AstroSolar A4 Solar Film

Baader AstroSolar A4 Solar Film

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 privide 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

Customer Reviews

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


  Fast Delivery  Amazing service, as the package arrived the next day after ordering. Very well packaged in a sturdy card envelope. Regarding the filter material, I have been using it for over 20 years and it is the only one I use on binoculars and telescopes.   (10/05/2019) SM - Southampton


    I ordered some BAADER ASTRO SOLAR SAFTY FILM [Visual] it is excellent quality. the delivery arrived the day after I placed the order   (28/04/2019) Frank Ascroft - wigan


  Speedy delivery  Well packaged and safely delivered. Speedy response to my email request about delivery. Product comes with excellent instructions for producing a filter.   (01/03/2019) Stephen - London Borough of Bexley


  Fast Delivery - Well protected  Very happy with the service - Arrived within 3 days of ordering and was well protected inside a Celestron magazine. I am intending to construct the filter and use it this weekend clouds permitting :0   (20/07/2018) MB - Chelmsford


  Fast Delivery  Arrived super quick and well protected by tucking into a Celestron catalogue - haven't used it yet as I am taking it to my holiday telescope and will make the filter there.   (13/07/2018) RS - Northampton


  very good filter   Arrived promptly after ordering from Harrison Telescopes. After reading the supplied instructions carefully and getting WWW advice I put together a good solar filter. Just waiting for cloud filter to arrive. 😉   (09/03/2018) ian - Dorset


  Excellent solar filter material   The Baader Astrosolar Safety Film is an excellent choice to make a white light solar filter for telescope imaging. Comes with good instructions and how to handle the filter medium. Produces good crisp images.   (03/11/2017) Bob Newman - Felixstowe


  Works well  I bought this to photograph the recent solar eclipse in the USA. It takes a little effort to make up into a filter but following the instructions was not difficult. The result was very good and I have fantastic pictures of the eclipse.   (31/08/2017) -


  Baader AstroSolar A4 Solar Film  Used this film before but this was the first time we used Harrison Telescopes. Good price, easy to order online and very fast delivery. Thank you and well done. Now, if you can arrange for a cloudless sky on Aug 21 in the US so we can really put the film through its paces, that would be superb!   (28/07/2017) Ann B - Leicester Forest East


  Baader AstroSolar A4 Solar Film  I have used Baader Solar Filters before on the last eclipse of the sun as seen from England. I find them very good value for money and a very safe way of observing the sun through a telescope. I have had one for many years and thought it was time to buy another. Excellent.   (21/07/2017) roger hlibkowycz - lincolnshire


  Best price around for this item  Received in double-quick time, well packed. Couldn't improve on this.   (21/07/2017) John Rowland - York


  Very prompt delivery and well packaged  This was delivered the next day and I was able to follow the instructions as well as referring to on line tutorials to create two solar filters for my camcorder to use in the US eclipse of August 2017   (09/07/2017) John - Warrington UK


  Easy To Use  This product is easy to use and was delivered promptly.   (29/06/2017) John - Bexley


  Fast delivery. Item good.  Fast delivery of Baader AstroSolar A4 Solar Film. For use with DIY filter for my Canon 70 -200mm f4 IS and 300mm f4 IS lenses. Quite easy to make filters if you're ok at DIY. Make sure that there are no holes for stray light if photographing the sun! Also don't stretch the fabric.   (02/06/2017) Walter Rowan - Scotland


  great value for money   I used this film before for solar eclipses and it is very good for amateur or professional Solar photography. Shipping was fast and item as described. Pity they run out of stock quickly.   (27/05/2017) -


  Excellent product , excellent price .  Arrived very quickly and very well packaged, The instructions supplied are very good enabling you to construct a solar filter for a telescope or binoculars etc in just a short period of time. Safety advice is also included .Images so far have been excellent, a beautiful white sun, worth every penny   (04/05/2017) S Thomas - West Midlands


Our standard delivery charge for most of the UK is £2.95. All orders are shipped promptly, lower value items are sent Royal Mail 1st class and higher value or larger goods are shipped via reputable courier. All goods are shipped fully insured with FEDEX, UPS, DPD and Royal Mail, we do not use budget courier services, please note we can only ship to UK mainland addresses. We are not able to ship to forwarding agents or PO boxes.

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We hold stock, dozens of telescopes and literally thousands of accessories that we ship out each business day, normally orders received before lunch are shipped that business day. We also direct ship from our UK suppliers, this means we have access to thousands of products that can ship fast to our customers.

Deliveries to UK mainland addresses are all shipped with fully insured premium services for £2.95, *some exceptions apply including many AB, FK, HS, IV, KA, KW, PA, PH, ZE postcodes. We will quote delivery charges to these areas where applicable prior to shipping (this does not normally affect lower value items shipped by Royal Mail).

You must inform us within one working day if the goods are lost or damaged in transit so that we can make a prompt claim against the delivery company and correct the problem. Please ensure all address details are accurate, we cannot be responsible for failed deliveries or losses arising from incorrect delivery addresses.

You agree that proof of delivery supplied by our delivery company is sufficient evidence to establish that goods have been received.

If your product is sent by Courier they will attempt delivery twice and a signature will be required. If they are unable to deliver because you are not available and after 5 days you have not contacted them to re-arrange. the goods will be returned to us and the return delivery costs may be charged to you

Baader AstroSolar A4 Solar Film

MPN: 2459281





Price: 18.00


Ideal for making solar filters for cameras binoculars and telescopes to view eclipses, transits and sunspots. Baader Planetarium AstroSolar film for solar observation with telescopes in an A4 20cm x 30cm sheet. It is made for the construction of high-quality objective-filters for observing the sun with telescopes, binoculars, camera or video-lenses. This foil is CE-tested and reduces the intensity of sunlight by 99.999% (neutral density 5.0).

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. Dont worry if you think that is only a small aperture, the Sun is very close and large, the hole will normally provide a far cleaner view than using the entire aperture. This is especially true of obstructed designs like reflectors and SCT's where the hole then provides clear unobstructed aperture which is better for contrast.

Full instructions on how to make a Solar filter are of course included.



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