Skip to content
  • ✨ FREE SHIPPING ON ORDERS OVER $60 ✨
  • ✨ FREE SHIPPING ON ORDERS OVER $60 ✨
SALELONGSKIRTGSALELONGSKIRTG
  • Orion
  • Celestron
  • Primalucelab
  • Ioptron
  • Chroma
  • Login
  • Cart / $35.10 1
      • × Orion 17mm Sirius Plossl Eyepiece – 1.25″ Online SaleOrion 17mm Sirius Plossl Eyepiece – 1.25″ Online Sale 1 × $35.10

      Subtotal: $35.10

      View cartCheckout

  • 1

    Cart

    • × Orion 17mm Sirius Plossl Eyepiece – 1.25″ Online SaleOrion 17mm Sirius Plossl Eyepiece – 1.25″ Online Sale 1 × $35.10

    Subtotal: $35.10

    View cartCheckout

“Orion 17mm Sirius Plossl Eyepiece – 1.25″ Online Sale” has been added to your cart. View cart
Sale!
Home / Orion

Orion UltraBlock Narrowband Filter – 1.25″ Round Mounted Sale

$79.99 Original price was: $79.99.$64.00Current price is: $64.00.

Browse
  • Astrozap
  • Ats
  • Avalon
  • Baader
  • Celestron
  • Chroma
  • Coronado
  • Dew Not
  • Explore Scientific
  • Field Tested Systems
  • Gerd Neumann
  • Hotech
  • Ioptron
  • Losmandy
  • Lunt Solar
  • Meade
  • Officina Stellare
  • Opt
  • Optec
  • Optolong
  • Orion
  • Pegasus Astro
  • Pentax
  • Planewave
  • Primalucelab
  • Qhy
  • Qsi
  • Revolution Imager
  • Sbig
  • Sharpstar / Askar
  • Sky Watcher
  • Software Bisque
  • Spectrum Telescopes
  • Starizona
  • Starlight Instruments
  • Starlight Xpress
  • Stellarvue
  • Takahashi
  • Uncategorized
  • Description
  • Reviews (0)

Orion UltraBlock Narrowband Filter – 1.25″ Round Mounted

Orion 1.25″ UltraBlock Telescope Filter

If you observe from highly light-polluted sites, or if you want the maximum contrast enhancement in observing faint emission nebulas from areas of moderate light pollution, an Orion UltraBlock filter is for you. With an UltraBlock, emission and planetary nebula are even visible from urban areas, where they are completely invisible without a filter! In darker-sky locations with only moderate light pollution, many objects will appear significantly enhanced over unfiltered and wideband filtered views.

Orion UltraBlock Telescope Filters block all forms of light pollution, including both narrowband mercury- and sodium-vapor lighting and broadband light pollution sources. UltraBlock Filters reject pollution from incandescent and fluorescent lighting, which wideband filters can’t stop. Extremely high (99.9%) blocking of critical mercury and sodium emission bands and very high transmission of hydrogen-beta and ionized oxygen wavelengths result in the highest contrast gain of any competing light pollution filter.

Orion 1.25″ UltraBlock Telescope Filter Features

  • In areas plagued with significant light pollution, our UltraBlock eyepiece filter greatly increases contrast of emission and planetary nebulas
  • Allows you to see features and details through a telescope that would normally be lost due to light pollution
  • Blocks all forms of light pollution while passing critical hydrogen-beta and ionized oxygen wavelengths of light
  • Enhances the sky presence of a significant number of fainter deep-sky objects
  • Use with any 1.25″ Orion eyepiece threaded for filters

Orion Product Number: 5654

A User’s Report: “The Orion UltraBlock filter was a real surprise for this observer. It of course reduces the brightness of stars, and diminishes the image of globular clusters, but the resultant black sky background is astonishing. On my first try of the UltraBlock, I observed the Orion Nebula rising just above my roof early one evening. The entire sky was pink to the naked eye, and hardly any background stars were visible in the telescope. The nebula was a washed-out and vague caricature of the stunning sight that it is in a desert sky. In went the UltraBlock, and suddenly the faint tendrils of glowing clouds were visible, against a velvety deep-black background! I eagerly turned the telescope to the Pleiades, and the UltraBlock unmistakably brought out the nebulosity around several of the brightest stars…in a 4″ telescope! In a few moments I had found the vague cloud of M1, which I have never been able to view from my urban front yard. Before using the UltraBlock, I had felt that my front yard was suitable only for planetary observing. Now that I’m hooked on the UltraBlock, I spot a new Messier object within minutes each time I take out my telescope.”

