Celestron 94123 1.25-inch UHC/LPR Filter with Multi-Layer Dielectric Coatings - Optimises Spectral and Optical Characteristics for Improved Celestial Viewing, Black

Good filter for intensified astronomy (Night Vision), while it doesn't block all skyglow, it reduces it significantly and allows all the important bands through, H-Alpha, Beta and I think O3 too so you can get a good glimpse and things like the helix nebula using night vision gear. A friend has it and doesn't like it for astrophotography due to "color shift" not sure if this is true but I figured it was worth mentioning.

This UHC filter does its job at making nebulae have more contrast and more shape. This filter works with emission and planetary nebulae. It makes nebulae have about 30% more contrast. It is especially effective on the orion nebula and even bette on the M27 Dumbell nebula. The below reviewers clearly do not know how lpr filters work. It will not eliminate light pollution, just lessen the effect of it. I use this on my Orion XT10i Dobsonian (10 inch aperture). The uhc filter is more well rounded than an OIII filter. It is actually $20 cheaper on Amazon than on Celestrons own website.

Incredible,,,, at naked eyes there where no stars, rainy and cloddy days all week, lower clouds shinning the lights of the city at background so I put this filter in a XCEL 25mm on a 130EQ Celestron Astromaster and it was fantastic!!!!!!! I had compared it with an 24mm eyepiece without the filter and really works!!!! The other side is that it is very reflective so you will notice something shinning inside the eyepiece so u need to be in the completely dark or put your hands around eyepiece. Nice, very nice.

I used this one morning before dawn to see planets. Actually with remote work, there’s less pollution of all types now - so I can see the atmosphere better! Glad I bought this though! Recommended for viewing aide for your telescope.

I purchased this filter expecting to have a notable light pollution reduction, enhancing the quality of the images (planets, nebulae) , but the reality is that only see images colored in blue- violet, may be some details improving , but nothing remarkable. May be its due I'm living in a great light (and air) pollution place, so I need to use it in a less light pollution area to check the performance.

I live in Milpitas California and without this filter it was difficult to spot the orion nebula(pretty much blend into the background). Definitely made a difference for me. Just a heads up that what you'lll see in the telescope will be a white blob unless you use photography. The telescope that I use is an 8" Orion dobsonian telescope. Also, it does dim certain stars so don't expect to see every stars.

I can tell a difference between using it and not on the orion nebula. You can see the edges a little better. Maybe it would be better with a larger telescope. I have a Meade 114mm f/8.

Emboldened by the success I had at viewing the Orion Nebula from my light polluted sky with a narrow band filter, I decided I needed a broadband filter to attempt to see H-Alpha transmissions which were blocked by the narrow band filter. Cheaper filters that that provided a transmission characteristic graph (shows the wavelengths that are allowed thru the filter) I ruled out because of their graphs. While this filter didn't provide a graph, Celestron seemed to be a popular brand. My choice came down to this filter and the Orion Skyglow filter. I chose this one because of the price. It ended up being wasted money. There was little to no effect at viewing the Orion Nebula with it verse without it. In the future, I'll go with the product that gives me more information rather than taking a chance on one that doesn't and avoid the disappointment.