Optolong

High-End filters for Amateur Astronomy

Optolong develops modern filters for astrophotography with precise filter curves. APM-Telescopes offers very good prices by direct import from the manufacturer.

View as Grid List
Sort by
Display
The L-eXtreme is a two-band filter and the ideal choice for strong light pollution suppression. It allows astrophotography of objects with narrow-band emission in the O-III and H-alpha lines out of the city.
183.19 €
Delivery date : 3-4 days
The L-eNhance is a tri band filter and the ideal choice for enhanced light pollution suppression. It allows astrophotos to be taken of narroband emission objects in O-III, H-Beta and H-Alpha lines out of the city.
158.82 €
Delivery date : 3-4 days
The L-Pro Filter is the best choice for light pollution suppression and allows astrophotos to be taken of broadband emission objects such as galaxies, reflection nebulae and globular star clusters.
129.41 €
Delivery date : 3-4 days
The L-eNhance is a tri band filter and the ideal choice for enhanced light pollution suppression. It allows astrophotos to be taken of narroband emission objects in O-III, H-Beta and H-Alpha lines out of the city.
175.63 €
Delivery date : 3-4 days
The L-eXtreme is a two-band filter and the ideal choice for strong light pollution suppression. It allows astrophotography of objects with narrow-band emission in the O-III and H-alpha lines out of the city.
259.66 €
Delivery date : 3-4 days
The L-Pro Filter is the best choice for light pollution suppression and allows astrophotos to be taken of broadband emission objects such as galaxies, reflection nebulae and globular star clusters.
171.43 €
Delivery date : 3-4 days

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
382.35 €
Delivery date : 3-4 days

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
382.35 €
Delivery date : 3-4 weeks

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
382.35 €
Delivery date : 3-4 weeks

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.
108.40 €
Delivery date : 1-4 days

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.
150.42 €
Delivery date : 1-4 days

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
323.53 €
Delivery date : 1-2 weeks