– 

  • In areas plagued with significant light pollution, our UltraBlock eyepiece filter greatly increases contrast of emission and planetary nebulas
  • Allows you to see features and details through a telescope that would normally be lost due to light pollution
  • Blocks all forms of light pollution while passing critical hydrogen-beta and ionized oxygen wavelengths of light
  • Enhances the sky presence of a significant number of fainter deep-sky objects
  • Use with any 1.25″ Orion eyepiece threaded for filters

Reviews

There are no reviews yet.

Be the first to review “Orion UltraBlock Narrowband Filter – 1.25″ Round Mounted Sale” Cancel reply

Related products

Sale!
Orion 10″ Safety Film Solar Filter for Reflectors For Sale
+
Quick View

Orion

Orion 10″ Safety Film Solar Filter for Reflectors For Sale

$169.99 Original price was: $169.99.$86.00Current price is: $86.00.
Sale!
Orion 1.25-inch Universal Camera Adapter Online
+
Quick View

Orion

Orion 1.25-inch Universal Camera Adapter Online

$29.99 Original price was: $29.99.$28.99Current price is: $28.99.
Sale!
Orion 10″ f/8 Ritchey Chretien Reflecting OTA Telescope For Sale
+
Quick View

Orion

Orion 10″ f/8 Ritchey Chretien Reflecting OTA Telescope For Sale

$2,999.99 Original price was: $2,999.99.$90.00Current price is: $90.00.
Sale!
Orion 20mm Illuminated Centering Eyepiece – 1.25″ Fashion
+
Quick View

Orion

Orion 20mm Illuminated Centering Eyepiece – 1.25″ Fashion

$129.99 Original price was: $129.99.$87.00Current price is: $87.00.
Sale!
Orion 1/4-inch-20 Adapter for Orion Telescope Mounts Fashion
+
Quick View

Orion

Orion 1/4-inch-20 Adapter for Orion Telescope Mounts Fashion

$21.99 Original price was: $21.99.$20.99Current price is: $20.99.
Sale!
Orion 2″ Dielectric Mirror Diagonal Cheap
+
Quick View

Orion

Orion 2″ Dielectric Mirror Diagonal Cheap

$149.99 Original price was: $149.99.$85.00Current price is: $85.00.
Sale!
Orion 20mm Sirius Plossl Eyepiece – 1.25″ Online now
+
Quick View

Orion

Orion 20mm Sirius Plossl Eyepiece – 1.25″ Online now

$38.99 Original price was: $38.99.$35.10Current price is: $35.10.
Sale!
Orion 150mm – 203mm Telescope Heating Band For Sale
+
Quick View

