Blue sun

[Demonperformer]

Like many others, I have been following the progress of AR1302. However, I have been rather puzzled by the fact that all my images have been blue:icon_scratch:. If I greatly increase the exposure I can get rid of the colour, but as that also tends to get rid of any sunspots as well that does seem to be a little self-defeating.

I am using the 102SLT stopped down with a 50mm solar film filter on the front and it definitely does not look blue when viewed visually.

The only thing I can think is that it is something to do with the fact that the canon has been modded and has a CLS clip filter 'jammed' in the slot (i.e. I can't remove it) and a UVIR block filter is screwed into the front of the nosepiece. Would that combination account for the weird colour (not that I particularly dislike it, it's just strange)? Or do you think something else is going on?

And yes, I know, my focussing leaves a little to be desired!

Thanks.

[Merlin66]

I'd have to say it must be associated with the bandwidth of the CLS filter.

A Uv-IR doesn't do this.

[jgs001]

Yeah, I'd agree, it looks a very cls tone. Nice image btw... why not convert it to monochrome and then apply some yellow colouration to it ?? That's what I do.

[Demonperformer]

Thanks guys, guess I will just have to live with it then.

Interesting suggestion, John, to convert to b/w & add some yellow coloring. Might well give that a try. Thanks.

[jgs001]

that's what I do to mine.. otherwise my white light images wouldn't have that toasty yellow-orangy-ness to them.

[markt]

Yup, just recolour in what ever post processing software you use...

[Smeg]

Are you sure that's not Neptune?

[Smeg]

Ca II K line

393 nm -> RGB -> 97/0/186

H Alpha line

656 nm -> RGB -> 255/0/0

Then you can always colour them orangy yellowy.

Just Desaturate... then add a new layer FILL with the colour of your choice then set the MODE to OVERLAY and then the Transparancy of that layer to suit.

[Macavity]

Do we know of a nice RGB combo for a (generally perceived) "yellow" solar disk?

There seems to be a lot data, for above-atmosphere, stellar classes etc., but...

[Smeg]

Can you do it in Pink too?

[Montana]

Great image! why not stick to black and white? sometimes colour can just distract us

Alexandra