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Celestron Telescope Oxygen III Narrowband Filter - 1.25 Inch

Item# CELE137
 
4.5

(17 Ratings)

Customer Q & A

Price:

$79.95

List Price: $107.95
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  • 1.25 inch format OIII Narrowband filter
  • Isolates just the doubly-ionized oxygen lines
  • Extreme contrast vs black sky background
  • Excellent for the Veil, Ring, Dumbbell, Crescent and Orion
  • Designed to block all visual spectrum rage 400-700 nm
Details & Dimensions
Guarantee & Returns

Description

Celestron's 1.25-inch, Oxygen III narrowband filter is a must for viewing nebulae.


Oxygen III filters transmit wavelengths from the two doubly ionized oxygen lines but block virtually all others. That gives increased detail and improved contrast when viewing diffuse and planetary nebulae. You'll get stunning 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 to 700 nm. This eliminates the unnatural, colored halos surrounding bright stars common with OIII filters of less-sophisticated coating technology.

 

The 1-1/4" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm 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 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.


CHOKING HAZARD - small parts may pose a risk to children under 6 yrs.

 

Supplier Sku:
93623
Shipping Restrictions:
Available for shipment to the USA and Canada only.

Dimensions & Specifications

Size

1.25 Inches

Type

Narrowband Filters , Oxygen III Filters

Brand

Celestron

Telescope Accessories Series

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The Perfect Accessories

Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews
Celestron Telescope Oxygen III Narrowband Filter - 1.25 Inch
 
4.5

(based on 17 reviews)

Ratings Distribution

  • 5 Stars

     

    (10)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (10)
  • Great optics (7)
  • Strong construction (6)
  • Widely compatible adapter (3)

Cons

    Best Uses

    • Astronomy (14)
    • Bright conditions (7)
    • Astrophotography (4)
      • Reviewer Profile:
      • Casual/ recreational (7), Avid adventurer (5)
      • Was this a gift?:
      • No (5)

    Most Liked Positive Review

     

    Great in dark sky

    It does not do much in light polluted skies as some might think and it actually makes things worse with certain nebulae. For example, if you look at the crab nebula, it makes it...Read complete review

    It does not do much in light polluted skies as some might think and it actually makes things worse with certain nebulae. For example, if you look at the crab nebula, it makes it disappear completely. It also wipes out all 8 magnitude stars from view. However, if you use it in the country sky and you look at reflection nebulae, it is quite amazing. For example, the Orion nebula looks twice as big. The Running Man nebula, which is invisible without the filter, suddenly comes to life with the filter. These nebulae have also more contrast. Hope this helps.

    VS

    Most Liked Negative Review

     

    Great overall, but some big drawbacks

    First, don't rely on the picture. The first thing you'll notice is that this makes a great mirror, this mirror in turn reflects alot of light out, except that from moderately bright stars....Read complete review

    First, don't rely on the picture. The first thing you'll notice is that this makes a great mirror, this mirror in turn reflects alot of light out, except that from moderately bright stars.
    I tried it on the Ring Nebula first and it definitely made it pop out easier, but there was noticeable dimming on the background stars, many even disappeared. I tried it on the moon next at saw that it works well as a glare reduction filter, mostly because it reflects alot of light out. I tried it on the sun today and saw that it increases solar granulation visibility and surface-to-sunspot contrast. It also gives stars a deep green tint. Tonight, clear skies permitting, I hope to try it on the Dumbbell Nebula and Veil Nebula, both of which are advertised to be easier to see with this filter.
    While I might not have the most uplifting review, I encourage you to try this for yourself, maybe you'll have some better luck.

    A cool thing you can do with this is look at something bright (i.e. a light bulb or outside) and rotate it with your fingers and keep your eyes on the object. I'll let you discover what happens.

    Reviewed by 17 customers

    Sort by

    Displaying reviews 1-5

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    4.0

    O III filter works well

    By John

    from dickinson tx

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Easy To Use
    • Great Optics

    Cons

      Best Uses

      • Astronomy
      • Bright Conditions

      Comments about Celestron Telescope Oxygen III Narrowband Filter - 1.25 Inch:

      finally got time to try the new filter.
      works very well for it's intended purpose.
      thanks.

