Quote:
|
Originally Posted by Hale_Bopp
Quote:
|
Originally Posted by um3k
Another question: If I make a filter with the BAADER material, can I then get a hydrogen-alpha filter to place in the eyepiece?
|
I have a PST  It is a great little instrument.
As to your question, I assume you are referring to the hydrogen-alpha filters you can buy from companies such as Lumicon that screw into an eyepiece. Sadly, the answer is no. These eyepiece filters have fairly wide bandpasses and are intended primarily for nebula viewing. You really need sub-angstrom bandpass to make a good solar h-alpha filter (in addition to filtering out almost all of the light!)
You can see the info and a filter response curve for a Lumicon night sky h-alpha filter here.
Lumicon h-alpha filter
Note that the filter transmits over 90% of the light up to 700nm and this continues well into the infared as well (only an issue for CCD cameras that will detect infrared light).
Rob |
Ok. I guess I'll have to wait to get a solar scope to see hydrogen alpha. I won't complain, though, seeing the sun in white light will be plenty for me!