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Celestron 93624 Narrowband Oxygen III 2 Filter
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Purchase options and add-ons
Brand | Celestron |
Material | Glass |
Photo Filter Thread Size | 50 Millimeters |
Coating Description | Multi Coating |
Photo Filter Effect Type | Neutral Density |
Water Resistance Level | Not Water Resistant |
Product Dimensions | 2"L x 2"W |
About this item
- The 2" OIII narrowband filter isolates the two doubly-ionized oxygen lines (496 and 501 nm lines)
- Filter has ultra-hard, vacuum-deposited coating
- Eliminates un-natural colored halos surrounding bright stars
- Country of Origin:China
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Price | -21% $114.95$114.95 List: $144.95 | -26% $99.95$99.95 List: $134.95 | -9% $99.79$99.79 List: $109.95 | $72.99$72.99 | $19.99$19.99 | $24.99$24.99 |
Delivery | Get it as soon as Friday, May 17 | Get it as soon as Saturday, May 18 | Get it as soon as Friday, May 17 | — | Get it as soon as Friday, May 17 | Get it as soon as Friday, May 17 |
Customer Ratings | ||||||
Value for money | — | — | — | 4.5 | 4.3 | 4.6 |
Brightness | — | — | — | 4.0 | 4.6 | 4.7 |
Sold By | Amazon.com | Amazon.com | Amazon.com | SVBONY Direct | SVBONY Direct | SVBONY Direct |
thread size | 50 millimeters | 50.8 millimeters | 31.75 millimeters | 2 inches | 50.8 millimeters | 51 centimeters |
photo filter effect | Neutral Density | Enhancing | Enhancing | Enhancing | Enhancing | Polarizer |
material | Glass | — | Glass | Glass | Optical Glass, Plastic | Optical Glass |
water resistance | not water resistant | not water resistant | not water resistant | not water resistant | not water resistant | not water resistant |
Product guides and documents
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Product information
Product Dimensions | 1.87 x 1.87 x 0.25 inches |
---|---|
Item Weight | 0.704 ounces |
ASIN | B0007UQNWM |
Item model number | 93624 |
Customer Reviews |
4.4 out of 5 stars |
Best Sellers Rank | #159 in Telescope Filters |
Is Discontinued By Manufacturer | No |
Date First Available | June 17, 2003 |
Manufacturer | Celestron |
Country of Origin | China |
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Product Description
Product Description
The 2" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501 nm 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.
Amazon.com
The Celestron 93624 Narrowband Oxygen III 2-inch filter is a remarkable advance for the serious visual observer of emission nebulae. One of the biggest advantages of narrowband filters is that by passing only the light emitted by nebulae, light from artificial sources like street lights is blocked. This allows you to take detailed exposures of nebulas from a suburban location that can rival shots from much darker sites. The Celestron 93624 is made of high quality, solid plane parallel glass.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the quality, performance, and value of the camera lens filter. For example, they mention it's well-made, enhances the views, and is a great investment.
AI-generated from the text of customer reviews
Customers are satisfied with the quality of the filter. They mention that it's well-made, performs as it should, and produces stunning results. The filter is great for nebulae of all kinds and is highly recommended.
"...About the only thing I can add is that performance has been fully satisfying in every respect and each filter still looks as good as the day I..." Read more
"...Yet is still works well and give nice wide field views on the brighter nebulae...." Read more
"Best bargain in O-III filters to be found.Excellent quality filter. Highly recommended...." Read more
"This rating is for the product which is new. Works well on nebulae, But I got 2 USED ones sent to me from Amazon...." Read more
Customers like the filter. They say it enhances the views, the optics can be great, and it improves views of certain nebulae. The visual contrast can be quite noticeable depending on what type of nibula you are viewing. However, it still works well and gives nice wide field views on the brighter nabula.
"...-made models, but it has been an exceptional scope in every regard: optically, mechanically, and electronically...." Read more
"...The visual contrast can be quite noticeable depending on what type of nebula you are viewing and the seeing conditions...." Read more
"...M27 just comes alive with this filter and looks fantastic...." Read more
"Improved views of certain nebula, great price." Read more
Customers appreciate the value of the camera lens filters. They say it's a great investment and a fantastic price.
