Q1: Hi, I am interested in this light pollutin filter: http://www.telescopes.com/products/celestron-uhclpr-filter-1-25-inch-32972.html# Will it fit in my Orion 1.25" eyepieces? Are the threads standard across brands?

A: Yes, the Celestron LPR filter will fit your Orion 1.25-inch eyepieces. The threads are standardized.

Q2: I want to know which filter(s) will be the best one for observing from my area. There is quite a bit of light pollution and alot of haze towards the horizon. The limiting magnitude is about 9-10 (with a telescope). I want to mainly observe galaxies an

A: Unfortunately, no filter will solve the haze problem; that's air pollution. However, the Celestron UHC/LPR Filter can do something about the light pollution. It's the filter you want for viewing in light-polluted skies.

Q3: Will the Celestron UHC/LPR Filter - 1.25 Inch fit on the eyepieces in the Zhumell 1.25in. Eyepiece and Filter Kit?

A: Yes, the Celestron UHC/LPR Filter should work just fine with the Zhumell eyepieces.

Q4: I have a Celestron 127 EQ and live in a light polluted suburb between San Francisco and San Jose. What type of LPR filter do you recommend? What is the difference between an LPR, high contrast, O-III, narrow bandwidth, etc.? Do these all do the same thing? And in what situations are each most effective? Thanks!

A: All of these filters essentially do the same thing.  They will all block out certain band widths and project a high contrast image but there are a few differences.  The O-III is the only filter that is recommended for photography because it is made with a thinner glass.  The LPR is the only filter you would want to use to battle light pollution because it has additional coatings applied for this purpose that the others don't.  For your needs the LPR is the best choice.