optolong

Achieve Critical Focus with Dim Stars Transmission >98.5% Across the Visible Spectrum λ/4 Transmitted Wavefront for Image Integrity 1.85mm B270...

Suppresses common sources of urban light pollution Enhances contrast for deep-sky objects Improves natural color balance in astrophotography Durab...

Suppresses common light pollution sources Average transmission greater than 90% on key nebula emission lines Blocks light pollution lines with >...

Blocks >99% of primary light pollution emission lines Achieves >90% average transmission on key nebula wavelengths Integrated 700-1100nm inf...

3nm Bandpass at 656nm Wavelength Maximizes Contrast for Emission Nebulae Extreme Rejection of Light Pollution and Skyglow Ion-Assisted, Anti-Refle...

Isolates the 656nm Hydrogen-alpha emission line 7nm bandpass for maximum contrast Blocks mercury vapor, sodium vapor, and natural skyglow Ideal fo...

H-alpha Filter: 7nm Bandpass centered at 656nm Oxygen-III Filter: 6.5nm Bandpass centered at 500nm Sulphur-II Filter: 6.5nm Bandpass Hubble Pa...

Complete SHO set includes H-alpha, OIII, and SII filters Ultra-narrow 3nm bandpass for maximum contrast Isolates 656nm Ha and 500nm OIII emission ...

Passes infrared light above 685nm Achieves greater than 90% average transmission Blocks wavelengths from 350-1050nm outside the passband 1.85mm th...

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...

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

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

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

Two Optolong Clip-in Light Pollution Filters in One Kit L-Pro: Multi-Bandpass Suppression Across 380-750nm UHC: >99% Blocking of Mercury and So...

Multi-Bandpass Light Pollution Suppression Effective Spectrum from 380-750nm Maintains Natural Color Balance on Broadband Targets High Transmissio...

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

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

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

L-Quad Enhance Filter: A quad-bandpass filter designed for balanced RGB color from broadband targets. L-Para Filter: A dual-narrowband 10nm filt...

Complete 5-Filter LRGB and H-Alpha Set 7nm H-Alpha Filter Centered at 656.3nm Blocks 589nm Sodium Light Pollution Line High Transmission for Natur...

Complete 4-filter LRGB set for monochrome cameras High average transmission of over 90% for maximum signal Blocks sodium light pollution at 589nm ...

Complete 7-filter set for monochrome astrophotography Includes Luminance, Red, Green, and Blue broadband filters Includes 7nm Hydrogen-alpha, 6.5n...

Blocks over 99% of common light pollution emission lines Maintains over 90% average transmission for bright, detailed views λ/4 transmitted wavefr...

Passes Infrared Light >650nm Blocks Visible Light from 300-570nm Average Transmission >90% 1.85mm Thick Optical Glass Substrate λ/4 Transmit...