"...We believe these are re-branded Baader filters at a fantastic price.----------edit-----------..." Read more
"Improved views of certain nebula, great price." Read more
"Very good performance and price..." Read more
"Great investment, even in a light polluted suburb..." Read more
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Top reviews
Top reviews from the United States
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We still haven't been out to our dark site with the O-III yet, but I did give it a quick try a few weeks ago at our local community college, where we usually just do planetary viewing due to the excessive light pollution. I inserted the O-III in our filter slide and pointed it toward M57, not expecting very much. After all, the Ring is supposedly better suited to a UHC filter than the O-III. The results were absolutely stunning--the nebula appeared as a distinct greenish ring against an inky black background. I then changed to a longer FL EP and directed our CPC 925 to slew over to M27. Usually we can't see the Dumbbell from the college and that night was no exception. Not knowing whether it was even in the FOV, I slid in the O-III filter and the nebula just popped right out, nearly dead center, and with as clear definition as we usually get from the dark site (Bortle's green) with no filter at all.
We will definitely be picking up the UHC and h-beta filters to join this one. At more than twice the price, I can't imagine how the Lumicon O-III could be twice as good as this one, so I'm very satisfied with the Celestron filter, both in performance and value.
UPDATE 7 Sep 2012: Well, it's nearly four years to the day since I bought this O-III and the other Celestron filters, and we've used them at multiple locations under suburban skies, as well as at our dark site. About the only thing I can add is that performance has been fully satisfying in every respect and each filter still looks as good as the day I received them, both optically and physically. I must admit, however, that they live a very pampered life--we use them exclusively in the power/filter slide on our EarthWin binoviewer, and I purchased several additional pairs of carriers so that I never have to swap any filter in & out of a carrier frame. Once mounted in its carrier, each unit only leaves its plastic case long enough to slide it into the binoviewer assembly. (The same carrier also fits newer Denks since they and EarthWin are co-owners on the patent for the power/filter slide system.)
I was very surprised to see the 1-star review posted today by Allen Andrews, since my experience with this filter has been very positive. In fact, I dug out the original packaging for my O-III filter because I didn't remember it arriving in the kind of puzzle box that Allen describes. Sure enough, mine came in a clear plastic hinged storage box similar this one, but smaller: http://www.amazon.com/BCW-Trading-Capacity-Hinged-Holder/dp/B005KDHJBU/ref=pd_sim_sbs_sg_8. It was lined with a thin sheet of foam and the small plastic box was packed inside a slightly larger cardboard box. Fit and finish on the filter appeared flawless right out of the box and I screwed it onto a few different brand EPs and our 2" Zhumell Barlow just to make sure there were no problems with the threads before mounting it in the power/filter slide carrier frame. Allen's review makes me wonder if maybe Celestron is now using a new supplier for this filter and the quality isn't what it used to be. I would recommend that anyone considering this product consult reviews on the astro-vendor websites like Telescopes.com or OpticsPlanet.com, and maybe check the Cloudy Nights forums for any relevant discussion threads.
I must also add that my own experience with Celestron products in general has been the exact opposite of Allen's. I have a Celestron CPC 925 GPS SCT purchased in 2007. It is one of the Chinese-made models, but it has been an exceptional scope in every regard: optically, mechanically, and electronically. I can't say the same for my three Meade scopes--two Newtonian reflectors and an ETX-125 Mak-Cas, all of which came out of the box with various defects ranging from clouded mirrors to faulty drive mechanisms and missing parts. A tripod foot cracked and broke on one of our very first outings with the ETX, even though we always set up on vibration isolation pads. However, I agree with Allen that you can't go wrong with any filter made by Tele Vue or Thousand Oaks, and I'd also add Lumicon to that list. For the money, though, I'm still very pleased with our Celestron nebula filters and OWL Astronomy color filters.
Excellent quality filter. Highly recommended. We spent a few hours on the Veil Nebula at a dark sky site with this filter in an 18" telescope. It pretty much strips out everything that isn't the nebula and leaves an inky black sky highlighted by the bright nebulosity. When Orion came up, we were able to peruse the vast complex field of nebulosity in the Orion region with ease. M27 just comes alive with this filter and looks fantastic.
We believe these are re-branded Baader filters at a fantastic price.
----------edit-----------
Now that the price is near $100, it's not the bargain it once was when it was less than $70.
Top reviews from other countries
Some emission nebula it works fine oetyers not so.
Overall a positive result.