Use the Baader 685nm IR-Pass Filter (2") for Astronomical Useto enhance the views and images of planets. Utilizing IR Phantom-Group optical multi-coatings, the filter only allows the narrow long deep red 685nm wavelength to pass through to your eye, minimizing the appearance of atmospheric turbulence during planetary viewing and imaging sessions. Views through the filter reveal dark structures on Mars, Jupiter, and the Moon with enhanced contrast. The filter is set in a 2" mount threaded to fit standard eyepieces.

Ideal for Planetary Viewing and Imaging    View in the Long Deep-Red Wavelength    IR Phantom-Group Optical Multi-Coatings    Passes the Narrow 685nm Bandwidth    Fits Standard 2" Filter Threads    Reduces Appearance of Air Turbulence

Related Questions and Answers

Q: 1. How can we adapt the 2" UV bandpass filter to a Sony E-mount 49mm lens?

A: I know of no adapter to mount a 2" (50.8mm) filter on to a 49mm opening. I do know some that use gaffing tape.

Q: 2. Dose it has a Ultra-Short version like EOS adapter?

A: Celestron T-Ring for Nikon F-Mount Cameras BH #CETRN • MFR #93402

Q: 3. how can I adapt the Baader U-Filter 2" to a Nikkor AF-S 50mm 1:1.8G Lens?

A: 2" is the outside diameter of the filter, not the thread. It's an M48 thread as stated on the manufacturer website, baader-planetarium. Use a normal step-up ring.

Q: 4. is this a filter that makes planets less bright?

A: Yes, Neutral Density filters make things darker however. It is mainly for use with the moon. The Alpine Astronomical Baader 0.6 Neutral Density Filter to reduce the amount of light coming into your eye during lunar observation and improve the view and contrast.

Q: 5. What size would you recommend for a Zeiss 20x60 IS binoculars? Are these the safest filters to use? Thanks.

A: The Alpine Astronomical 60mm Baader AstroSolar White-Light Solar Filter for Binoculars (Single) BH #ALASBF60 • MFR #ASBF-60 would be the appropriate sixe for the Zeiss 20x60 IS binoculars.

Q: 6. Is this 48mm?

A: No it is 2 inches which equals 50.8 mm B+W 48mm UV/IR Cut MRC 486M Filter BH #BW486MC48 • MFR #66-1069163 https://www.bhphotovideo.com/c/product/718417-REG/B_W_66_098546_66_098546_48mm_UV_IR_Cut.html

Q: 7. Is this the filters that makes planets not looks like a white dots and see details?

A: The Alpine Astronomical Baader 0.9 Neutral Density Filter is not for planetary use. It is used to help reduce the brightness of the moon so you can see the details of the moon better and improves contrast.

Q: 8. My Nikon Action EX 16x50 binos have an outside diameter of exactly 60mm. Should I order the 60mm filters or the 70mm?

A: The Alpine Astronomical 60mm Baader AstroSolar White-Light Solar Filter for Binoculars (Single) would be too large to fit 16x50 binoculars. This Daystar kit would fit instead: https://bhpho.to/3qFnkJe

Q: 9. Will this work with Bausch and Lomb discoverer scope ?

A: You do understand this is a two part system. This part mounts to your Canon EF mount body. the other end can attach to numerous items https://www.bhphotovideo.com/c/search?Ntt=%20T-2%20Astro%20Modular%20System&N=0&InitialSearch=yes&sts=ma

Q: 10. Is this eyepiece barrel 1.25/2" or only 1.25" ?

A: The Alpine Astronomical Baader Hyperion 68° 10mm Astronomical Eyepiece (1.25"/2"), will work both with 1.25" and 2" holders." (We can see in the Overview it is explained-This eyepiece with a unique modular design that allows it to fit into standard 1.25" holders and accessories with the ability to remove the primary snout and have it fit into larger 2" holders as well.)