The 1.25" Oxygen III Narrowband Filter from Celestron yields high transmissivity by blocking unwanted longer wavelengths of light, giving higher contrast to your observation and photographic experiences. By isolating just the two 496 & 501nm doubly-ionized oxygen lines emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae among other objects.

Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400-700nm, eliminating the unnatural colored halos surrounding bright stars common with less sophisticated O III filters.

Specifically Designed to View Nebulae    Isolates Two Doubly-Ionized Oxygen Lines    Eliminates Halos Around Bright Stars    Fits 1.25" Eyepieces and Accessories

Related Questions and Answers

Q: 1. Will this work for the Celestron AstroMaster 130EQ-MD as well as the Advanced VX 8" Newtonian? Both?? Thanks.

A: Yes both, individually

Q: 2. What is the Ah rating of the battery?

A: Ah is the amp-hour rating for this 12 volt batery. It's rated 7 Ah which gives you an idea of its max capacity.So, you will need to make sure that you use it for loads that draw under this 7 amp level.So a good rule of thumb is to cut the rating in half. For this battery, you divide the 7 in half and get 3.5 amps. This means that you an charge or operate a device that is 3.5 amps for 2 hours.Or, more realistically, you can charge or operate a device that draws say 0.5 amps for 7 hours., (0.5ampsx7 hrs= 3.5amps). Get the idea? I was using this to operate my smaller telescope mounts that drew about 0.2 amps. This allowed many hours without worries of power outage. But more recently, I bought a larger mount that draws 0.3 amps during normal tracking, but up to 4 amps for fast speed slowing. After about 2 hours I was getting power interrupts. This really was bad for my long exposure photography that requires 3-5 hours for continual tracking.Anyway, hope this helps you understand Ah ratings. Regards,Dino

Q: 3. Will this work on the Astrofi 130?

A: The Celestron PowerTank 7 Ah 12 VDC Power Supply is compatible with the Celestron Astro Fi 130mm f/5 Reflector Telescope.

Q: 4. Could it be carried on board aircraft? Please advise us. Thank you

A: Traveling with batteries have many rules and regluations and can changed based off of the different airlines. It woud be best to check with the airline you are using before you fly.

Q: 5. This item is have a International warranty or only America units warranty?

A: New product has a international 2 year warranty

Q: 6. Does this use an LED bulb?

A: The small light on top (with the red cap) is a small, relatively dim, incandescent bulb with a yellowish tint (unless you have the red cap on, which makes it red). The bottom larger light contains 30 white LEDs and is pretty bright. It doesn't compare to a nice CREE flashlight or anything, but the beam is bright and wide.

Q: 7. Will there be a version for Sony E Mount?

A: Unfortunately no but you could get this 85mm f1.2 Mitakon instead: https://bhpho.to/3Cgu5Tn

Q: 8. How is this to set-up? I've heard several nightmares about the previous version. Is this pretty quick and painless to get balanced and start shooting? (FYI, I plan to use a Sony A7S2 with a smallish lens).

A: All reports suggest this product is a straight forward set up.

Q: 9. does this lens for Nikon Z communicate with the camera (focal length, f stop)?

A: The TTArtisans 90mm f/1.25 Lens for Leica M can be adapted with the 7artisans Photoelectric LM-Z Adapter Ring for Leica M Lens to Nikon Z Camera, BH # 7ALTRNZ, but there would be no electronic connections to read the focal length or F-stop. https://bhpho.to/3DfMp1e

Q: 10. Does this lens obstruct the viewfinder of a m10?

A: Yes, it blocks a great deal of the viewfinder. Leica recommends using the live view mode or a viewfinder like the Leica Visoflex (Typ 020) Electronic Viewfinder B&H # LEVSB.