The Eta Carinae Nebula (NGC 3372) in Carina (reprocess)

[Octane (Humayun)]

All,

Those of you who know me will recall that I lost all the astrophotographic data I had ever captured for the last 4-5 years in a hard drive failure. I had just my Rho Ophiuchus and Alnitak data saved locally. The rest died on my ex-housemate's notebook's hard drive.

I found a DVD lying around tonight which had some useable data on it. I must have made a backup at some point in the past but forgot about it.

I thought why not reprocess one of my favourite objects.

So, anyway, read and view here.

In the conversion to sRGB for web, some of the colours have tended towards a slight salmon, especially the keyhole, and as a result, the region now has a flat appearance. In the original *.PSD file, it's vibrant, has form and is full of colour; something's gone awry in the conversion process. Never to mind. I will recapture this gem when I can make it out next time, with the 40D (modified). Having said that, I'm quite pleased with all the subtle star colours.

Comments and critique are most welcome.

Regards,
Humayun

[iceman (Mike)]

I can see what you mean about the colours, especially in the saturated areas.

But it's a stunning image. I can't wait until you start producing new images!

[Tom Davis (Tom)]

Despite color bias issues this is a great image!

Tom

[Alchemy (Clive)]

it doesnt look so bad on my laptop ? though it did save with blue lines on it for some reason.

i did the autocolor button in photoshop and not much changed , maybee mine imported it differently to the others (big shrug of the shoulders)

sorry about all your data. 5 yrs gone. time to redo only better now you have the experience.

[Lester]

Very nice indeed Humayun.

[sjastro]

Very nice image.

Steven

[Hagar (Doug)]

Lovely image Humayun . The salmon colour doesn't look unnatural to me after all there is quite a large reflection/ OIII area around the core of this nebula.
Looks good to me.

[jase (Jason)]

Not bad work Humayun. You maybe able to convert it to Lab colour and tweak the a and/or b channels to reduce the impact. Shame about the loss of data...now get out there and collect more to make up for it.

[Octane (Humayun)]

Mike,

Cheers. It's just a matter of finding time away from work, and, the weather to stop conspiring against us all!

Originally Posted by iceman

I can see what you mean about the colours, especially in the saturated areas.

But it's a stunning image. I can't wait until you start producing new images!

Tom,

Thanks! I realise there's a fairly horrible bias, but, still, I think it's OK. Cheers for the compliment.

Originally Posted by Tom Davis

Despite color bias issues this is a great image!

Tom

Clive,

Not sure why it came with blue lines for you?

Yep, can't wait to get back out and re-shoot it all.

Originally Posted by Alchemy

it doesnt look so bad on my laptop ? though it did save with blue lines on it for some reason.

i did the autocolor button in photoshop and not much changed , maybee mine imported it differently to the others (big shrug of the shoulders)

sorry about all your data. 5 yrs gone. time to redo only better now you have the experience.

Lester,

Thanks, mate!

Originally Posted by Lester

Very nice indeed Humayun.

Steven,

Cheers.

Originally Posted by sjastro

Very nice image.

Steven

Doug,

I did compare my version with other people's who also have used a modified DSLR, but, they still manage to get a bit of purple/blue in there's. I'm not sure what's happened with mine. I don't have the original RAW data to stack again, just the final PSD file that IRIS saved for me. I'll just have to re-shoot it.

Thanks.

Originally Posted by Hagar

Lovely image Humayun . The salmon colour doesn't look unnatural to me after all there is quite a large reflection/ OIII area around the core of this nebula.
Looks good to me.

Jase,

Cheers. LAB was something that I did consider afterwards. I'll just leave it be for now, and, as you've said, get out there and re-do it all.

Originally Posted by jase

Not bad work Humayun. You maybe able to convert it to Lab colour and tweak the a and/or b channels to reduce the impact. Shame about the loss of data...now get out there and collect more to make up for it.

Thanks, all!

Regards,
Humayun

[multiweb (Marc)]

Pretty mad picture. Huge FOV. Not too keen on the star colors and overall red tinge but I have to admit the field sharpness and contrast is pretty neat. Can't wait to see more from you.