You are not likely to see much of it in visible light wavelengths
Based on your post #3 above, some portion of a prominence can be visible.what is your point ?
How much does a rig like yours cost these days?You are not likely to see much of it in visible light wavelengths
Prominences can sometimes be seen during total eclipses
from one of my eclipse photos, 4 small proms just visible
View attachment 269868
The image you linked to is ionised helium, He II
Much/most of it is easily visible if you have a hydrogen alpha solar scope like my
LUNT LS60 THa. It has a very narrowband H-alpha filter in it < 1 Angstrom specifically
to observe prominences
View attachment 269867
from that scope.....
View attachment 269869
Sorry Dave, yes that is the finder scope attached to the Coronado (I wasn't 100% sure if the whole kit was called that). I got the whole assembly from OPT many years ago because I wanted to be able to sun-gaze safely ! I looked on the body of the scope but I didn't see a reference to the model, but mine looks very similar to the pictures you posted.one of these ?
if so, that's just a finder scope to align the sun for viewing through the main scope, like this ....
The Coronado SolarMax 70 Telescope
Maybe you mis stated what you have ?