      • Was this a gift?:
      • No

      (1 of 1 customers found this review helpful)

       
      3.0

      Nebulae are brighter and bigger

      By Josh Wilson

      from Phoenix, AZ

      About Me Professional Guide

      Verified Reviewer

      Pros

      • Easy To Use
      • Great Optics
      • Strong Construction
      • Widely Compatible Adapter

      Cons

        Best Uses

        • Astronomy

        Comments about Celestron Telescope Oxygen III Narrowband Filter - 1.25 Inch:

        I purchased this filter because light pollution was infecting my night skies and observing sessions. I first tried this on the Ring Nebula in Lyra. It did pop out 100% better but mostly because it wiped out most background stars and singled out the nebula. Next was the Dumbbell Nebula. For the first time I was able to clearly see the shape and structure of the Dumbbell.
        If you use your peripherals during DSO observations, you'll will be so tempted to look directly at the object because of the detail this filter reveals. The Lagoon Nebula looked much brighter and filled the entire FOV. A great filter for a modest price.

        You'll notice, too, that this filter gives a green tint to stars. This may be annoying but it is for a reason: This filter filters out all other light except that emitted by O-III molecules. On the spectrum, O-III is part of the green color, just as H-Alpha and Beta are part of the red color and so on. When it allows only O-III molecules in, it lets in green light. As for the dimming of stars, this filter passes just 6nm of the light spectrum through (496nm-501nm), which is why stars appear dimmer.
        With my nack for optics, the elements, and astronomy, I knew all of this would happen and decided the pros outweighed the cons and purchased this. Celestron may be angry that their customers complain about the "excessive dimming of stars" or "deep green tint", but if you know optics, you can expect all of this and know there's a reason for it all.

        Clear skies and great observing, Josh

        • Was this a gift?:
        • No

        (0 of 1 customers found this review helpful)

         
        3.0

        Great overall, but some big drawbacks

        By Josh Wilson

        from Mesa, AZ

        About Me Professional Guide

        Pros

        • Easy To Use
        • Good Padding
        • Strong Construction
        • Widely Compatible Adapter

        Cons

        • Dims background stars

        Best Uses

        • Astronomy
        • Astrophotography

        Comments about Celestron Telescope Oxygen III Narrowband Filter - 1.25 Inch:

        First, don't rely on the picture. The first thing you'll notice is that this makes a great mirror, this mirror in turn reflects alot of light out, except that from moderately bright stars.
        I tried it on the Ring Nebula first and it definitely made it pop out easier, but there was noticeable dimming on the background stars, many even disappeared. I tried it on the moon next at saw that it works well as a glare reduction filter, mostly because it reflects alot of light out. I tried it on the sun today and saw that it increases solar granulation visibility and surface-to-sunspot contrast. It also gives stars a deep green tint. Tonight, clear skies permitting, I hope to try it on the Dumbbell Nebula and Veil Nebula, both of which are advertised to be easier to see with this filter.
        While I might not have the most uplifting review, I encourage you to try this for yourself, maybe you'll have some better luck.

        A cool thing you can do with this is look at something bright (i.e. a light bulb or outside) and rotate it with your fingers and keep your eyes on the object. I'll let you discover what happens.

        • Was this a gift?:
        • No
         
        5.0

        Nice piece

        By coroner

        from IL.

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Easy To Use
        • Good Padding
        • Great Optics
        • Strong Construction

        Cons

          Best Uses

          • Astronomy

          Comments about Celestron Telescope Oxygen III Narrowband Filter - 1.25 Inch:

          works very good

          Service and delivery comments:

          great service

          • Was this a gift?:
          • No
           
          5.0

          Great filter

          By Rob

          from Newberg, Or

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Easy To Use
          • Great Optics

          Cons

            Best Uses

            • Astronomy

            Comments about Celestron Telescope Oxygen III Narrowband Filter - 1.25 Inch:

            Great for urban use

            • Was this a gift?:
            • No

            Displaying reviews 1-5

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            Customer Q & A

            Q1: I recently purchased a pair of Brand: Zhumell Model: Tachyon 25x100 Astronomical Binocular w/Locking Aluminum Case Advertising states it will accept standard 1.25" filters. (moon, etc) Q: Do I need to purchase qty 2 filters (one for each eye piece)

            A: Yes, you will need two filters, one for each eyepiece.

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