H-alpha
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# 1363056
ā¬ 3,545.00 Price excl. German VAT tax (19%): ā¬ 2,978.99- Silently heated H-alpha-Filter with integrated 3x telecentric system with 2nm block filter.
- Half-width (FWHM) of 0.6±0.1Å at an effective focal ratio of f/30
- Resistant to ageing: The dielectric coating of the blocking filter and the airtight storage of the SolarSpectrum Etalon filter in oil prevent the ageing process
- The complete disk of the sun as well as prominences are visible in telescope with focal lengths up to about 600mm
- shows prominences and solar surface details for visual observations as well as for photography and bino-viewers
- For telescope with 80mm aperture or less, no additional D-ERF (energy rejection filter) is necessary
- Userfriendly electrical temperature control; additional micrometer screw for observiong fast changes in the blue wing of the H-alpha-line
- Nosepiece: 2", 1,25"
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# 1363080
ā¬ 385.00 Price excl. German VAT tax (19%): ā¬ 323.53- Delivers a plane-parallel, achromatic beam of light with 36 mm diameter
- Designed especially for H-alpha and CaK subangstroem etalon filters
- Includes a ½" filter cell for the 2 nm block filter of the Baader SunDancer II H-alpha filter
- Can also be used in place of a Barlow lens, expands the telescope focal length by 4x
- BBAR (Broad-Band Anti-Reflection) coating
- Anti-reflective thread and blackened lens edges against reflections and for maximum contrast
- Image circle 36 mm, in a nominal in 97 mm from base of the T-2 thread
- 1¼" and 2" nosepiece with 1¼" filter thread, T-2 thread on camera side
- 12.5 mm (1/2") filter exchange tool included
- 5-year warranty if handled properly
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From: ā¬ 315.00 Price excl. German VAT tax (19%): ā¬ 264.71
- D-ERF (Dielectric Energy Reflection Filter) in different sizes
- Pre-filter to reduce heat during H-alpha observation with SolarSpectrum Filters
- Plane parrallel plate (without filter cell) with IR-Cut dielectric coating
- non-ageing sealed coating edges
- Half-Band-Width (HBW): 80 nm – see also graph
- Filter WITHOUT cell – 3D-printed filter cells - customized for your telescope, can be ordered in addition (not available as standalone product)
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From: ā¬ 400.00 Price excl. German VAT tax (19%): ā¬ 336.13
- Filter Frame for D-ERF Filter, Diameter 75 - 180 mm
- No serial production - every filter frame will be adapted to your needs and professionally produced on our in-house 3D-printer (70-160 mm) or are CNC machined Aluminium (180 mm)
- Filter frame offers complete safe and firm hold for the delicate D-ERF energy reflection filters
- Only available in combination with Solar Spectrum H-alpha Filters and D-ERF Filters
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# 2459300
ā¬ 366.00 Price excl. German VAT tax (19%): ā¬ 307.56- Steplessly variable, white anodized and heat reflecting diaphragm from 13- to 113 Millimeter for our D-ERF Filters
- For optimum adjustment of a telescope aperture when observing with an H-alpha filter of Solar Spectrum (also suitable for other brands)
- The diaphragm has four telescope-sided M3-threads on a pitch circle radius of 60 mm to fasten also on a DIY-holder.
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# 1363070
ā¬ 365.00 Price excl. German VAT tax (19%): ā¬ 306.72- Achromatic 3x telecentric system
- Usable for H-alpha observation with frame for the block filter of the Baader SunDancer II H-alpha Filter (#1363056 , ā¬ 3545,-)
- Can be used in place of a Barlow lens
- Four-lens optical design, BBAR (Broad-Band Anti-Reflection) coating
- Anti-reflective thread and blackened lens edges against reflections and for maximum contrast
- Image circle 27.5mm in 96 mm distance to T-2 threaded base
- 1¼" and 2" nosepiece with 1¼" filter thread, T-2 thread on camera side
- The optical design places the telescope's focal point 28 mm behind the end of the 1¼" nosepiece
- 5-year warranty if handled properly
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# 2459257
ā¬ 445.00 Price excl. German VAT tax (19%): ā¬ 373.95- Research Grade Telecentric Unit, featuring an oversized pick up expanding lens set and 2" (50.8mm) threads on both sides – T-2 Adapter and 2" m/f inverter ring are both included as standard accessories
- 46mm clear aperture at the H-alpha-filter entrance side - suitable for research grade SolarSpectrum H-alpha filters
