BAADER 2961680 Ultra Narrowband Cmos Optimized Filter Set 4047825104106 Ha/o Iii/s 1.25 3.5/4MM

( Brand: Baader ), ( Manufacturer Part Number: 2961680 ), ( Size: 1.25 In ), ( Compatible Brand: For Baader ), ( Type: Color ), ( Compatible Series: Universal ), ( UPC: 047825104106 )

Review BAADER Ultra Narrowband 1.25 Inch Cmos Optimized 3.5/4mm Ha/o-iii/s-ii Filter Set

The Baader Planetarium 2961680 Ultra Narrowband (UNB) 1.25" Filter Set is an exceptional accessory designed for astrophotography enthusiasts and advanced imagers. This filter set, optimized for H , OIII, and SII emission lines, is meticulously crafted to enhance the contrast and detail in deep-sky images.

The H filter, with a transmission peak at 656.3nm, is engineered to isolate this emission line, which is predominantly produced by hydrogen clouds in nebulae. This filter effectively blocks out unwanted light, allowing you to capture the intricate structures and delicate details of H -rich objects, such as the Orion Nebula and the Swan Nebula, with remarkable clarity.

The OIII filter, with transmission peaks at 495.9nm and 500.7nm, is designed to isolate the OIII emission lines, which are generated by oxygen ions. These lines are essential for imaging the intricate details of emission nebulae, such as the glowing structures within the Orion Nebula and the delicate filaments of the Veil Nebula. This filter effectively blocks out unwanted light, enabling you to capture the finest details in your images.

The SII filter, with a transmission peak at 672.8nm, isolates the Sulfur II emission line, which is produced by sulfur ions. This filter is essential for capturing the subtle details and intricate structures in emission nebulae, such as the dark filaments in the North American Nebula and the delicate structures in the Lagoon Nebula. Like the other filters in the set, the SII filter effectively blocks out unwanted light, ensuring that the captured data is of the highest possible quality.

Each filter in the Baader Planetarium 2961680 UNB 1.25" Filter Set is made from high-quality, optical-grade Schott glass, ensuring excellent optical properties and minimal color contamination. The filters are also multi-coated with Baader's proprietary hard-coating, which provides additional protection against scratches and other damage.

The filters are designed with a 3.5mm central obstruction and a 4mm edge thickness, making them suitable for use with most 1.25" imaging systems. The set also includes Baader's patented OIII narrowband UV/IR blocking filter, which ensures that no unwanted UV or IR light enters your imaging system, further enhancing the overall image quality.

In summary, the Baader Planetarium 2961680 Ultra Narrowband 1.25" Filter Set is an essential accessory for astrophotography enthusiasts and advanced imagers, offering exceptional performance and unparalleled image quality. The set's H , OIII, and SII filters are meticulously designed and crafted to isolate the specific emission lines required for capturing the finest details and structures in deep-sky objects, while the high-quality materials and coatings ensure that the filters provide excellent optical properties and durability.

The Baader Planetarium 2961680 Ultra Narrowband (UNB) 1.25" CMOS Optimized 3.5/4mm Ha/O-III/S-II Filter Set is designed for astrophotography enthusiasts and professional astronomers who specialize in narrowband imaging. Let's discuss some pros and cons of this filter set.

1. Superb Optical Quality: Baader filters are renowned for their excellent optical quality, ensuring sharp and clear images.

2. Narrowband Filters: The set includes three narrowband filters for Ha (Hydrogen-alpha), O-III (Oxygen-III), and S-II (Sulphur-II), which are crucial for capturing the rich details in nebulae and emission regions.

3. CMOS Optimization: The filters are specifically designed for CMOS sensors, which are increasingly popular in astrophotography due to their high sensitivity and wide dynamic range.

4. Light Pollution Reduction: Narrowband filters significantly reduce the impact of light pollution, allowing you to capture deep-sky objects even under less-than-ideal conditions.

5. Versatile: The filters can be used with various telescope sizes and configurations, making them a versatile addition to any astrophotography setup.

1. Cost: The Baader UNB filter set is relatively expensive compared to other filter sets on the market.

2. Requires Specific Camera Settings: Proper camera settings are crucial to obtain optimal results with narrowband filters. This may require some experimentation and adjustments.

3. Limited Light Gathering Capability: Narrowband filters allow only specific wavelengths of light to pass through, which may limit the overall light-gathering capability compared to broadband filters.

The Baader Planetarium 2961680 Ultra Narrowband 1.25" CMOS Optimized 3.5/4mm Ha/O-III/S-II Filter Set is an excellent investment for astrophotographers seeking the highest possible image quality and detail in their deep-sky images. While the cost may be a significant barrier, the superior optical quality, narrowband capabilities, and CMOS optimization make it a worthwhile investment for dedicated astrophotography enthusiasts and professionals.

If you are serious about deep-sky astrophotography and are looking for the best possible image quality and detail, the Baader Planetarium 2961680 Ultra Narrowband 1.25" CMOS Optimized 3.5/4mm Ha/O-III/S-II Filter Set is a recommended purchase. However, it is essential to consider the investment carefully and ensure that it fits within your budget and astrophotography goals.

Details:

Optimized for modern CMOS cameras, but likewise excellent CCD camera technologies. 3.5 / 4 NM FWHM to harmonize the exposure time from H-alpha with O-III S-II, recommended for extremely fast optical systems Specially designed special filter requirements when used f/2 optics like Palestrina RASA historiographers. Mounted in Baader Low Profile Filter Cell LPFC 6mm height . Reflex-Blocker hard coated and plane optically polished with sealed coating edges.

Baader 3.5/4nm f/2 Ultra-High speed-Filter-Set 1 CMOS-optimized H-alpha / O-III S-II Mfg#: 2961680. Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim. For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail indispensable under Bottle 9/8/7/ 6 skies.

part #: 2961680 price

• $550.00

specifications telesfil:

• brand: Baader
• mpn: 2961680
• size: 1.25 In
• compatible brand: For Baader
• type: Color
• compatible series: Universal
• upc: 047825104106

payments telesfil:

• credit card: Visa
• wallet: Paypal
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seller telesfil:

• rating: 100.0%
• city: Folsom, California
• # reviews: 894

general telesfil:

• condition: Open box
• Binoculars Telescopes > Telescope Parts Accessories > Telescope Filters

returns telesfil:

• policy: No Returns

offer telesfil:

• started: July 19, 2025
• availability: In Stock
• sold: 0
• best offers: True
• options: Ship-to-home
• quantity: 1

shipping telesfil:

• carrier: USPS
• transit: 4-9 Days
• class: Standard
• type: Calculated
• cost: $0.00
• service: USPS Ground Advantage

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