IDAS NBZ-II 10nm Ha & 8nm OIII Dual Band Filter - For Select Drop-In Mount Adapters

Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
- All-in-One Target Capture: Engineered as a multi-purpose filter to enhance emission/reflection nebulae, galaxies, continuous-spectrum comet dust, and gas tails all at once.
- Comet Tail Enhancement: Features a unique passband optimized to isolate and enhance the blue-green C2 gas and CO+ plasma emissions in comet heads and ion tails.
- NIR Contrast Enhancment: Utilizes the near-infrared spectrum to penetrate heavy urban light pollution and low-altitude haze, drastically boosting image contrast.
- Natural RGB Balance: Maximizes light transmission to the sensor's blue channel to ensure rich, well-saturated colors and standard RGB balance for broad-spectrum targets.
- Filter Holder Sold Separately: DRT filter version require a compatible filter drawer or holder, which is not included.
The IDAS DRT framed filters are mounted in a 3d printed holder and designed to be inserted directly into the following ZWO filter drawers:
- Canon EF-EOSR drop-in mount adapter
- Meike MK-EFTR-C (EF-R)
- MK-EFTE-C (EF-E) drop-in mount adapters
- Kolari EF-EOS R Drop-In Filter Mount Adapter For Canon
- RED RF cameras
- More details at: IDAS DRT framed Filter
IDAS NBZ-II Filter: Precision, Compatibility, and Power in Every Focus!
The IDAS NBZ-II is the next-generation Dual Band Nebula Booster filter, building on the success of the original NBZ (NBZex). It features narrow 8nm (±0.4nm) OIII and 9.5nm (±0.4nm) H-alpha passbands, providing excellent contrast for emission nebulae while retaining the anti-halo performance that made the original NBZ so popular. To ensure quality and consistency, each NBZ-II filter includes an individual test report showing its measured optical performance.
The NBZ-II is specifically engineered to perform well with today's fast astrographs. Interference filters naturally experience a shift in their transmission curve when light enters at steep angles, a common challenge with fast optical systems. Many competing 7nm or narrower filters can lose more than 50% of their transmission when used at around f/2. In contrast, the NBZ-II retains over 80% of its transmission under the same conditions, helping preserve signal strength, contrast, and image quality even with ultra-fast imaging systems. Please note: The drop-in mounted filter holder is not included in the DRT filter purchase.
IDAS NBZ-II - Astrophotography Filter Review


Landscape Astrophotography
These days more and more people make use of IDAS DRT filters for landscape astrophotography!
Shift Simulations with Different Telescopes


Top Graph: OIII transmission w/ central obstruction systems
Bottom Graph: H-alpha transmission w/ central obstruction systems


Top Graph: OIII transmission w/ refractor telescope
Bottom Graph: H-alpha transmission w/ refractor telescope
NBZ-II Filter In Action!
Lobster Claw Nebula


Horsehead Nebula


Cone Nebula


NGC Planetary Nebula


Other Information
- Country of Manufacture: Japan
The IDAS DRT framed filters are mounted in a 3d printed holder and designed to be inserted directly into the following ZWO filter drawers:
- Canon EF-EOSR drop-in mount adapter
- Meike MK-EFTR-C (EF-R)
- MK-EFTE-C (EF-E) drop-in mount adapters
- Kolari EF-EOS R Drop-In Filter Mount Adapter For Canon
- RED RF cameras
- More details at: IDAS DRT framed Filter
IDAS NBZ-II Filter: Precision, Compatibility, and Power in Every Focus!
The IDAS NBZ-II is the next-generation Dual Band Nebula Booster filter, building on the success of the original NBZ (NBZex). It features narrow 8nm (±0.4nm) OIII and 9.5nm (±0.4nm) H-alpha passbands, providing excellent contrast for emission nebulae while retaining the anti-halo performance that made the original NBZ so popular. To ensure quality and consistency, each NBZ-II filter includes an individual test report showing its measured optical performance.
The NBZ-II is specifically engineered to perform well with today's fast astrographs. Interference filters naturally experience a shift in their transmission curve when light enters at steep angles, a common challenge with fast optical systems. Many competing 7nm or narrower filters can lose more than 50% of their transmission when used at around f/2. In contrast, the NBZ-II retains over 80% of its transmission under the same conditions, helping preserve signal strength, contrast, and image quality even with ultra-fast imaging systems. Please note: The drop-in mounted filter holder is not included in the DRT filter purchase.
IDAS NBZ-II - Astrophotography Filter Review