- Large working distance of 250mm for optimized focal length reduction with a telecompressor and suitable room for adapting a binocular viewer
- Aplanatic, with 3x focal length extension to achieve a parallel f/30 beam in conjunction with ~f/10 optics systems – free of field curvtare
- Primarily calculated and produced for H-alpha at 656,3 nm, delivering 99% Strehl (definition brightness) depending on the used telescope system
- Diffraction limited design with about 80% Strehl also at 396 nm (CaK)
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# 2459256
ā¬ 387.00 Price excl. German VAT tax (19%): ā¬ 325.21- Telecentric with 2" outer diameter and T-2 threads on both sides
- Aplanatic, with 4x focal length extension to achieve a parallel f/30 beam in conjunction with ~f/7,5 optics systems – free of field curvtare
- Primarily calculated and produced for H-alpha at 656,3 nm, delivering maximum Strehl (definition brightness)
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# 2459260
ā¬ 366.00 Price excl. German VAT tax (19%): ā¬ 307.56- Alike the TZ-3 telecentric, also the RG 0.4x Telecompressor features 46mm clear aperture throughout, perfectly suitable even for large SolarSpectrum RG46 Research Grade H-alpha Filters
- Working distance: 74mm (Distance to the camera sensor), optimized for videography and full solar disc imaging. Ć 16 mm corrected image field in conjunction with the TZ-3
- mounts straight onto the body of the SolarSpectrum filter and reduces f/30 f/ratio back to f/10, thanks to the factor of 0.4
- 2" male threads on both sides, fitting the SolarSpectrum Universal Flange Adapter #2958240 (included as standard on both sides of the SolarSpectrum H-alpha filters)
- The RG 0.4x Telecompressor serves to adjust the focal length in order to improve poor seeing conditions and / or to enlarge the field of view for photographic- or lucky imaging applications
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# 2459259
ā¬ 313.00 Price excl. German VAT tax (19%): ā¬ 263.03- gets mounted eyepiece-sided directly onto the SolarSpectrum filter and reduces the previously by the telecentric system extended focal length again by a factor of 0.7
- Working distance: 110mm (Distance to the camera sensor)
- 2" male threads on both sides, fitting Universal Flange Adapter #2958240 (included with SolarSpectrum H-alpha filters
- Telecompressor is used to adjust the focal length to possibly poor seeing conditions and / or enlarging the field for photographic- or webcam applications
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From: ā¬ 4,195.00 Price excl. German VAT tax (19%): ā¬ 3,525.21
- Triband-SCT's are available in apertures of 8", 9¼" and 11".
- Triband-ERF-coated Schmidt corrector plate replaces an additional ERF energy rejection filter and makes high-resolution observations of the sun possible
- The Triband-ERF Schmidt corrector plate has got transmission windows between 380 and 400 nm, 480 and 515nm as well as 630 and 680 nm. The transmission windows are designed for Calcium-K, Continuum (incl H-beta and O III), H-alpha and S II.
- For observing the sun in white light, H-alpha or CaK or for Narrowband-Deep-Sky-applications, furtehr filters are required.
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# 2903300
ā¬ 318.00 Price excl. German VAT tax (19%): ā¬ 267.23- Using this device, you can check instantaneously the seeing value in arc seconds at your specific location
- Shows instant seeing value, light input and 1 minute moving average
- Separate sensor can be placed next to the entrance pupil of your instrument
- Runs on battery or USB
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# 1363018
ā¬ 7,350.00 Price excl. German VAT tax (19%): ā¬ 6,176.47- Research Grade Filter RG 18: 18mm clear aperture, selected quality with extremely uniform H-alpha image over the entire image field
- Halfbandwidth 0.30 + 0.10/- 0.05 Angström
- Focal ratio: f40 +10/-5
- incl. Pre-mounted Adapterset: (2x 2" Universal flange - suitable for Solar Spectrum Filter (#2958240 , ā¬ 39,-) , 1x Baader Expansion Ring 2"a/T-2i with 1mm optical path length (T-2 part #28) (#2958242 , ā¬ 25,-) , 1x Baader Adapter 2" (male) / T-2 (male) (#1508035 , ā¬ 41,-) , 2 pc. T-2 Dust caps ( Baader Male T-2 Dustcap, outer thread M42 x 0,75 (#2904000 , ā¬ ā¬ 6.50) , Baader Female T-2 Dustcap, inner thread M42 x 0,75 (#2904010 , ā¬ ā¬ 6.50) )
- Heated H-alpha – Filter (lambda = 656,3 nm) with electronical temperature control (heating and cooling combined).
