Optolong L2 Dual Combo Narrow Band Filter Set 2" Mounted (OPT-L2-DUAL-COMBO-2)
AS100371
Optolong L2 Dual Combo Narrow Band Filter Set 2" Mounted (OPT-L2-DUAL-COMBO-2)
AS100371
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Product Description
L2 Dual-Combo Set includes two premium filters: one L-eXtreme and one L-Synergy.
L2 Dual-Combo Set Usage
- L-eXtreme: The L-eXtreme is a dual-narrowband filter (OIII-7nm & Ha-7nm) designed to exclusively transmit the key nebula emission lines of OIII (500.7nm) and Ha (656.3nm). By effectively blocking all other light pollution emission lines, it ensures that only the signals from OIII and Ha elements are captured during imaging, achieving maximum effective transmission.
- L-Synergy: The L-Synergy is a dual-narrowband filter (OIII-7nm & SII-7nm) that guarantees high transmission for both the SII (672.4nm) and OIII (500.7nm) spectral lines, while offering exceptional out-of-band rejection for all other wavelengths. By effectively blocking all other light pollution emission lines, it ensures that only the signals from OIII and SII elements are captured during imaging, achieving maximum effective transmission.
- With years of technological refinement, both of these filters significantly optimize the performance in suppressing bright star halos.
Design Philosophy
The core innovation of L-Synergy filters lies not in a single functional breakthrough, but rather in the precise combination of traditional dual-narrowband (Ha & OIII) technology—specifically tailored for color camera users. By adopting a dual-filter setup of "Ha & OIII + SII & OIII", it overcomes the inherent limitations of color cameras in narrowband astrophotography. With L-Synergy, users can achieve Hubble Palette-style deep-sky images comparable to those captured by monochrome SHO (SII/Ha/OIII) systems—without switching to a monochrome camera or purchasing additional SHO filters. This solution delivers high-quality results with minimal investment, making professional-level narrowband imaging accessible to all.
L2 Dual-Combo Set Advantages
The L2 Dual-Combo Set is engineered to unleash the power of Hubble Palette imaging for color camera users, supporting telescope systems as fast as F3.3, and above (slower systems). Tailored specifically for color camera astrophotographers, this set includes two premium filters: OIII & Ha (L-eXtreme), OIII &S II (L-Synergy). This innovative combination breaks through the traditional limitations of narrowband imaging with color cameras.
Without the need to switch to a monochrome camera or invest in an expensive SHO three-filter set, users can achieve stunning Hubble Palette images at a fraction of the cost and complexity. The core appeal of this combination design lies in lowering barriers and expanding possibilities for colour camera users: it preserves the equipment advantages of colour cameras while enabling users to unlock "Hubble-like" creative capabilities at minimal cost through minimalist filter combination. Simultaneously, it offers greater flexibility for astrophotography.
Whether capturing nebular detail or reproducing deep-sky colours, this combination enables richer creative expression, truly unlocking the full potential of colour cameras in deep-sky photography.
Spectrum and Characteristic
- Substrate: B270
- Thickness: 1.85mm
- FWHM: SII 7nm / OIII 7nm / Ha 7nm
- Tpeak: T>85%
- Blocking range: 300-1050nm
- Surface quality: 60/40
- Transmitted Wavefront RMS: λ/4
- Parallelism: 30s
Warm Prompt
- Regarding Color: Due to environmental lighting, display color variations, and flash photography, the product's color may differ slightly. Please refer to the actual product for the most accurate representation.
- Regarding Coating: The interference filter may display different colors under varying lighting conditions, which is normal. Please refer to the actual product for the most accurate representation.
- Regarding Design: To improve the product, design, appearance, or specifications may be subject to changes that are not immediately reflected in updates. Please refer to the actual
product for the most accurate representation. - Regarding Description: This product series shares the same materials, craftsmanship, and design—only the sizes vary.
What's in the Box
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