Landscape Astrophotography
These days more and more people make use of IDAS DRT filters for landscape astrophotography!
Shift Simulations with Different Telescopes


Top Graph: OIII transmission w/ central obstruction systems
Bottom Graph: H-alpha transmission w/ central obstruction systems


Top Graph: OIII transmission w/ refractor telescope
Bottom Graph: H-alpha transmission w/ refractor telescope
NBZ-II Filter In Action!
Lobster Claw Nebula


Horsehead Nebula


Cone Nebula


NGC Planetary Nebula


- 1x NBZ-II DRT framed filter
- All-in-One Target Capture: Engineered as a multi-purpose filter to enhance emission/reflection nebulae, galaxies, continuous-spectrum comet dust, and gas tails all at once.
- Comet Tail Enhancement: Features a unique passband optimized to isolate and enhance the blue-green C2 gas and CO+ plasma emissions in comet heads and ion tails.
- NIR Contrast Enhancment: Utilizes the near-infrared spectrum to penetrate heavy urban light pollution and low-altitude haze, drastically boosting image contrast.
- Natural RGB Balance: Maximizes light transmission to the sensor's blue channel to ensure rich, well-saturated colors and standard RGB balance for broad-spectrum targets.
- Filter Holder Sold Separately: DRT filter version require a compatible filter drawer or holder, which is not included.
The IDAS DRT framed filters are mounted in a 3d printed holder and designed to be inserted directly into the following ZWO filter drawers:
- Canon EF-EOSR drop-in mount adapter
- Meike MK-EFTR-C (EF-R)
- MK-EFTE-C (EF-E) drop-in mount adapters
- Kolari EF-EOS R Drop-In Filter Mount Adapter For Canon
- RED RF cameras
- More details at: IDAS DRT framed Filter
IDAS NBZ-II Filter: Precision, Compatibility, and Power in Every Focus!
The IDAS NBZ-II is the next-generation Dual Band Nebula Booster filter, building on the success of the original NBZ (NBZex). It features narrow 8nm (±0.4nm) OIII and 9.5nm (±0.4nm) H-alpha passbands, providing excellent contrast for emission nebulae while retaining the anti-halo performance that made the original NBZ so popular. To ensure quality and consistency, each NBZ-II filter includes an individual test report showing its measured optical performance.
The NBZ-II is specifically engineered to perform well with today's fast astrographs. Interference filters naturally experience a shift in their transmission curve when light enters at steep angles, a common challenge with fast optical systems. Many competing 7nm or narrower filters can lose more than 50% of their transmission when used at around f/2. In contrast, the NBZ-II retains over 80% of its transmission under the same conditions, helping preserve signal strength, contrast, and image quality even with ultra-fast imaging systems. Please note: The drop-in mounted filter holder is not included in the DRT filter purchase.
IDAS NBZ-II - Astrophotography Filter Review


Landscape Astrophotography
These days more and more people make use of IDAS DRT filters for landscape astrophotography!
Shift Simulations with Different Telescopes


Top Graph: OIII transmission w/ central obstruction systems
Bottom Graph: H-alpha transmission w/ central obstruction systems


Top Graph: OIII transmission w/ refractor telescope
Bottom Graph: H-alpha transmission w/ refractor telescope
NBZ-II Filter In Action!
Lobster Claw Nebula


Horsehead Nebula


Cone Nebula


NGC Planetary Nebula


Other Information
- Country of Manufacture: Japan
- 1x NBZ-II DRT framed filter

IDAS NBZ-II 10nm Ha & 8nm OIII Dual Band Filter - For Select Drop-In Mount Adapters

