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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

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

$239.00 - $309.00
$239.00 - $309.00
$239.00 - $309.00
$239.00

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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$239.00 - $309.00
$239.00 - $309.00
$239.00 - $309.00
$239.00
$179.00 - $259.00
$179.00 - $259.00
$179.00 - $259.00
$179.00

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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$179.00 - $259.00
$179.00 - $259.00
$179.00 - $259.00
$179.00
$289.00 - $389.00
$289.00 - $389.00
$289.00 - $389.00
$289.00

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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$289.00 - $389.00
$289.00 - $389.00
$289.00 - $389.00
$289.00
$199.00 - $199.00
$199.00
$199.00 - $199.00
$199.00

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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$199.00 - $199.00
$199.00
$199.00 - $199.00
$199.00
$309.00 - $309.00
$309.00
$309.00 - $309.00
$309.00

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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$309.00 - $309.00
$309.00
$309.00 - $309.00
$309.00
$259.00 - $259.00
$259.00
$259.00 - $259.00
$259.00

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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$259.00 - $259.00
$259.00
$259.00 - $259.00
$259.00
$569.00 - $569.00
$569.00
$569.00 - $569.00
$569.00

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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$569.00 - $569.00
$569.00
$569.00 - $569.00
$569.00
$399.00 - $399.00
$399.00
$399.00 - $399.00
$399.00

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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$399.00 - $399.00
$399.00
$399.00 - $399.00
$399.00