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Pleiades and Rossette

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#1 bunyon

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Posted 02 February 2013 - 08:52 AM

It wasn't a bad night but clouds rolled in and cut me off on the Rosette, but I'm happy with how these turned out.

Cheers.

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#2 jambroseus

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Posted 02 February 2013 - 10:16 AM

Good Rose, sharp focus and great depth. M45 seems a bit off in color. Did you neutralize the background in these?

Give us some details...

John

#3 bunyon

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Posted 02 February 2013 - 12:42 PM

On this computer it looks a little red. That's what I get for late night processing.

Details are on the astrobin site. No color correction was made except by eye as I processed. I really should shoot a gray card with the modded cam.

#4 terry59

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Posted 02 February 2013 - 07:50 PM

On this computer it looks a little red. That's what I get for late night processing.

Details are on the astrobin site. No color correction was made except by eye as I processed. I really should shoot a gray card with the modded cam.


Start by aligning the R, G and B channels :)

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#5 bunyon

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Posted 02 February 2013 - 09:06 PM

Terry, what software do you use to do that? I'm playing with channels in photoshop but I can't tell they're off - for what it's worth, the shorttube I image with focuses R and B at very different places.

Here is a revision which is much more blue and I've done a star reduction.

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#6 carlstronomy

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Posted 02 February 2013 - 09:19 PM

Paul nice images, Rossette looks mighty fine and the re process on the colours for Pleides looks much better,

Carl

#7 NeilMac

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Posted 02 February 2013 - 11:35 PM

What EP/magnification is being used for these pics?

#8 terry59

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Posted 03 February 2013 - 07:44 AM

I ran a Dynamic Bakground Extraction on it using PixInsight

#9 bunyon

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Posted 03 February 2013 - 08:44 AM

I need to get PixInsight. Seems the answer to every other question I ask lately. Thanks.


NeilMac: both images are prime focus (f/5) with an Orion short tube. No eyepieces or other mag. The st80 is 400mm focal length, 80mm aperture.

#10 SKYGZR

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Posted 04 February 2013 - 01:04 AM

A minus violet filter may help when using the ST80. (not the best little refractor for AP), better for guiding. An AT 72 will be better color corrected.

#11 darbyvet

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Posted 04 February 2013 - 10:18 AM

On this computer it looks a little red. That's what I get for late night processing.

Details are on the astrobin site. No color correction was made except by eye as I processed. I really should shoot a gray card with the modded cam.


I had a terrible time trying to get the red out of my m45 until I used a grey card shot to balance my modded camera. After applying the custom white balance I could finally get some blue.You can correct the color balance in your image after the fact by using a grey card photo and PS.

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