Antlia 1.25" & 2" Solar Discover 3nm CaK Assembly
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
The Antlia Solar Discover 3nm CaK is an assembly consisting of one set of light reducing filters, designed to maximize imaging contrast of sun spots, solar surface granulation and other features that are prominent in CaK 393.3nm line.
An Antlia 3nm Ultra narrow bandpass filter wavelength centered on Calcium II K-Line 393.3nm is built in. Its high blocking specification of OD5 (0.001%) intends to reduce most solar heat ingress.
Compared to solar Herschel Wedge, the Antlia Solar Discover CaK 3nm assembly features a new tube structure design, 1.25’’ and 2’’ adapters are designed, as well as the addition of light-reducing filters. Installation is similar to the Antlia CaK 3nm Solar Herschel Wedge, with the telescope attached at one end and the camera at the another. The metal tube machined from aircraft aluminum CNN and oxidized. The filters are assembled in a fully closed tube. No stray light can escape from this.
Important Notes:
- When you are using a zenith mirror, the ERF filter must be installed in the correct position for safe operation. Please refer to the installation diagram.
- When you are using a telescope with an aperture >100mm, you need to use additional light reduction solutions, such as ERF filters，solar safety films, lowering the telescope aperture for safe operation while using Solar Discover 3nm CaK; If without the extra light reduction solution, the Solar Discover 3nm CaK can only used with REFRACTORS up to 100mm aperture.
About Visual Observation:
- The bandpass of CaK (393.3 nm) is almost invisible to the human eyes, hence, the Antlia Solar Discover 3nm CaK assembly is primarily used for solar imaging and not recommended for visual observation due to the difficulty of many to visually see information that CaK has to offer.
- In addition, the IR coating range of our products is slightly different from the ISO 12312-2 Standard for Solar Viewers, please see the following chart and refer to ISO 12312-2 Standard for Solar Viewers (https://eclipse.aas.org/eye-safety/iso12312-2).
- For tough technical requirements and safety considerations, we do not recommend Solar Discover 3nm CaK assembly for visual observation.If you need to use the product for visual observation, it is important to ensure that all filters built into the assembly are in good condition for safety.
Warranty:
- 3 years
- Disassembly of the assembly is prohibited and voids warranty. Any repair/returns/exchange for this item is not accepted once it has been disassembled.
| ISO12012-2 Transmittance Requirements |
Solar Antlia Transmittance Requirements (Solar Discover 5Ã… CaK, Solar 3nm CaK Assembly, Dualband Ha, CaK and CaH filter Assembly, ERF) |
||
| Requirements | Value | Wavelength Range | Wavelength Range |
| Tmax% | 0.0032% | 380-780nm | 380-780nm |
| Tmin% | 0.000061% | ||
| Tmax% (UVB) | 0.0032% | 280-315nm | 280-315nm |
| Tmax% (UVA) | 0.0032% | 315-380nm | 315-380nm |
| Tmax% (IR) | 3% | 780-2000nm | 780-1700nm |
Other Information
- Country of Manufacture: China
The Antlia Solar Discover 3nm CaK is an assembly consisting of one set of light reducing filters, designed to maximize imaging contrast of sun spots, solar surface granulation and other features that are prominent in CaK 393.3nm line.
An Antlia 3nm Ultra narrow bandpass filter wavelength centered on Calcium II K-Line 393.3nm is built in. Its high blocking specification of OD5 (0.001%) intends to reduce most solar heat ingress.
Compared to solar Herschel Wedge, the Antlia Solar Discover CaK 3nm assembly features a new tube structure design, 1.25’’ and 2’’ adapters are designed, as well as the addition of light-reducing filters. Installation is similar to the Antlia CaK 3nm Solar Herschel Wedge, with the telescope attached at one end and the camera at the another. The metal tube machined from aircraft aluminum CNN and oxidized. The filters are assembled in a fully closed tube. No stray light can escape from this.
Important Notes:
- When you are using a zenith mirror, the ERF filter must be installed in the correct position for safe operation. Please refer to the installation diagram.
- When you are using a telescope with an aperture >100mm, you need to use additional light reduction solutions, such as ERF filters，solar safety films, lowering the telescope aperture for safe operation while using Solar Discover 3nm CaK; If without the extra light reduction solution, the Solar Discover 3nm CaK can only used with REFRACTORS up to 100mm aperture.
