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M51, HaLRGB 22 Hrs.

ollypenrice

By ollypenrice
in Imaging - Deep Sky

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ollypenrice

ollypenrice

Posted
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Here's the Mk2 with Ha, folks. Flats are causing us grief at the moment so this had a lash-up of stacks with and without them to try to find a workable mean. ;)

Since the halo is so critical you need good flats, full stop. As usual with galaxies I kept the 6 hours' Ha contribution down to a hint here and there. Then it proved a pig to transfer to the web but this isn't too far off the 16 Bit in Adobe RGB. I'll be quite glad to see the moon back in the sky and my bed in the house!

Fullsize (nearly) is here; Galaxies - ollypenrice's Photos

Yves' setup (ODK14/Mesu200/SXH36. That mount is soooo easy to like.)

Olly

M51-HaLRGB-22-HrsWEB4-XL.jpg

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Tom OD

Tom OD

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Smashing, absolutely gorgeous Olly.

I've been having problems getting my Adobe RGB over to sRGB also. I use ie7, I've heard they deal with web colours poorly with regard other internet browsers like Firefox and Chrome.

My printer reckons that the Adobe RGB gamut has a much bigger range, and that the web can't handle it, so assigns it incorrect colours.

Tom.

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ollypenrice

ollypenrice

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I estimate that image cost only 2 pence per pixel :-)

Hey, not so fast, that's just Yves' kit! What about my hourly rate?? ;)

On minimum wage this image would bag me about £420. Hey, where's Yves??? Not to worry, I may get a tenner for it from a magazine, eh? Drink, anyone? My treat.

Olly

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ianaiken

ianaiken

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Olly - fantastic! Ha taken at 30 min subs?

How are you stacking in AA5 with lights from each night or are your flats the same for each night due to permanent setup? Funnily it's easy in PI to calibrate frames with different calibration frames, but in AA5 which is a easy and lightening fast I cannot figure it out.

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ollypenrice

ollypenrice

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Olly - fantastic! Ha taken at 30 min subs?

How are you stacking in AA5 with lights from each night or are your flats the same for each night due to permanent setup? Funnily it's easy in PI to calibrate frames with different calibration frames, but in AA5 which is a easy and lightening fast I cannot figure it out.

Yes, Ha in 30 minute subs. I stack the several nights' worth all together using the same flats which, as you say, is fine in a permanent observatory. I don't think you can dedicate certain flats to certain lights in AA5. You need to combine separate stacks.

Olly

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MartinB

MartinB

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Well done Olly, that is a stunning piece of work. A great sense of brightness and the colour depth is glorious. You've pulled out the faint outer stuff and still managed to keep the excellent contrast. Wonderful!

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ollypenrice

ollypenrice

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Thanks for all the positive feedback, everyone. We've just heard that this is going to get a page to itself in Astronomie, the French magazine, so we're feeling the 14 inch project is taking off!

I heard from Pieter Ven de Velde yesterday, as well. He's traveling in the USA and has just been to see Adam Block at the $500,000 dollar imaging scope he operates. Time for a bit of scribbling the cheque book, eh? All donations will be acknowledged!!!

Olly

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