Ha imaging filters

[Mr Thingy]

I was wondering if my Ha 7nm filter for imaging DSOs would have any notable effect in observing the sun (in combination with a Herschel wedge or solar filter of course).

I believe the solar Ha filters are about 0.5 A, which would be a 140x narrower band pass than my 7nm filter, if I calculated correctly. That probably answers my question but I'm wondering if anyone has tried and seen any effect.

There we go... silly question asked 😁

[Miguel1983]

Hi,

i think this came up recently in the SW webcast about solar, and as i recall the answer is no, but someone please correct me if i'm wrong.

The Baader solar continuum filter is supposed to be good in combination with a solar-film filter, so i've heard.

Edited December 6, 2020 by Miguel1983

[johninderby]

An HA DSO filter would just give you a red view of the son with no extra detail.  Discussed in this thread.

 

Edited December 6, 2020 by johninderby

[Mr Thingy]

Thanks. Then I will leave my Ha filter in the EFW and continue using my Continuum filter (or at least dream about it whilst hoping for the clouds to part).

[Hallingskies]

I put a 7nm Ha filter in front of the camera when solar imaging through Baader film, but only to reduce the amount of light getting to the camera.  It gives a bit more flexibility with exposure times. Other than allowing me to increase exposure time from the minimum 0.001s, I see no difference in detail or contrast.