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Optolong Dual-Band Filters

Optolong dual-band filters isolate two or more emission lines at once, which lets one-shot color cameras record nebulae through heavy light pollution or moonlight. The collection includes the Ha/OIII L-Para 10nm, L-Extreme 7nm and L-Ultimate 3nm, the SII/OIII L-Synergy 7nm, and the multi-band L-Enhance and L-Quad Enhance.

Narrower bands give more contrast from the city but need longer exposures. Dual-Combo sets pair two filters to cover Ha, OIII and SII.

Filters

CA$335.00 - CA$432.00
CA$335.00 - CA$432.00
CA$335.00 - CA$432.00
CA$335.00

Optolong L-Extreme Filter

Options available
8 variants in stock

Narrow dual-bandpass filter for H-Alpha and OIII Blocks >99% of light pollution emission lines Peak transmission of >90% at critical wavelen...

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CA$335.00 - CA$432.00
CA$335.00 - CA$432.00
CA$335.00 - CA$432.00
CA$335.00
CA$251.00 - CA$363.00
CA$251.00 - CA$363.00
CA$251.00 - CA$363.00
CA$251.00

Optolong L-Enhance Filter

Options available
7 variants in stock

Dual-bandpass filter isolates H-Alpha, H-Beta, and OIII emission lines Peak transmission of over 90% for maximum signal Blocks over 99% of light p...

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CA$251.00 - CA$363.00
CA$251.00 - CA$363.00
CA$251.00 - CA$363.00
CA$251.00
CA$404.00 - CA$545.00
CA$404.00 - CA$545.00
CA$404.00 - CA$545.00
CA$404.00

Optolong L-Ultimate Ha/OIII 3nm Filter

Options available
14 variants in stock

Dual 3nm bandpass isolates Hydrogen-alpha and Oxygen-III emission lines Blocks light pollution across the 300-1000nm spectrum Greater than OD4 blo...

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CA$404.00 - CA$545.00
CA$404.00 - CA$545.00
CA$404.00 - CA$545.00
CA$404.00
CA$278.00 - CA$278.00
CA$278.00
CA$278.00 - CA$278.00
CA$278.00

Optolong L-Quad Enhance Filter

OPT-14702
3 in stock

Quad-bandpass design for color cameras Suppresses light pollution with OD2-OD4 blocking depth Maintains sharpness with a λ/4 transmitted wavefront...

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CA$278.00 - CA$278.00
CA$278.00
CA$278.00 - CA$278.00
CA$278.00
CA$432.00 - CA$432.00
CA$432.00
CA$432.00 - CA$432.00
CA$432.00

Optolong L-Synergy 7nm SII/OIII Dual Narrowband Filter

OPT-LSYNERGY
3 in stock

Captures Sulfur-II and Oxygen-III Emission Lines Simultaneously Engineered for Hubble Palette (SHO) Imaging with Color Cameras Strict 7nm Bandpass...

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CA$432.00 - CA$432.00
CA$432.00
CA$432.00 - CA$432.00
CA$432.00
CA$362.00 - CA$362.00
CA$362.00
CA$362.00 - CA$362.00
CA$362.00

Optolong L-Para HA/OIII 10nm Filter - 2"

OPT-AS100221
5 in stock

Dual Narrowband H-Alpha & OIII Filter Suppresses Mercury, Sodium & LED Light Pollution Optimized for Fast-Ratio Systems (RASA, HyperStar) ...

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CA$362.00 - CA$362.00
CA$362.00
CA$362.00 - CA$362.00
CA$362.00
CA$796.00 - CA$796.00
CA$796.00
CA$796.00 - CA$796.00
CA$796.00

Optolong L-Extreme + L-Synergy L2 Dual-Combo Filter Set - 2"

OPT-L2-COMBO
3 in stock

Includes L-eXtreme (H-alpha + OIII) and L-Synergy (SII + OIII) filters Enables Hubble Palette (SHO) imaging with one-shot color cameras Captures t...

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CA$796.00 - CA$796.00
CA$796.00
CA$796.00 - CA$796.00
CA$796.00
CA$558.00 - CA$558.00
CA$558.00
CA$558.00 - CA$558.00
CA$558.00

Optolong L-Quad Enhance + L-Para L1 Dual-Combo Filter Set - 2"

OPT-L1-SET
3 in stock

L-Quad Enhance Filter: A quad-bandpass filter designed for balanced RGB color from broadband targets. L-Para L1 Filter: A dual-narrowband filter...

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CA$558.00 - CA$558.00
CA$558.00
CA$558.00 - CA$558.00
CA$558.00