Antlia Dualband Energy Rejection Filter for Solar Discover - 130mm
Ships by Next Business Day
Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.
US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.
International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.
The Antlia Dualband Solar Energy Rejection (ERF) Filter is designed by combining Hydrogen Alpha, Calcium K-Line and Calcium H-Line in one dualband filter. It is used in conjunction with the Antlia Solar Discover 3nm CaK, Solar, 5Ã… CaK or similar products to protect your solar imaging equipment from high temperatures and bandpass shifting by rejecting excessive heat build up.
This ERF is very effective at blocking far UV and IR light, while allowing the desired wavelengths Ha 656.3nm, CaK 393.3nm and CaH 396.8nm to pass through.
Product Features:
- FWHM 25nm with CWL at H-alpha wavelength of 656.3nm; Transmission: T＞95%
- FHWM 25nm with CWL at CaK wavelength 393.3nm covering Calcium K-Line 393.3nm and Calcium K-Line 396.8nm; Transmission: T＞90%
- Coating Range: 200-1700nm wavelengths
- Finished with the most advanced multicoatings
- Coated on heat resistant double-polished substrate
- Antlia ERF 130mm filter is mounted in a housing/cell to hold it in front of the telescope
- Transmitted Wavefront: Lambda/4 or better.
Specifications:
- FWHM: 25nm
- CWL (Central Wavelength):
- H-alpha: 656.3nm
- CaK & CaH: CaK 393nm covering CaK 393.3nm & CaH 396.8nm
- Peak Transmission: 90%
- Coating Range: 200-1700nm
- Filter Thickness: 10mm+/-0.05mm
- Clear Aperture: 130mm
- Can be used with dewshield/tube outside diameters between 130mm and 190mm
Important Notes:
- The Antlia Dualband ERF filter cannot be used on its own. It must be used together with professionally made solar imaging equipment which have their own complete blocking filters assembled, such as Antlia Solar Discover 5AÌŠ CaK, Solar Discover 3nm CaK Assembly, Dualband Ha, CaK and CaH filter Assembly
- Please do not use the Antlia Dualband ERF filter by itself for visual observation
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
The Antlia Dualband Solar Energy Rejection (ERF) Filter is designed by combining Hydrogen Alpha, Calcium K-Line and Calcium H-Line in one dualband filter. It is used in conjunction with the Antlia Solar Discover 3nm CaK, Solar, 5Ã… CaK or similar products to protect your solar imaging equipment from high temperatures and bandpass shifting by rejecting excessive heat build up.
This ERF is very effective at blocking far UV and IR light, while allowing the desired wavelengths Ha 656.3nm, CaK 393.3nm and CaH 396.8nm to pass through.
Product Features:
- FWHM 25nm with CWL at H-alpha wavelength of 656.3nm; Transmission: T＞95%
- FHWM 25nm with CWL at CaK wavelength 393.3nm covering Calcium K-Line 393.3nm and Calcium K-Line 396.8nm; Transmission: T＞90%
- Coating Range: 200-1700nm wavelengths
- Finished with the most advanced multicoatings
- Coated on heat resistant double-polished substrate
- Antlia ERF 130mm filter is mounted in a housing/cell to hold it in front of the telescope
- Transmitted Wavefront: Lambda/4 or better.
Specifications:
- FWHM: 25nm
- CWL (Central Wavelength):
- H-alpha: 656.3nm
- CaK & CaH: CaK 393nm covering CaK 393.3nm & CaH 396.8nm
- Peak Transmission: 90%
- Coating Range: 200-1700nm
- Filter Thickness: 10mm+/-0.05mm
- Clear Aperture: 130mm
- Can be used with dewshield/tube outside diameters between 130mm and 190mm
Important Notes:
- The Antlia Dualband ERF filter cannot be used on its own. It must be used together with professionally made solar imaging equipment which have their own complete blocking filters assembled, such as Antlia Solar Discover 5AÌŠ CaK, Solar Discover 3nm CaK Assembly, Dualband Ha, CaK and CaH filter Assembly
- Please do not use the Antlia Dualband ERF filter by itself for visual observation
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
Antlia Dualband Energy Rejection Filter for Solar Discover - 130mm