Baader AstroSolar Visual Solar Filter Film (ND 5) - Eco Size Piece 140x155mm (5.5x6.1") # 2459286


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  • Baader AstroSolar Safety Film with optical density 5.0 for white light solar viewing. Reduces intensity of Sunlight by a factor of 100,000 for safe solar observation or imaging with optical instruments.
  • Make your own front-mounted solar filter for finderscopes, telescopes, binoculars, spotting scopes, or photo/video camera lenses. Not for use with solar viewer cards or glasses for unmagnified views of the Sun. Instructions included.
  • With AstroSolar Film the Sun appears in its real color - neutral white (with a slight bluish tint). Other films and glass filters produce a blurry bluish or reddish/orange/yellow solar image which is not the natural color of the Sun!
  • Produces high resolution, high contrast images of the solar disk that are far superior to those provided by any other comparable white light solar filter materials.
  • Made in Germany by Baader Planetarium.


Baader Planetarium

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Baader Planetarium’s AstroSolar Safety Film 5.0 is a patented, specially manufactured blister free film that is only 0.01mm thick and attains the optical quality of plane-parallel glass filters. The base material is not “Mylar.” It reduces sunlight by a factor of over 100,000 to safe levels for visual or imaging/photographic applications with optical instruments. The film, made in Germany, is coated on both sides to ensure highly uniform filtering while neutralizing occasional microscopic holes in the coating. One layer of this film is sufficient for the construction of a safe, high-resolution solar instrument filter. Baader AstroSolar film is considered to be the “gold” standard for white-light solar observation by amateur astronomers. This film does not deteriorate the optical wavefront so it allows the use of high magnification with any optical instrument without reducing sharpness or contrast of the solar surface. Filters made with this film should ONLY be used in front of the telescope objective or camera lens. It is normal for the film to have some dents, streaks, slight warps, etc. and this does not indicate that the film is defective nor does it compromise the image quality in any way. Package includes one piece of film (140x155mm) and instructions for making your own DIY solar filter cell (examples of filters made by users are shown above). This AstroSolar Safety Film 5.0 is not authorized to be used for naked eye solar observation or production of solar viewers. For direct solar viewing without telescope, binocular or camera optics, consider Baader's EN ISO 12312-2:2015 certified Baader Solar Viewers equipped with AstroSolar Silver/Gold Film.

Product information Product Dimensions 5.71 x 6.5 x 0.08 inches Item Weight 0.704 ounces ASIN B072XPB9NS Item model number 2459286

This was smaller than I expected, but I guess that was my fault. I was sure I ordered a larger sheet, but when I got a 6" square and checked my order, that was apparently what I had ordered. :/
It's a bit of a pain to put it together into a box style filter you can place on top of your lens. You aren't supposed to touch it without gloves on as the oils on your finger can damage it. I looked through it at the sun and may have damaged my eye - it does say they don't recommend using it for your eyes, even though they've never heard of it causing a problem. So I'm telling you now - a few seconds looking through it did not blind me, but did leave my eye seeing 'off', even a couple weeks later. So DON'T LOOK THROUGH IT AT THE SUN as it isn't meant for that.

I was told at a Canon eclipse workshop that this film was not good because it's shiny on both sides and there is a risk of reflections between the film and lens glass, causing 'ghosting'. So I ordered what they recommended, a Seymour Solar filter. I've attached pictures of the sun through both - this Baader filter is the whiter one, the Seymour is yellow. They seem fairly equivalent in image clarity, and color can always be adjusted after the fact. The Baader was much cheaper, but then I went with a glass one in a nice aluminum mount from Seymour as I found the Baader film a pain.
Little did I know that the Seymour glass also has the ghosting risk, I would have had to use their film to avoid that. Sigh. (Bad vibes going towards Canon rep for the partial information.)

