Quote:
Originally Posted by telecasterguru
Jase,
A wonderful image. Wide, wide, wide field never ceases to amaze and enthral me.
Frank
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Thanks Frank. Wide fields do have that spacial element too them. Composition is key for impact.
Quote:
Originally Posted by avandonk
Not bad at all Jase. That faint dust is most probably masked by the light pollution at my place. Next time you need a good rectilinear widefield give me a pm and if I can see it from my place I will whip one up. The Canon 300mm F2.8L lens has a field of 7x4.6 degrees with a full frame and has far less than 1% rectilinear distortion over its entire field.
Have you tried the the calibrate function in Registar? With enough overlap it matches brightness and colour balance etc.
I should really have said amazing image.
Bert
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May just take you up on that offer Bert. A scaffold image to register the panels against would have definitely assisted. I wouldn't need to see the nebulosity in the data, just the stars as that's all I'm registering against. Yes, I've tried Registar's calibrate feature, but found it suppressed the histogram details between the frames. It did provide relatively even illumination across the frames however. It has given me an idea though. I could use this feature for the initial background, then overlay the extend objects to counteract the dynamic range lost in the calibrate function. This maybe worth a try, but I don't know how well it would work for the presented image given the IFN is faint and not well defined is some regions. Thanks for checking out the image and for your input, it just maybe the answer for future mosaic work.
Quote:
Originally Posted by DavidU
WOW, killa detail. Fabulous guiding.
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Thanks David. No problems guiding at 530mm. I can go unguided for around 10mins at this focal length with PEC. I should perhaps spend a little more time tuning the mount to go longer.
Quote:
Originally Posted by avandonk
Jase the other thing you can do is generate a map and register with Registar to the map. I produced a map with a 10 degree FOV with Star Atlas Pro and used Registar to superimpose your image. It helps if you turn off the clutter of labels etc. Since your optic is rectilinear you can see that the map is as well. I left the galaxies turned on for all you galaxy hunters.
Large Map 4.7MB
http://d1355990.i49.quadrahosting.co...05/mapjase.jpg
Bert |
Excellent Bert. Thanks for the map overlay. The scene is not as featureless as originally thought. Some pleasing background galaxies around. The stand-out galaxy IC4633 is quite a treat, but did notice a few others while processing the image such as IC4618. Doesn't look very spectacular at 530mm. May consider targeting it at a long focal length of a rental scope. Thanks for putting this together. Appreciated.
Quote:
Originally Posted by RB
Beautiful shot Jase and a great writeup, as always I enjoyed both.
Fascinating to read about the IF illuminating the nebula !!
Thanks for sharing another breathtaking image with us.
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Cheers Andrew. Didn't plan on the long image blog, just thought others may get valuable information as to what went on. If it helps others, its constructive IMO. The IFN research conducted by Steve Mandel and others is certainly an interesting piece of work. As with most of the images on Steve's site, they exhibit a blue hue given strong UV flux. This wasn't present in any of the data I acquired. As indicated in the original post, but blue hues of the nebulosity were virtually non-existent. I ended up using pixel math obtain a better match for the green and red channels. Both of which were quite strong to begin with, hence the dusty characteristics (weighted green and red produced the brown hues). This makes me wonder if it is indeed a part of the Integrated Flux or an entirely different expanse of nebulosity. I've pinged Steve an email questioning this, will see where it leads. While the colour balance isn't as accurate as I would have liked, its is still close for a traditional RGB image. Anyway, thanks for checking it out and making comment.
Quote:
Originally Posted by JohnG
A beautiful shot, truly shows off what the FSQ can do.....
Cheers  |
Thanks John. The FSQ is the new age Schmidt astrograph. Well, maybe not...the Tak E180 covers a similar FOV and has the advantage of more aperture. Still the FSQ holds its own. Its always a blast to image with given its sampling with the STL11k If the seeing was worse than 3.5 arcsec/pixel, it don't think I'd be out in such bad weather.
Quote:
Originally Posted by Peter Ward
Jase! Maaaaaate!
Absolutely splendid |
Thanks Peter. Appreciated.
Quote:
Originally Posted by TrevorW
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Of course Trevor. I don't post half baked work or work in progress - not my style. Hit the full resolution image if you want to see the subtle hues. You'll need to throw away your monochrome monitor.
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Thanks again all.
Very clever..nice and subtle job, I like it 
