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.
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.
239.00 €
Estimated delivery time : 3-4 days (valid for new orders)
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.
209.00 €
Estimated delivery time : 3-4 days (valid for new orders)
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.
169.00 €
Estimated delivery time : 3-4 days (valid for new orders)
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.
229.00 €
Estimated delivery time : 3-4 days (valid for new orders)
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.
319.00 €
Estimated delivery time : 3-4 days (valid for new orders)
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.
229.00 €
Estimated delivery time : 3-4 days (valid for new orders)
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
455.00 €
Estimated delivery time : 3-4 days (valid for new orders)
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
455.00 €
Estimated delivery time : 3-4 weeks (valid for new orders)
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
455.00 €
Estimated delivery time : 3-4 weeks (valid for new orders)
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.
149.00 €
Estimated delivery time : 1-4 days (valid for new orders)
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.
199.00 €
Estimated delivery time : 1-4 days (valid for new orders)
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
399.00 €
Estimated delivery time : 1-4 days (valid for new orders)
