Filters & Acc.
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Filters & Acc.
50mm H-alpha double-stack solar filter, for all LS50FHa filter-systems and LS60THa/LS60MT telescopes
With this filter LS60 telescopes and LS50FHa filter systems show even more details on the solar surface
1949.00 € 1754.00 €
Estimated delivery time : 3-4 days
60mm H-alpha double-stack solar filter, for all LS60FHa filter-systems and LS60THa/LS60MT telescopes
With this filter LS60 telescopes and LS60FHa filter systems show even more details on the solar surface
3398.00 € 3058.00 €
Estimated delivery time : Will be ordered for you
This filter slider holds a mounted 1.25" filter and fits into the Altair version 2 magnetic filter holders.
52.00 € 46.80 €
Estimated delivery time : 1-4 days
The new TriBand V2 Filter
- Anti-Halo coating on both surfaces to reduce reflection artefacts from reducers and camera lenses.
- Increased blocking of UV, IR and unwanted visual range wavelengths. UV OD7 (T0.00001%) Visual OD5 (T0.001%) and IR OD4 (T0.01%) for the ultimate in skyglow blocking. This is an order of magnitude better than foreign filters.
- Higher transmission % of desired wavelengths Ttop 93% (Average 5% higher transmission of target wavelengths than V1). In general a 5% gain on foreign filters.
- Ha at 14nm and Oiii at 34nm FWHM for with less tail-off to reduce unwanted light pollution, whilst keeping transmission high compared to the V1.
159.00 € 143.00 €
Estimated delivery time : 1 week
The Altair Dichroic Solar Energy Rejection Filter or D-ERF protects your telescope and solar imaging equipment from excessive heat build-up when solar imaging or observing with your Daystar Hydrogen Alpha Quark, or other Hydrogen Alpha Etalon filters.
756.00 € 680.00 €
Estimated delivery time : 1-2 weeks
The Altair Dichroic Solar Energy Rejection Filter or D-ERF protects your telescope and solar imaging equipment from excessive heat build-up when solar imaging or observing with your Daystar Hydrogen Alpha Quark, or other Hydrogen Alpha Etalon filters. Now you can save money by combining Hydrogen Alpha, Calcium K-Line and Calcium H-Line in one TRIBAND pre-filter.
Product Features:
- Reduces approx. 98% of heat reaching the optics to keep Etalon from drifting off-band and protect your equipment.
- 30nm FHWM Bandpass at H-alpha (H) wavelength of 656.28 nm (Full Width Half Minimum) Transmission: ~95.5%
- 40nm FHWM Bandpass with CWL at 395nm covering Calcium H-Line and Calcium K-Line wavelengths. Transmission: ~90.5%
- UVIR blocking OD3 0.1% @400-1100nm blocking over 98% of heat to your 3rd party Etalon at eyepiece or camera end, E.g. Daystar Quark). Please note it's your responsibility to use a proper commercial Etalon with this product, and to follow the manufacturer's instructions.
- Visible light blocking: OD4 0.01% @400-700nm to reduce reflection effects and over 98% of heat.
- Diameter 120mm Thickness 12.0mm (required to achieve surface precision)
- Multilayer coatings with SiO2 protective overcoat.
- ERF Holder cell included with soft tip threaded knobs. Tough and very light, easy to disassemble for cleaning the filter with optical wipes. Cell does not put any tension on the optics.
832.00 € 749.00 €
Estimated delivery time : 1 week
The Altair Dichroic Solar Energy Rejection Filter or D-ERF protects your telescope and solar imaging equipment from excessive heat build-up when solar imaging ...
1588.00 € 1429.00 €
Estimated delivery time : 1-2 weeks
This filter slider holds a mounted 2" filter and fits into the Altair version 2 magnetic filter holders.
59.00 € 53.10 €
Estimated delivery time : 1-4 days
Filter change in a few seconds without removing the camera, ideal for astrophotography - the filter holder is the compact and lightweight alternative to the filter wheel.
149.00 € 134.00 €
Estimated delivery time : 1-4 days
High quality filter for CMOS photography with the following features:
- 1st band, CWL495nm FWHM35nm
- 2nd band, CWL 660nm FWHM 35nm
- 1mm thick optical glass with 30 arc sec parallelism.
- UVIR Block and Anti-Reflection Coating.
159.00 € 143.00 €
Estimated delivery time : 2-4 weeks
The new TriBand V2 Filter
- Anti-Halo coating on both surfaces to reduce reflection artefacts from reducers and camera lenses.
- Increased blocking of UV, IR and unwanted visual range wavelengths. UV OD7 (T0.00001%) Visual OD5 (T0.001%) and IR OD4 (T0.01%) for the ultimate in skyglow blocking. This is an order of magnitude better than foreign filters.
- Higher transmission % of desired wavelengths Ttop 93% (Average 5% higher transmission of target wavelengths than V1). In general a 5% gain on foreign filters.
- Ha at 14nm and Oiii at 34nm FWHM for with less tail-off to reduce unwanted light pollution, whilst keeping transmission high compared to the V1.
159.00 € 143.00 €
Estimated delivery time : 1 week
Another first for solar astronomy, the Altair G-Band 2nm Solar filter enhances finer details in the solar photosphere.
Altair 2nm G-Band Solar Contrast Filter filter specifications:
- Standard 1.25" Filter Threaded Aluminium Cell
- CWL 430.3nm @ 96% transmission, tolerance 1%
- FWHM 2nm, tolerance 0.5nm.
- 1.85mm thick quartz ?/4, Parallelism (arcsec) 30"
- Si02 "hard" overcoat with UVIR Block 300-1100nm and Anti-Reflection Coating
- High resolution spectrographic test report included corresponding to each individual filter.
279.00 € 251.00 €
Estimated delivery time : 2-4 weeks
