Quantum Calcium II H-Line PE
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Quantum Calcium II H-Line PE
DayStar is proud to offer Calcium H ( 3969Å ) filtering systems. These studies have been instrumental in determining depth of the solar atmosphere. Calcium offers TWO strong absorption lines at 393.3nm and at 396.9nm, known as the K and H lines. Researchers have previously avoided the H line for academic research, as it is very close to the Hydrogen Epsilon line. For purposes of clarity in isolating Calcium, and because imaging sensors offer similar sensitivity to the K as the H lines of Calcium, the K has to date been the target of choice in Calcium filters.
However, as the visual spectrum ends at approximately 400nm, the further we venture below this wavelength, the more difficult it is for observers to visually see the image. The H line for visual observations, is much closer to the visual spectrum and easier to see in high contrast violet color. Some observatories have been imaging in Ca II H line, such as the Dutch Open Telescope with outstanding results.
* Note. Calcium H filters do not require F/30 configurations. They may be used at F/15 or F/20 or greater. They also do not use the same RED or Yellow glass Energy Rejection Prefilter. Rather, we recommend dielectric "hot mirror" UV/IR cut filters introduced prior to focus. Additionally, we suggest an additional neutral density solar film on apertures above 150mm or for long-term dedicated applications.
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Please allow 10 days for your order to arrive. We source products from all over the world to bring you epic offers and the lowest prices. This means sometimes you have to wait a little longer to get your order but it's always worth it! |
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Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap! |
![]() |
Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap! |
|
![]() |
In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down. |
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![]() |
We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again. |
|
![]() |
Ordering from Scopes Zone is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either. |
Quantum Calcium II H-Line PE
DayStar is proud to offer Calcium H ( 3969Å ) filtering systems. These studies have been instrumental in determining depth of the solar atmosphere. Calcium offers TWO strong absorption lines at 393.3nm and at 396.9nm, known as the K and H lines. Researchers have previously avoided the H line for academic research, as it is very close to the Hydrogen Epsilon line. For purposes of clarity in isolating Calcium, and because imaging sensors offer similar sensitivity to the K as the H lines of Calcium, the K has to date been the target of choice in Calcium filters.
However, as the visual spectrum ends at approximately 400nm, the further we venture below this wavelength, the more difficult it is for observers to visually see the image. The H line for visual observations, is much closer to the visual spectrum and easier to see in high contrast violet color. Some observatories have been imaging in Ca II H line, such as the Dutch Open Telescope with outstanding results.
* Note. Calcium H filters do not require F/30 configurations. They may be used at F/15 or F/20 or greater. They also do not use the same RED or Yellow glass Energy Rejection Prefilter. Rather, we recommend dielectric "hot mirror" UV/IR cut filters introduced prior to focus. Additionally, we suggest an additional neutral density solar film on apertures above 150mm or for long-term dedicated applications.
![]() |
Please allow 10 days for your order to arrive. We source products from all over the world to bring you epic offers and the lowest prices. This means sometimes you have to wait a little longer to get your order but it's always worth it! |
|
![]() |
Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap! |
![]() |
Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap! |
|
![]() |
In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down. |
|
![]() |
We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again. |
|
![]() |
Ordering from Scopes Zone is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either. |