Filters

• Tool for tension-free mounting and dismounting of hard-to-reach 2" Baader filters with milled grip crown.
• Suitable for all mounted Baader 2" filters with Low Profile Filter Cell (LPFC) - fit not guaranteed for older filters. Not suitable for filters of other manufacturers without grip crown or with unknown mount diameters.
• Included with the  Baader 2" Cool-Ceramic Safety Herschel Prism Mark II – (Visual / Photo) (various versions available) . This tool was originally developed for the Baader Herschel prism to make it easier to replace the installed filters.

• Baader S-II f/2 Highspeed Filter – Precision Grade
• 6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 and faster
• Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader O-III f/2 Highspeed Filter – Precision Grade
• 6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 and faster
• Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader H-alpha f/2 Highspeed Filter – Precision Grade
• 6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 and faster
• Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader S-II Ultra-Narrowband Filter – Premium Grade
• 4 nm FWHM, recommended for optical systems from > f/3.4
• For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail – indispensable under Bortle 9/8/7/(6) skies
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader O-III Ultra-Narrowband Filter – Premium Grade
• 4 nm FWHM, recommended for optical systems from > f/3.4
• For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail – indispensable under Bortle 9/8/7/(6) skies
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader H-alpha Ultra-Narrowband Filter – Premium Grade
• 3.5 nm FWHM (to harmonize the exposure time with O-III / S-II), recommended for optical systems from > f/3.4
• For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail – indispensable under Bortle 9/8/7/(6) skies
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

We explicitly warn against observing the sun with a DeepSky 3.5 nm (equivalent to 35 Ångstroem) H-alpha narrowband filter, specialized solar chromosphere and prominence filters from SolarSpectrum start at 0.8 Ångstroem. Photographic experiments with a camera are theoretically possible, but by no means observe the sun with naked eyes – you endanger your eyesight!

• Baader S-II Narrowband Filter – Precision Grade
• 6.5 nm FWHM, recommended for optical systems from > f/3.4
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader O-III Narrowband Filter – Precision Grade
• 6.5 nm FWHM, recommended for optical systems from > f/3.4
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader H-alpha Narrowband Filter – Precision Grade
• 6.5 nm FWHM, recommended for optical systems from > f/3.4
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

We explicitly warn against observing the sun with a DeepSky 6.5 nm (equivalent to 65 Ångstroem) H-alpha narrowband filter, specialized solar chromosphere and prominence filters from SolarSpectrum start at 0.8 Ångstroem. Photographic experiments with a camera are theoretically possible, but by no means observe the sun with naked eyes – you endanger your eyesight!

• versatile filter changer, very easy and inexpensive modifiable - when changing telescope or camera
• largest telescope-sided diameter of 65mm (depends on telescope-sided connection adapter such as "RASA"
• Filter changer availble for mounted 2" filters (max. 6mm height - LPFC), as well as unmounted 50.4mm round and 50x50 square filters
• multiple accessories (extensions, stray light flange) as well as telescope-sided and camera-sided adapters available. Combine your Baader-UFC here...

• Baader Neutral Density Filters ND 0.6 / 0.9 / 1.8 / 3.0.
• For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
• If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
• Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
• Phantom Group coated. No ghosting, reflections or stray light.
• Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).

• Baader Premium grade impermeable RGB-C Clearglass Filters.
• The Baader clear glass filters are used to focus a camera when using very narrow band line filters (due to same mechanical thickness).
• Alternative function: e.g. our Protective Canon EOS T-Ring uses a clear glass filter for dust protection
• NO halos, NO reflections, NO ghosting
• non-ageing sealed coating edges

Please note: We have not planned to produce also a CMOS-optimized version of this clear filter because there is no necessity to do so. Our 7-layer BBAR(BroadBandAntiReflection) -coatings on both sides of the glass-substrate cannot be essentially improved.

• 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

• Baader U-Filter (Venus and UV) 350nm.
• Transmission peak approx. 80% at 350nm, bandwidth 60nm (320-380nm), completely blocking the entire spectral range from 200nm to 1120nm.
• Dielectric multi-coating on optically polished Schott Glass.
• Enables imaging in the deep UV spectral region. A "breakthrough" for imaging the planet Venus! Allows amateur astronomers to capture cloud structures of the Venusian atmosphere.
• Successful astro-application of this filter requires a suitable UV-sensitive lucky imaging camera module (i.e. SKYRIS 274M) with at least a telescope of 5" diameter (a telescope with an 8" diameter is recommended).
• Non-astronomical applications possible: e.g. check for paint damage on cars or state of health of plants and much more. Read more in the detailed description or with a translate tool on this (german) test review: Baader-U" in the "terrestric" Photography

• Baader IR-Pass Filer HWB 685nm
• Reduces the effect of seeing resulting in a much sharper image.
• Tip for use: Ideal for imaging and used for the luminosity channel.
• The effect of use: The normal spectral bandwidth is 400-700nm. This filter starts at 670nm in the deep red, just in the visual range so it can be focussed correctly. At this long-wavelength spectral range the atmospheric air turbulence (seeing) has much lower impact on the sharpness. Dark structures on Mars, Jupiter the Moon and the Sun are thereby rendered much sharper. The luminosity can then be combined with RGB creating a very sharp LRGB image.
• Highly recommended for any planetary imager.
• Reflex free anti-reflective and optically polished.

• Baader H-alpha f/2 Ultra-Highspeed Filter – Premium Grade
• 3.5 nm FWHM (to harmonize the exposure time with O-III / S-II), recommended for extremely fast optical systems from < f/2.3
• Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
• For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail – indispensable under Bortle 9/8/7/(6) skies
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader O-III f/2 Ultra-Highspeed Filter – Premium Grade
• 4 nm FWHM, recommended for extremely fast optical systems from < f/2.3
• Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
• For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail – indispensable under Bortle 9/8/7/(6) skies
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

• Baader S-II f/2 Ultra-Highspeed Filter – Premium Grade
• 4 nm FWHM, recommended for extremely fast optical systems from < f/2.3
• Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
• For highest contrast even at strongest light pollution, minimizes star size, emphasizes finest nebula detail – indispensable under Bortle 9/8/7/(6) skies
• Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
• Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
• Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies