Celestron – EclipSmart Safe Solar Eclipse Telescope and Camera Filter – Meets ISO 12312-2:2015(E) Standards – Works with Your Telescope, Spotting Scope, or DSLR Camera – Observe + Photograph Eclipses

I tested this filter out against a lot of other ones and while this one wasn't the best, it did have the virtue of being the most versatile. The ability to collapse or expand the opening to fit a lot of different telescope and camera lens sizes is very handy! And it has excellent design and construction for what is basically a paper-craft project with a bit of solar filter film super-glued to a bit of cardboard. The directions are a bit hard to follow because of the uneven drawing skills of whomever did the art, but once you have the idea, it's fairly easy to construct and get it into the proper configuration. The solar filter is obviously not H-alpha quality, so you won't see solar prominences, but I was able to make out sunspots without too much difficulty. The color balance of the filter is also fine, tinting the sun to the orange-red side of the spectrum, which reduces eye fatigue when keeping the sun under longer observation. This will work fine for the coming eclipse or for any other solar observation use!

I travelled to the US-Canada border with a few cameras and used this filter to capture the total eclipse on April 8, 2024. It's a square cardboard item, but the filter is professional grade, and I used it for two Nikon DSLRs and a Canon Pro HD video camera. Perfect results.

This item works very well, but they need to come up with a much better way to secure it to your telescope or camera. Even a brief exposure to magnified sunlight can damage your eyes so make sure this is very well secured before using it.

Does what it's supposed to do. My images come out clean though this filter.

OK, you're only going to do this once 04.08.2024, so why spend a bunch of money, right? I thought this might work until I tried to zoom my lens out. Oops, the mounting fell apart. Filter materials needs to be kept flat or you will get distortion. Lots of luck. P.S. Celeston makes a regular screw-on filter for $50. That's what I ended up with. Works great.

I have an inexpensive (affordable, but not 'cheap') backpack telescope. I wanted something for it for sunspot gazing and this seems like a good option. Coming from Celestron, I'm confident in its design over unknown alternates. It comes in a flat pack, but is really easy to fold into shape and using the included straps to attach it to my scope. In use, it does block out a large amount of sunlight to make the sunspots viewable (I didn't have a camera attachment when I tried it, so I can't show it). Construction is basically heavier cardboard and coated paper filter and plastic velcro. Glass filters are more than 10x as expensive, so this option is good choice for me. NOTE: the instructions state this and I'll repeat it here: remove the spotting scope before pointing at the sun to avoid damaging it or anything behind it.

This was perfect for photographing the Sun and not damaging my equipment or my eyes.

I use this filter on my Canon R7 and am pretty happy with it. It doesn't fit securely on the RF 100-400 mm lens, too big and not sure how to adjust down. The best thing in my opinion is how it gives the sun a nice yellow orange color (first and third pics), much nicer than the white image I get from a more expensive glass ND 16.6 stop filter (second pic taken a few days later). However, it's not as sharp as that filter and there is a glow around the solar disk, which is aesthetically pleasing but more an artifact of the filter rather than true to life. Nit-picky I know but there it is. I like this Celestron filter and trust that it's protecting my gear from damage. Pretty good for 20 bucks.