These filters work, especially in areas rich with sodium/mercury vapour lights, but don't expect total cancellation or miracles. It does help bring out details and colours in the night sky, but it isn't quite the same as a Optolong or STC LP filter. Mine has scratched easy and I'm very careful with my equipment. I use a Mindshift Filter Hive with plush sleeves and it has still scratched.

A must to protect the front element of your expensive lenses without interfering with the optical quality

These are great! MUCH heavier base than I expected. There are very tiny felt pads that go on the bottom to protect your floor, I was short one and they could stand to be just a tad thicker. They are so thin that I am not sure they will actually protect the floor, hence the 4 stars.

A little on the heavy side but not unbearable , will definitely protect the screen. Pairs great with the xbox series S

I bought two sets of these flash gels for my two Yongnuo YN-560 IV flashes, mostly because I needed a CTO gel to match my Nikon SB-910's CTO gel in my outdoor shoots (and the other colors could be useful for wedding reception dancing). When I tested the Selens full CTO gel I was dismayed to see that it was a lot more yellow than orange compared to my SB-910 + Nikon CTO filter (see photo). However after some testing I found a combination of Selens gels that produced a color very close to the Nikon CTO filter. The combo that worked best is the "Oklahoma Yellow" gel plus the 1/2 CTO gel. I tested it with both combinations just to make sure the colors were consistent if I swapped them, and they were. The only other thing is there was a noticeable difference in color of the same gel, between the two sets I got (see last photo). Otherwise, besides those two things, the setup works well, the rubber band works on my YN-560 IVs and SB-910 well and is easy to use to install and swap out gels. I would still recommend these despite those two slight cons to this product.Edit: After reading some other reviews it seems like the Oklahoma Yellow and Full CTO are switched. Although it's hard to tell for sure (the colors on the info sheet aren't quite reliable either) I've switched them in my own set. Even then, I would still need a 1 and 1/2 CTO gel to match my Nikon Speedlight. Not the worst thing in the world, but it does mean I have to mount two gels. Also, I might consider hole punching all of the gels + info sheet so I it'll be easier to keep together especially in the field.

It didn't take a long time to assemble and if needed there is a very detailed easy to read instruction sheet. The product came 2 days early which I was very excited about.

LIKE: Sound quality, music choices, reasonable price, appearance.DISLIKE: No guidance sheet was provided with recommended words, phrases, etc. to get Alexa on my preferred "track".

This filter literally changed the entire dynamics of my 2016 Rogue SV. The CVT transmission shifts smoother, and faster, the pick-up is much better, and the car idles smoother. The transmission before was getting a lag in shifting ratios, as the stock filter even when still quite new, was restricting air flow and now allowing the cylinders to drop RPM at the same rate the transmission could. This created unresponsive shifting at RPM's over 3500. Really making the car feel sluggish, and unwilling to get up and go. I still wish there K&N would make and air intake kit for the nissan rogue, the filter is good, but the stock plastic ducting is cheap, and almost as restrictive as the stock filter itself. The design of the rogues engine places the intake manifold on the backside of the engine, making the intake temps somewhat high. An insulated aluminum intake would greatly reduce air temps at the cylinder head.