Orion

Orion 150mm – 203mm Telescope Heating Band For Sale

$72.99 Original price was: $72.99.$58.40Current price is: $58.40.
Latest
  • Takahshi 1.25-Inch Eyepiece Adapter Online Sale Takahshi 1.25-Inch Eyepiece Adapter Online Sale $108.00 Original price was: $108.00.$98.00Current price is: $98.00.
  • Takahashi Wide Mount T-Ring for Nikon DX-WR Online Takahashi Wide Mount T-Ring for Nikon DX-WR Online $167.00 Original price was: $167.00.$87.00Current price is: $87.00.
  • Tele Vue 0.8X Reducer – TV102 Online Sale Tele Vue 0.8X Reducer – TV102 Online Sale $394.99 Original price was: $394.99.$99.00Current price is: $99.00.
  • Tele Vue 1 Micron Indicator Kit – 2″ Cheap Tele Vue 1 Micron Indicator Kit – 2″ Cheap $629.01 Original price was: $629.01.$95.00Current price is: $95.00.
Best Selling
  • Chroma LRGB & H-alpha 8nm Filter Set – 1.25-Inch on Sale Chroma LRGB & H-alpha 8nm Filter Set – 1.25-Inch on Sale $775.00 Original price was: $775.00.$91.00Current price is: $91.00.
  • SBIG STL to StarChaser SC-3 Adapter For Sale SBIG STL to StarChaser SC-3 Adapter For Sale $99.00 Original price was: $99.00.$79.20Current price is: $79.20.
  • Chroma H-Alpha 3nm Narrowband Filter For Fast Telescopes – 50mm Square Online now Chroma H-Alpha 3nm Narrowband Filter For Fast Telescopes – 50mm Square Online now $1,554.99 Original price was: $1,554.99.$99.00Current price is: $99.00.
  • Sky-Watcher 102mm Maksutov Cassegrain Telescope OTA For Cheap Sky-Watcher 102mm Maksutov Cassegrain Telescope OTA For Cheap $324.99 Original price was: $324.99.$95.00Current price is: $95.00.
Featured
  • Optolong SHO-SII3nm Narrowband Mounted Filter – 2″ Supply Optolong SHO-SII3nm Narrowband Mounted Filter – 2″ Supply $439.00 Original price was: $439.00.$95.00Current price is: $95.00.
  • iOptron HAE29 Strain Wave AZ/EQ Mount w/ iPolar For Sale iOptron HAE29 Strain Wave AZ/EQ Mount w/ iPolar For Sale $2,098.00 Original price was: $2,098.00.$85.00Current price is: $85.00.
  • Peterson 2-inch Tube Adapter for EyeOpener on Sale Peterson 2-inch Tube Adapter for EyeOpener on Sale $49.99 Original price was: $49.99.$45.00Current price is: $45.00.
  • Spectrum 5″ Full Aperture Glass Solar Filter- 117mm to 124mm Sale Spectrum 5″ Full Aperture Glass Solar Filter- 117mm to 124mm Sale $116.95 Original price was: $116.95.$85.00Current price is: $85.00.
Top Rated
  • Chroma LRGB & H-alpha 8nm Filter Set – 1.25-Inch on Sale Chroma LRGB & H-alpha 8nm Filter Set – 1.25-Inch on Sale $775.00 Original price was: $775.00.$91.00Current price is: $91.00.
  • SBIG STL to StarChaser SC-3 Adapter For Sale SBIG STL to StarChaser SC-3 Adapter For Sale $99.00 Original price was: $99.00.$79.20Current price is: $79.20.
  • Chroma H-Alpha 3nm Narrowband Filter For Fast Telescopes – 50mm Square Online now Chroma H-Alpha 3nm Narrowband Filter For Fast Telescopes – 50mm Square Online now $1,554.99 Original price was: $1,554.99.$99.00Current price is: $99.00.
  • Sky-Watcher 102mm Maksutov Cassegrain Telescope OTA For Cheap Sky-Watcher 102mm Maksutov Cassegrain Telescope OTA For Cheap $324.99 Original price was: $324.99.$95.00Current price is: $95.00.
CONTACT US

Please feel free to contact us if you have any problem.

Open Time: 8:00AM - 6:00PM

Company Info
  • Contact Us
  • My account
  • Track your order
Service Center
  • Term & Conditions
  • Returns & Refunds
  • Shipping Info
  • Privacy Policy
SIGN UP AND SAVE

Subscribe to get special offers, free giveaways, and once-in-a-lifetime deals.

    bg_image
    • Contact Us
    • My account
    • Track your order
    Copyright 2025 © Salelonrtg
    • Orion
    • Celestron
    • Primalucelab
    • Ioptron
    • Chroma
    • Login

    Register

    Don't have an account? Register one!

    Register an Account

    Login

    Lost your password?