Evaluate for yourself. The pictures are taken with a Sony a6000 wearing a cheap Opteka 500mm lens (750mm FF equivalent due to the APS-C sensor)

I got this to use on my 5" reflector telescope. Obviously this wasn't big enough to cover the entire aperture so I had to make my own sleeve to put around the telescope made with poster board. It did reduce the aperture size by a bit, but honestly, that didn't pose any problem for me, and even then I still put on a moon filter to lower the brightness a bit more.

I really liked that it shows a more true color for the sun rather than the yellow that eclipse filters do. The film is too thin for my likes though and is really hard to handle and keep glued (it kept peeling off because the film is so thin and the sheet of manila tag it says to glue onto is too glossy to hold a proper grip. So I just went out and bought a sheet of poster board, cut a circle, and then a second one inside of it and used double-sided tape to stick the sheet onto the disc and then glued a sleeve to it so I could easily slide it off and on my telescope.

I also was able to see several large sunspots just by holding the sheet up to the sun (which they don't recommend since it doesn't fully block all the UV, but seeing how I wear glasses which are UV blocking as well, I figured looking for a few seconds wasn't too bad.) On the telescope it works perfectly fine, got to see some more smaller sunspots which weren't visible to the unaided eye.

But again, it's a bit pricey (I paid $29, and as of this review it's down to like $25) for the size, and it's just really, REALLY thin, mine got a few creases just by attaching so, be careful. But it sure beats paying $100 for 'telescope ready' filters.

This solar film worked really well for my Canon DSLR. I'm picky about the sharpness of my images, and I had no issues. Yes, you have to build something to hold the film in front of your lens, but that wasn't a big deal. What mattered most to me was getting a sharp image with a good white color (not the artificial yellow/orange).

I'd also recommend using a manual exposure. I had tested this with the sun on a bright day prior to the eclipse to work out an exposure that gave good detail on the sun (made sure the sun spots were clearly visible). I started with the exposure the camera recommended and then experimented from there.

Used it for the 2017 eclipse on a Konuspot 80. Worked great and I backed it with a Amazon UV filter just in case. The material is definitely easy to damage but once you build the cardboard part it is easy to handle and I got some great pictures with good detail even in the sun spots!

The AstroSolar Safety Film is a high quality material for making photographic solar filters, but I have to give it a "4-star" rating because it was very difficult to work with and came in such a small amount for the price. The instructions for making the DIY filter was only for over a lens on a DSLR or a spotting scope, but not for a point-and-shoot with an extendable lens housing. I had to come up with my own design for such a filter using the Safety Film, which was completely different and worked very well. The information included with the filter material was somewhat confusing about whether the Safety Film was safe to use as a visual filter; it referenced another product with the same number as the one I received.

Perfect!!! I was able to cut out a single sheet into three circles, two taped onto my binoculars, and one mounted onto a tube that fits into my camera lense, the sun appears a clean white, not yellow like the cheaper eclipse glasses we had, and with no noticeable distortion. So so so glad I bought this to help observe the solar eclipse and preserve it! Will definitely be buying another for our telescope!

Excellent quality as expected from this brand. Used to view the sun the same day through a 3” offset mask on my 8” Zhumell dobsonian. Clear, white disk vs. tinted or yellowed with cheaper filters. Ready for the Transit of Mercury on 11/11/19 if the weather corporates!

Good product overall, contains good instructions for constructing a solar filter. You can tell it's a higher quality filter than the ones used in eclipse glasses, the sun looks perfectly white through it. It's a little expensive, so unless you're using it for a telescope, it might not be worth the price. I made a pair of solar filters for my binoculars, and although they worked perfectly, 3 layers of those reflective safety blankets make surprisingly good solar filters at less than a tenth of the cost.

Excellent quality product, great for using to photograph an eclipse of the Sun

Was slightly disappointed with the size of actual filter paper as it stated 150 mm but didn’t cover all of my 130mm aperature.
Made a filter holder and cap out of cardboard envelope that it came in and works absolutely fine.
Just think a little to expensive for a tiny piece of paper but much cheaper than buying a purpose made one