• The best visual and photographic filter for contrast enhancement for all telescopes, without loss of image brightness!
• The effect of the element neodymium as filter material is very impressive. When added to optical glass, it enhances contrast, enhances the red colour in the image (especially with Mars and Jupiter) and it darkens the spectral region which is particularly marked by street lamp light, which is the biggest contributor to the nightly "Skyglow".
• Planoptically polished and MC-coated – with IR-cut coatings!, without any loss of sharpness as a single filter in front of a binocular or be used for afocal projection with digital cameras (far from the focal point!)
• The IR spectral range is blocked making stars much sharper when used with dSLRs.

• The best visual and photographic filter for contrast enhancement for all telescopes, without loss of image brightness!
• The effect of the element neodymium as filter material is very impressive. When added to optical glass, it enhances contrast, enhances the red colour in the image (especially with Mars and Jupiter) and it darkens the spectral region which is particularly marked by street lamp light, which is the biggest contributor to the nightly "Skyglow".
• Planoptically polished and MC-coated – with IR-cut coatings!, without any loss of sharpness as a single filter in front of a binocular or be used for afocal projection with digital cameras (far from the focal point!)
• The IR spectral range is blocked making stars much sharper when used with dSLRs.

• 1¼" Contrast Booster Filter that completely eliminates false color
• Removes the bluish "hue" (=lack of contrast) during lunar, planetary, solar and terrestrial observation
• Boosts contrast and sharpness for fast achromatic telescopes - with over 95% transmission
• Planeoptically polished, non-ageing sealed coating edges

• 1¼" Contrast Booster Filter that completely eliminates false color
• Removes the bluish "hue" (=lack of contrast) during lunar, planetary, solar and terrestrial observation
• Boosts contrast and sharpness for fast achromatic telescopes - with over 95% transmission
• Planeoptically polished, non-ageing sealed coating edges

• Premium grade H-alpha interline chip CCD-filter for fast optical systems f/10 to f/2.8
• IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• Premium grade H-alpha interline chip CCD-filter for fast optical systems f/10 to f/2.8
• IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• Premium grade H-alpha full frame chip CCD-filter for fast optical systems f/10 to f/2.8
• IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• ultra hard and bright O-III visual contrast for 6" and larger telescopes
• no visual color fringing, just pure O-III
• non-ageing sealed coating edges

• ultra hard and bright O-III visual contrast for 6" and larger telescopes
• no visual color fringing, just pure O-III
• non-ageing sealed coating edges

• 4 filters L-RGB
• Ultra high contrast impermeable RGB-Filter, IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• 4 filters L-RGB
• Ultra high contrast impermeable RGB-Filter, IR-blocked
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

• Blocks UV below 400nm and IR above 680nm
• Maximum transmission, scratchproof hard coated
• non-ageing sealed coating edges

• Safe solar observation! 100% UV-protection, 100% IR-protection, sun light intensity reduced by 99,999%
• Our Solar Viewer AstroSolar® Silver/Gold – MADE IN GERMANY – safely protect your eyes for visual solar observation. This is THE solution to see the partial phase of Solar Eclipses or even big sunspots with your own eyes!
• Consists of Baader AstroSolar® Silver/Gold Film, with eye-sided reflex-free viewing. Also blocks IR, thus no unpleasant feeling of warmth in the eyeball. Optical Density OD=5,0 
• CE / ISO certified: conforms to and meets the transmission requirements for eye safety: EN ISO 12312-2:2015 – Instructions in four languages (English, German, French, Spanish) on the inner side of the solar viewer

Bester H-alpha-Linienfilter für die Astrofotografie von Emissionsnebeln mit höchstem Kontrast und der Wiedergabe zartester Nebeldetails.

♦ schmalbandiger (<=7 nm) Linienfilter für wichtige Nebellinie
♦ bevorzugt für CDD-Kameras mit Full-Frame-Transfer-Technik
♦ 2 mm dick und somit homofokal mit vielen anderen Filtern von Optolong
♦ Interferenzfilter
♦ feinoptisch poliert
♦ mehrschichtig hartvergütet - reflexfrei und weitgehend kratzfest

EOS Clip version of the famous L-eNhance filter by Optolong

Optolong L-eNhance is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and monochrome CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers superb images.

The advantage of the L-eXtreme filter is that there is no transmission between the H-beta and OIII lines, as there is no nebula emission lines there. In this case, it isn't letting light pollution come through so that maximize nebulas signal and make the sky background darker while imaging. The L-eXtreme filter should better isolate the emission lines only and better protect from light pollution.

The advantage of the L-eXtreme filter is that there is no transmission between the H-beta and OIII lines, as there is no nebula emission lines there. In this case, it isn't letting light pollution come through so that maximize nebulas signal and make the sky background darker while imaging. The L-eXtreme filter should better isolate the emission lines only and better protect from light pollution.