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.
Available for shipment to the USA and Canada only.
Dimensions & Specifications
Telescope Accessories Series
Celestron Telescope Filters
Oxygen III Filters
Marketplace Type Code
Oxygen III Filters
We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.
Celestron has a limited lifetime binocular and spotting scope warranty and all other products have a 2 year manufacturer's warranty covers against defects is provided. If you have specific questions about this product's warranty please contact Celestron's Customer Service department at 310-328-9560.
Return & Exchange Policy
At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.
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.