- Requires an additional Energy Rejection Filter (D-ERF) in front of the lens. SolarSpectrum Filter are not available by shopping cart system and have sometimes long waiting periods. If you are interested, please contact us by email or contact form
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From: ā¬ 4,050.00 Price excl. German VAT tax (19%): ā¬ 3,403.36
- Solar Observer Filter Serie 1,5: Standard-Filter with a clear aperture of 25mm. Shows the full sun disc up to effective focal lengths of approx. 2200mm
- Different Halfbandwidths available – please choose "Version"
- incl. Pre-mounted Adapterset: 2x 2" SolarSpectrum Universal Flange #2958240, 1x 2"a to T-2i Reducer #2958242, 1x 2"a to T-2a Adapter #1508035, 2 pc. T-2 Dust caps (#2904000, #2904010)
- Heated H-alpha – Filter (lambda = 656,3 nm) with electronical temperature control (heating and cooling combined).
- Requires an additional Energy Rejection Filter (D-ERF) in front of the lens. SolarSpectrum Filter are not available by shopping cart system and have sometimes long waiting periods. If you are interested, please contact us by email or contact form
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From: ā¬ 5,780.00 Price excl. German VAT tax (19%): ā¬ 4,857.14
- Advanced Solar Observer Filter: Standard-Filter with a clear aperture of 32mm. Shows the full sun disc up to effective focal lengths of approx. 2700mm
- Different Halfbandwidths available – please choose "Version"
- incl. Pre-mounted Adapterset: 2x 2" SolarSpectrum Universal Flange #2958240, 1x 2"a to T-2i Reducer #2958242, 1x 2"a to T-2a Adapter #1508035, 2 pc. T-2 Dust caps (#2904000, #2904010)
- Heated H-alpha ā Filter (lambda = 656,3 nm) with electronical temperature control (heating and cooling combined).
- Requires an additional Energy Rejection Filter (D-ERF) in front of the lens. SolarSpectrum Filter are not available by shopping cart system and have sometimes long waiting periods. If you are interested, please contact us by email or contact form
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From: ā¬ 7,210.00 Price excl. German VAT tax (19%): ā¬ 6,058.82
- Research Grade Filter RG 32: 32mm clear aperture, selected quality with extremely uniform H-alpha image over the entire image field
- Different Halfbandwidths available – please choose "Version"
- incl. Pre-mounted Adapterset: 2x 2" SolarSpectrum Universal Flange #2958240, 1x 2"a to T-2i Reducer #2958242, 1x 2"a to T-2a Adapter #1508035, 2 pc. T-2 Dust caps (#2904000, #2904010)
- Heated H-alpha – Filter (lambda = 656,3 nm) with electronical temperature control (heating and cooling combined).
- Requires an additional Energy Rejection Filter (D-ERF) in front of the lens. SolarSpectrum Filter are not available by shopping cart system and have sometimes long waiting periods. If you are interested, please contact us by email or contact form
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From: ā¬ 10,750.00 Price excl. German VAT tax (19%): ā¬ 9,033.61
- Research Grade Filter RG 46: 46mm clear aperture, selected quality with extremely uniform H-alpha image over the entire image field
- Different Halfbandwidths available – please choose "Version"
- incl. Pre-mounted Adapterset: 2x 2" SolarSpectrum Universal Flange #2958240, 1x 2"a to T-2i Reducer #2958242, 1x 2"a to T-2a Adapter #1508035, 2 pc. T-2 Dust caps (#2904000, #2904010)
- Heated H-alpha – Filter (lambda = 656,3 nm) with electronical temperature control (heating and cooling combined).
- Requires an additional Energy Rejection Filter (D-ERF) in front of the lens. SolarSpectrum Filters are not available by shopping cart system and have sometimes long waiting periods. If you are interested, please contact us by email or contact form
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# 2459247
ā¬ 111.00 Price excl. German VAT tax (19%): ā¬ 93.28- Required to use the Steplessly variable diaphragm 13 - 113mm (#2459300 , ā¬ 366,-)
- Suitable for sizes 75, 90 and 110mm of the Frame for D-ERF Filters 75-180mm (various versions available)
- For optimum adjustment of a telescope aperture when observing with an H-alpha filter of Solar Spectrum (also suitable for other brands)
- Made of CNC-machined aluminum
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# 2459247A
ā¬ 165.00 Price excl. German VAT tax (19%): ā¬ 138.66- Required to use Steplessly variable diaphragm 13 - 113mm (#2459300 , ā¬ 366,-)
- Suitable for sizes 135 and 160mm of the Frame for D-ERF Filters 75-180mm (various versions available)
- For optimum adjustment of a telescope aperture when observing with an H-alpha filter of Solar Spectrum (also suitable for other brands)
- Made of CNC-machined aluminum
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# 2459240
ā¬ 48.00 Price excl. German VAT tax (19%): ā¬ 40.34Solar Spectrum VerlƤngerungskabel 1,70m / 6.7" Learn More