A doubt about a Calcium Filter for solar observation
Posted: Sat Jul 25, 2015 11:36 pm
Hi:
A few days ago, I found this filter
http://agenaastro.com/baader-calcium-ca ... -1-25.html
Does somebody know it? Does it work well? Is it worth to buy it?
I ask it because before there were Calcium Telescopes for solar observations, but currently, I don't find them. However, there are modules, at least, sold by Lunt. The filter is cheaper than a module.
Regards
Angel
A few days ago, I found this filter
http://agenaastro.com/baader-calcium-ca ... -1-25.html
Does somebody know it? Does it work well? Is it worth to buy it?
I ask it because before there were Calcium Telescopes for solar observations, but currently, I don't find them. However, there are modules, at least, sold by Lunt. The filter is cheaper than a module.
Regards
Angel