Solar images from the 19th Feb

[Maurice]

Hi

Attached are some Ha and CaH solar images from the 19th February.

SHG + 70mm f/6 refractor + INTI software.

Ha data collected at midday, CaH data collected at 5pm LT.

Regards
Maurice

[John W]

The orange SHG image is a real beauty Maurice. Which SHG are you using - commercial or made? Regards John W.

[Averton]

Great detail in these images Maurice. Loving your images!

[Merlin66]

Maurice,
Some excellent results there, well done!


John,
Unfortunately there are no current commercial spectroheliographs on the market.
There are 3D print plans available and a "set" of optics available from Shelyak in France.
My MiniSHG was made using unused 1 1/4" camera/ eyepiece adaptors, the 125mm lenses, a 2400 l/mm grating and a plywood box.

[Maurice]

Thanks John.

As Ken has said, no commercial SHG's atm.
Mine is the version designed by Christian Buil and is called a SolEx.
I 3d printed all the bits & purchased the optics kit from Shelyak in France.
Its a clever design that is really optimized for Ha use, but can work well all the way into the UV.
Christian has made use of the 125/80 ratio in the collimator to imager FL to basically fill the frame of a ASI178MM camera with a 4.5mm 10micron slit at 450mm of focal length for a full disc scan.
A good way to 'test the waters' and learn about using a spectroheliograph and its limitations.
I am currently designing my next one.....



Thank you Clare & Peter.




Thanks mate..