About Visual Observation:
- The bandpass of CaK (393.3 nm) is almost invisible to the human eyes, hence, the Antlia Solar Discover 3nm CaK assembly is primarily used for solar imaging and not recommended for visual observation due to the difficulty of many to visually see information that CaK has to offer.
- In addition, the IR coating range of our products is slightly different from the ISO 12312-2 Standard for Solar Viewers, please see the following chart and refer to ISO 12312-2 Standard for Solar Viewers (https://eclipse.aas.org/eye-safety/iso12312-2).
- For tough technical requirements and safety considerations, we do not recommend Solar Discover 3nm CaK assembly for visual observation.If you need to use the product for visual observation, it is important to ensure that all filters built into the assembly are in good condition for safety.
Warranty:
- 3 years
- Disassembly of the assembly is prohibited and voids warranty. Any repair/returns/exchange for this item is not accepted once it has been disassembled.
| ISO12012-2 Transmittance Requirements |
Solar Antlia Transmittance Requirements (Solar Discover 5Ã… CaK, Solar 3nm CaK Assembly, Dualband Ha, CaK and CaH filter Assembly, ERF) |
||
| Requirements | Value | Wavelength Range | Wavelength Range |
| Tmax% | 0.0032% | 380-780nm | 380-780nm |
| Tmin% | 0.000061% | ||
| Tmax% (UVB) | 0.0032% | 280-315nm | 280-315nm |
| Tmax% (UVA) | 0.0032% | 315-380nm | 315-380nm |
| Tmax% (IR) | 3% | 780-2000nm | 780-1700nm |
The Antlia Solar Discover 3nm CaK is an assembly consisting of one set of light reducing filters, designed to maximize imaging contrast of sun spots, solar surface granulation and other features that are prominent in CaK 393.3nm line.
An Antlia 3nm Ultra narrow bandpass filter wavelength centered on Calcium II K-Line 393.3nm is built in. Its high blocking specification of OD5 (0.001%) intends to reduce most solar heat ingress.
Compared to solar Herschel Wedge, the Antlia Solar Discover CaK 3nm assembly features a new tube structure design, 1.25’’ and 2’’ adapters are designed, as well as the addition of light-reducing filters. Installation is similar to the Antlia CaK 3nm Solar Herschel Wedge, with the telescope attached at one end and the camera at the another. The metal tube machined from aircraft aluminum CNN and oxidized. The filters are assembled in a fully closed tube. No stray light can escape from this.
Important Notes:
- When you are using a zenith mirror, the ERF filter must be installed in the correct position for safe operation. Please refer to the installation diagram.
- When you are using a telescope with an aperture >100mm, you need to use additional light reduction solutions, such as ERF filters，solar safety films, lowering the telescope aperture for safe operation while using Solar Discover 3nm CaK; If without the extra light reduction solution, the Solar Discover 3nm CaK can only used with REFRACTORS up to 100mm aperture.
About Visual Observation:
- The bandpass of CaK (393.3 nm) is almost invisible to the human eyes, hence, the Antlia Solar Discover 3nm CaK assembly is primarily used for solar imaging and not recommended for visual observation due to the difficulty of many to visually see information that CaK has to offer.
- In addition, the IR coating range of our products is slightly different from the ISO 12312-2 Standard for Solar Viewers, please see the following chart and refer to ISO 12312-2 Standard for Solar Viewers (https://eclipse.aas.org/eye-safety/iso12312-2).
- For tough technical requirements and safety considerations, we do not recommend Solar Discover 3nm CaK assembly for visual observation.If you need to use the product for visual observation, it is important to ensure that all filters built into the assembly are in good condition for safety.
Warranty:
- 3 years
- Disassembly of the assembly is prohibited and voids warranty. Any repair/returns/exchange for this item is not accepted once it has been disassembled.
| ISO12012-2 Transmittance Requirements |
Solar Antlia Transmittance Requirements (Solar Discover 5Ã… CaK, Solar 3nm CaK Assembly, Dualband Ha, CaK and CaH filter Assembly, ERF) |
||
| Requirements | Value | Wavelength Range | Wavelength Range |
| Tmax% | 0.0032% | 380-780nm | 380-780nm |
| Tmin% | 0.000061% | ||
| Tmax% (UVB) | 0.0032% | 280-315nm | 280-315nm |
| Tmax% (UVA) | 0.0032% | 315-380nm | 315-380nm |
| Tmax% (IR) | 3% | 780-2000nm | 780-1700nm |
Other Information
- Country of Manufacture: China
Antlia 1.25" & 2" Solar Discover 3nm CaK Assembly