Baader Planetarium UHC-S Nebula Filter - 2" FUHC-2

Absolutely makes a difference in your direct natural viewing of emission nebulae. I can't yet attest to how well it holds up on first night photography, but on first night natural viewing it really is spectacular. Astrophotography is a trick of the eye, and something your eye will never naturally see because human eyes don't work that way.Not even with an umpteen billion dollar telescope will you ever look thru a scope and lens and see hubble images no matter how dark your skies are. The only way you see images like that is by spending thousands on money pit gear, treking off to the darkest skies, then spend hours or days photoshopping the hell out of your pictures. Except Orion of course, no matter how many times you see it Orion remains breathtaking.But even to the naked eye on other nebulae you will see dispersion of red and blue across nebula fields that look like aberration - but aren't with this filter. Even under heavy city light pollution. Love it! well worth the money upon first impression.

I’ve used this on many nebula, and it will separate the lights and darks across the field of view quite nicely. Waited a while to review and after a hundred hours under the stars I’ve had success with this Filter. Know the reasonable limitations, aperture will improve the results of this Filter, my fathers 12” dob really does well with most nebula using this Filter, however my 4” APO is a little more dim, and so unless imaged some nebula will look similar to the original unfiltered view. As far as bandwidth, there’s a good range, but not too much light, making nebula pop-out better than the unfiltered view, but again aperture will maximize the benefit of the Filter. Stars look a nice blueish white while viewing, and focus to a nice pinpoint with no noticeable aberrations, it’s a view to get used to. I have yet to do any serious imaging with this Filter, but it would be a great imaging Filter to add to a collection. Last note, somewhere here it was mentioned that the Baader Planetarium filters wouldn’t thread to Orion diagonals and eyepieces, it fits all of my Orion gear like a glove, so no worries there.Clear Skies

Works

Will not work on Orion Branded Eyepieces. If you have just about any other brand, this is an amazing filter that makes nebulae easier to see. I also use this on the Moon to clean up some of the blue fringe and make the craters a bit sharper. If you are going to hunt the "faint fuzzies" a filter like this will come in handy.

Works well! Despite using a non-astro modified DSLR, worked quite well with my Nikon D7000. This is my second Baader filter, other being OIII, will definitely be purchasing more!

In the early 80s, Lumicon first produced a line of 4 light pollution filters. These were the Deepsky, the UHC, the OIII, and the H-Beta.The Deepsky filter was more useful for astrophotographers. Most bought the UHC and the OIII. Rich people added the H-Beta to see the Horsehead Nebula.The UHC-S from Baader falls somewhere between the Deepsky and UHC. It transmits the OIII and H-Alpha lines, plus a bit extra on either side of these emission lines. The rest of the visible spectrum gets cut off. Indeed, from on-line reports the UHC-S rejects more of the visible spectrum than the UHC filter from Lumicon.I also own a far more selective UHC filter from Astronomik. It also allows the H-Alpha and OIII lines through, but little else. It does a better job of bringing out faint nebula. It does less well with star clusters with associated nebulosity. I'm thinking of M8 (the Lagoon), in particular, and also M42 (the Orion Nebula). The Baader UHC-S gives more prominence to the stars; they look more natural, instead of looking like superimposed dots of red and green.This is a very useful, general purpose filter.