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Dangerous-Dave

Rosette Nebula Ha/OIII

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This is a bit of an ongoing project with Astronomik narrow band filters and 300mm/f4 Pentax 6x7 lens. So far, I've got 2 hours of Ha and a bit less of OIII, I will add a bit more OIII and SII when skies permit.

5171737316_e4d11e6c06_b.jpg

Starlight Xpress SXV-H9 CCD camera, Pentax 6x7 300mm/f4 lens at f4, Astronomik 12nm Ha filter, Ha: 13x600s, OIII: 8x800s

Ha was mapped to red, OIII to green and blue, Ha as an additional luminance layer.

This one uses a synthetic green channel to produce silver/gold colour scheme:

5172060706_7b104406ab_b.jpg

Hope you approve.

DD

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Very nice so far Dave, sme high levels of detail building up in those image.

Steve

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The red one is best and the depth of field is a joy to see with dark dust standing right out.

John.

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What a beauty. If you are collecting SII either get a lot or don't bother, it would be a shame to degrade this image.

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Hi Dave,

Have you tried synthetic blue ? 80% O111 + 20% Ha.

Dave.

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Thanks for all the comments and feedback. I will give synthetic blue a try tonight, thanks for the suggestion Dave.

Kevin, yes the lens is a Pentax 6x7 medium format lens, the one on the far left here:

5182480384_a7a66c9c68_b.jpg

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Here's the synthetic blue tone map as mentioned by DaveW. Looks very natural but not sure if I like it as much as the Ha:O3:O3.

5184935883_d184198f41_b.jpg

Edited by Dangerous-Dave

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That's nice to my eye but it's your eye that matters.

I downloaded your photo and had a play swapping green and blue about and adjusting things but your effort wins.

You have some very nice data there. I look forward to the next iteration :)

Dave

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These are simply stunning... Love the second one.. ;0

Guy

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Very nice indeed, Dave. In the final edit I like the less green strs but the reds have lost out a bit. Any way of layering the best of both worlds?

Olly

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Hi Olly, the stars were actually more green (or rather cyan) in the synthetic blue image but I whitened them using the selective color tool in PS. I supposed it would be an easy job to do the same with the HA:OIII:OIII image.

D

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Very nice. I actually prefer the gold & silver colour scheme as it happens, if you're going to do false colour, might as well make it pretty :).

Tony..

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Amazing detail,i can almost feel myself falling into it.Its like a 3D image the deatil is that good.

Stewart.

Edited by saturn5

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Great work Dave, loads of faint stuff coming out

It has a real 3D quality to it

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