Antares Rho Ophiuchus DSLR reprocessed

[rcheshire]

This is the latest (http://synergous.com/photos/picture.php?/167/category/4)

I should know better than to post in the deep space section at this stage of the game. This is the latest rendition of Antares Rho Ophiuchus widefield. If anyone is interested using a flat with no bias correction eliminated most of the banding and gradients that come with the 1000D. It took a while to work out what was going on. In the end it came down to calibrating a single image with various combinations of master frames. Better viewed at lower resolution.

[RickS]

That's very nice! What lens did you use and how long were the exposures?

[apaulo]

Hi Rowland,
I dont agree, I think that image has a place in the deep sky arena.
Very nice image indeed. I think you have produced I beautiful wideview image.:thumbsup:
Regards Paul.

[jjjnettie]

It's a beautiful image. Well processed. The dust is lovely.

[Lester]

Very nice image Rowland.

[aworley]

very nice...!

[dugnsuz]

Don't sell yourself short Rowland - that image is very good indeed.
Perhaps try 'Selective Colour' in PS to ramp up the reds/blues/yellows if the image allows - personal taste though.
Repost this in Deep Sky at once!!!!
Doug

[rcheshire]

Thanks everyone. I keep finding ways to improve on things. I think, that's OK only to find more things and ways to improve. But the feedback is great.

38 frames 3.5 hours exposures between 15 - 5 minutes.

Camera - Canon 1000D iso800. Lens - Canon 200mm at f/3.2. Pollution filter - Astronomik CLS-CCD filter. Master bias dark and flat - the flats were taken at iso100 and later calibrated with a 100iso bias. I made the mistake of assuming that a bias is just a bias and calibrating the flats with iso800, which is same as lights and darks.

No calibration of flats at all produced an image with significantly less banding?

[midnight]

Very interesting Rowland re the flats.

Lovelly image of another of my favourite part of the night sky.

Well done and thanks for sharing.
Darrin...