I used this film to make some filters to fit my binoculars. I bought some threaed filter ring adaptors and cut and glues the filter using rubber cement. Worked perfect. Drove and watched a total eclipse for the first time. So cool to experence.

Seems to work well. The sun light is adequately reduced in the telescope. Had some trouble working with the thin Mylar sheet though.... not as smooth of a job as I would have liked, but works fine.

I used Thousand Oaks film for the 2017 total eclipse and the 2023 annular. Great stuff at a good price.

nice sheet of material which can be cut and taped on filter holders for my cameras. The filter does a good job of filtering sun's energy to a point it can be comfortably viewed by eyes. The sun appears to be an orange orb which is normal. If you're going to take photographs of the sun, use this filter and put the camera on a tripod. to get the sun pics. Exposing for the sun through the filter, everything but the sun will be very dark, almost blacked out. If you want some of the surrounding landscape for context, keep your camera on the tripod, then wait for the sun to move out of frame, take a few pictures exposed properly for the landscape and then stack all of your photos as an HDR image in your favorite photo editing software.

It's the real deal, made in the USA. This stuff was more valuable than gold in the days before the GAE and everybody wanted it.I tested it against various high-brightness sources such as high intensity 5W LED flashlights, and a 100mW 395nm UV laser. You could see the LED die structure in great detail with the minimal amount of light that would pass. This filter material would be perfect for inspecting LED die structures or as a means of taking low intensity measurements for quality control. The UV laser would not pass through the filter at near 100%. Only the occasional photon or two would pass when moving the laser at different angles, due to what I think is scattering. I tested some of the recalled solar viewing glasses from China and found that there was varying degrees of UV light passage in about 30% of my sample. Please, folks, don't do this kind of testing with your eyes and instead use a camera as a sensor.I made various camera filters out of the filter film by carefully tracing the glass element of a disassembled UV filter and then reassembling the filter with the film behind the glass. Even my besting cutting skills weren't enough to prevent imperfection around the edges, and that is why I put it on the backside. The compression of the glass ensured the filter film was against the back inside edge of the black anodized aluminum UV filter assembly and prevented any light bleed. Ideally, laser cutting these would be better.For personal viewing with my 20-100 x 70mm monster binoculars, I crafted two identical cardboard tube rings around the outside edge of the objective lenses with a few wraps of coiled 2" wide card stock cut from cereal boxes and then a few wraps of tape to hold them together. I then put strong double-sided tape around the outside of the tube rings. The filter film was cut into 3/4" oversized circles using appropriately sized round plastic food containers as a template. I then set the binoculars upright with these card stock ring sleeves and centered them over the pre-cut circular filter films. With everything aligned and pressed against the filter film and a cutting surface, I cut outward radial slits into the film "over-sized area" around the peripheral of the card stock rings at 1/2" intervals. This allows one to fold these "flaps" of film onto the sides of the tubes and double sided tape, to tape everything together. A few more layers of silvered Mylar tape were wrapped around these flaps to seal everything up.Complete totality was observed from Franklin, MO, which is on the center line of totality for the GAE and provided us 2m 39s of viewing. The local weather conditions were slightly hazy, and so we were able to make out detail on the surface of the moon due to the slight dimming of the Corona. It was the most amazing astronomical convergence I've ever seen. If you missed it, you really missed it.

The filter operated exactly as advertised, and provided us with a good, safe view of the sun before during and after the August eclipse.The sheet size was plenty large to make three 58 mm lens filter, a 4" lens filter, 6 cell phone lens filters, and 6" lens filter.The sheet was easy to mark up and cut out the various filters, and the filter did not tear, rip, loose any of the silvering under our handling of it.We used a 3D printer to make slide-on rings for the 58 mm camera lenses and used super glue to attach the filter material to the rings--this combo worked very well. We used rubber bands to hold the larger filters on our telescopes. The filter material with the rubber bands was not perfectly flat, but as Thousands Oaks stated on the product description, these warps in the filter material did not impact the quality of the images.Three cheers for Thousand Oaks Optical and their quality products!

Purchased the larger size in order to make multiple filters - 1 for my 8 inch dob and another fir my digital camera. Has worked great so far. When viewing through dob, have not noticed any image degradation. Slight softness noted in image on digital camera when zoomed in fully on a 30", but yields great result if using an 800 mm or larger lens where minimal cropping will be needed.

It takes little effort to make perfectly serviceable filters for solar viewing, and the color rendition when using this film is a pleasant orange-yellow. It seems expensive but goes farther than you think. A 10"x10" sheet will easily make four or more DSLR lens-sized filters, with probably more material left over for a small phone lens cover and a couple of quick DIY pairs of eclipse glasses.

普通に使えています。欲を言うと、コスパの点では少し評価を下げたい気持ちもありますが、今後の使用してからの劣化度を見て考えたいと思います。

Se adaptó bien al filtro hecho n forma casera

Increíble, se puede observar muy bien el sol y sin quedarse ciego, además se puede cortar a diferentes tamaños!

ぼんやり黒点が見える程度です。安価なので、どのような物なのか試してみる程度です。日食メガネに付いてるのと同等品でしょうね。

I have tried the film in front of my camera lens and it blocked the glare of sunlight as expected and left me with a clear image of the suns disk to comfortably and safely view through my camera and telescope.