HA with DSLR?

[astroimpulse]

The forum won't search 'HA' because it's too small so i thought I'd ask

Is it acceptable to use a DSLR to take HA lights? ie. Take the colour lights and then do some HA with the chosen filter?

I've seen images with HA added (CCD) and they add so much it's unbelievable.

Will a DSLR treat the HA captures correctly? I can't see why not but then again...I could be completely wrong and it would be an expensive mistake to buy the filters

Many thanks

EDIT: Camera will be fully modded

[Photosbykev]

from what I've read you will need a modded dSLR to increase the sensistive for capturing Ha and then use a Ha filter , maybe a clip in?, to restrict the bandwidth being captured to just the Ha range.

[astroimpulse]

Ah, yes...forgot to add it will be fully modded...good spot

I realise it will need a filter (see post), hence why I'm asking the question in case I waste money

They're expensive but from images I've seen they well justify their price.

If it's totally acceptable method (using a DSLR) then I'm as happy as a bunny (are they actually happy? Do we know? )

[Photosbykev]

Ah, yes...forgot to add it will be fully modded...good spot

I saw the "to be modded" in your signature

[astroimpulse]

*thumbs up*

Love your work by the way

[Starblazer]

All this talk of modding camera's got me itching to do mine >..<

[JCJC]

Yup... Santa bought me a 2" 7nm Ha filter this year, so hoping to try that with my 450D soon.

As Ha is basically red, you just extract the red channel from the data (there will be nothing in the G or B I don't think) and use that as the monochrome Ha.

The bayer matrix required for OSC means signal:noise will be worse than with a mono CCD but it works nonetheless.

Jordan

[Psychobilly]

Absolutely... I only have the 2" 35 nm Baader Ha filter... and a Modified 1000D...

Here's a pic from a few years ago... 12x900s @ ISO800 Megrez 72 FFIII

[astroimpulse]

Where's the 'drool' smilie when you need it?

Billy, that's outstanding.

[ollypenrice]

He's good, is old Psychobilly! Peter, what is the debayer routine you used? Do you then have to resize the image? I have never done it.

Olly

[Psychobilly]

Or...

Grab some Ha....

And Combine it with some Color...

Thanks both...

Olly its so long ago That I cant remember...

IIRC I opened the image as RGB and create a greyscale from just the Red channel...

Peter...