LPR (light pollution reduction) filters are designed to selectively reduce transmission of certain wavelengths of light, specifically those produced by artificial light.  These include mercury vapor, high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emissions in our atmosphere.  The UHC LPR filter has improved contrast over the typical broadband filters, giving darker background skies and noticeably improved contrast of emission nebulae.  The advanced coatings enable and impressive 97% total transmission across the entire bandpass, with total blockage of prominent light pollution lines.  It is a perfect filter for viewing nebula from light polluted skies as well as for boosting the contrast of nebula from dark sky sites.

Reduces Transmission of Wavelengths of Artifically-Produced Light

Multilayer, plasma-assisted and Ionbeam hardened dielectric coatings yield supreme durability

Related Questions and Answers

Q: 1. Does this lock onto the camera like a lens or does it just mount onto the camera without locking onto it?

A: This Fotodiox Astro Edition adapter would fit onto the camera's lens mount and would then accept a lens on the front of it.

Q: 2. Will this fit Sony WH-XB900N?

A: No, these would not fit these headphones.

Q: 3. Will this fit on a canon 5D mark ii?

A: No, you will need the eyepiece that is 18mm.

Q: 4. Do these fit the ATH-M20X headphone?

A: Yes, the Auray UHC-725 Universal Headphone Case is compatible with the Audio-Technica ATH-M20x Monitor Headphones.

Q: 5. Will this fit sennheiser HD-598?

A: I believe it should fit. But, to be sure, double check the dimensions on the specs.

Q: 6. fit beyerdynamic 880?

A: Larger headphones, like the 880, that do not fold, will not fit.

Q: 7. Will this work on a Canon Rebel 1000D/SL1?

A: I am not familiar with this particular Rebel model, but if the LCD screen is one that swivels out away from the camera body, the Hoodeye Eyecup will block this activity. Hope this helps. :-)

Q: 8. Is the zipper smooth?

A: Yes, the zipper on the Auray UHC-725 Universal Headphones Case is very smooth.

Q: 9. Will this fit the Canon EOS 1V?

A: No idea the 1V is old

Q: 10. Would this fit a canon 7D Mark II?

A: Per the description... the 18mm eyecup will not for the 7dii. The 7dii needs the ESS-ECEGG Large Eyecup for Glasses for Canon 22mm Eyepieces from Vello