Optolong

Optolong 3 nm H-Alpha Ultra - Narrow band filter for astrophotography - Shooting with extreme contrast even with strong light pollution.

• 2" mounted with filter mount
• Suitable for telescopes and lenses with focal ratios of f/3 and lower
  Blackened edges to avoid internal reflections
• Extremely narrow bandwidth of only 3 nm for maximum contrast
• Central wavelength 656 nm

Optolong 3nm OIII - Narrow band filter for astrophotography - Shooting with extreme contrast even with strong light pollution.

• 2" mounted with filter mount
• Suitable for telescopes and lenses with focal ratios of f/3 and lower
  Blackened edges to avoid internal reflections
• Extremely narrow bandwidth of only 3 nm for maximum contrast
• Central wavelength 501 nm

Optolong 3nm SII - Narrow band filter for astrophotography - Shooting with extreme contrast even with strong light pollution.

• 2" mounted with filter mount
• Suitable for telescopes and lenses with focal ratios of f/3 and lower
  Blackened edges to avoid internal reflections
• Extremely narrow bandwidth of only 3 nm for maximum contrast
• Central wavelength 672 nm

The L-Pro Astrophotography filter is a filter for improving the contrast of deep-sky objects and dampening the sky background.

• blocks UV and IR (700 - 1100 nm)
• high transmission at passband
• improved color balance for DSLRs and One-Shot Color Astro Cameras, e.g. ASI Color Cameras cooled or uncooled by ZWO.
• high optical quality
• in 1.25" filter cell
• The L-Pro Nebula filter permits roughly 3x longer exposure times than without a filter and therefore improves contrast significantly.

The L-Pro Astrophotography filter is a filter for improving the contrast of deep-sky objects and dampening the sky background.

• blocks UV and IR (700 - 1100 nm)
• high transmission at passband
• improved color balance for DSLRs and One-Shot Color Astro Cameras, e.g. ASI Color Cameras cooled or uncooled by ZWO.
• high optical quality
• in 2" filter cell
• The L-Pro Nebula filter permits roughly 3x longer exposure times than without a filter and therefore improves contrast significantly.

This dual band filter is designed to drastically reduce the effect of light pollution, it isolates the nebulae´s emissions into H-Alpha (red) and OIII (green-blue) and blocks light pollution.

• Transmits the main nebula lines at 656.3 nm and 500.7 nm with 3 nm bandpass
• Blocks light pollution and skyglow
• Designed mainly for astrophotography
• Especially suited for color cameras
• Ideal for urban areas with extreme light pollution
• Incorporates UV/IR cut filter
• Multi layers anti reflection coating
• Ultra thin filter cell maximises compatibility with filter wheels