Hello
I want to get a Lunt H-Alpha filter for solar imaging. Since I am not going to use my telescope for observing, I'm not sure if I need to buy the blocking filter as well. Is the blocking filter only a safety measure for solar observation?
Is the blocking filter necessary?
-
- The Sun?
- Posts: 4
- Joined: Thu May 12, 2016 3:11 pm
- Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: Is the blocking filter necessary?
<name?>,
The H alpha filter system is a combination of an ERF, an etalon and a blocking filter.
It needs all the elements to function. You definitely need both the front Lunt H alpha filter element plus the rear blocking filter for both visual and imaging.
The H alpha filter system is a combination of an ERF, an etalon and a blocking filter.
It needs all the elements to function. You definitely need both the front Lunt H alpha filter element plus the rear blocking filter for both visual and imaging.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- marktownley
- Librarian
- Posts: 42550
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20819 times
- Been thanked: 10489 times
- Contact:
Re: Is the blocking filter necessary?
Yes you do need a blocking filter.
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!