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Post by ChrisV on Mar 2, 2016 11:06:20 GMT
Got my new scope, a WO GT81, setup with a SkyQ. . Then some images with the Rev Imager, a x0.5 reducer (probably not the best for this scope) and an Otplong UHC filter. All are 20sec single shots from the camera, Gain & sensup OFF, but fiddled with contrast after. Eta Carina, Lambda Centauri, NGC5128, Southern Pinwheel (have to work to get it as nice as Ken's). Anyone know what all the vertical lines are on the Sth Pinwheel. Some weird noise thing ? It was there on all my shots. Chris
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Post by Dragon Man on Mar 2, 2016 12:43:04 GMT
Woo-Hooooo, fantastic results Chris! Yeah, the banding looks like interference from your data cable being too close to, or touching, a power cable. Wow that's a really WIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIDE field of view!
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Post by Rick in NWArk on Mar 2, 2016 14:34:01 GMT
Great results, Chris! Fantastic colors!
Visual guys would need a scope 16" or more and a $250 eyepiece to just get a hint of color!
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Post by ChrisV on Mar 3, 2016 0:19:01 GMT
Thanks. The images have a nice wide FOV - I stopped whinging about my SCT and replaced it with the WO refractor (~240mm effective FL with the reducer). And the colour was phenomenal (if not a bit exaggerated with the contrast fiddle I did after). The images looked better on my monitor than the frame grabs on the computer. Must be the crappy resolution of the frame grabber, or something I'm doing in Sharpcap. Or maybe the bodgy 12 year old laptop I'm using.
That makes sense about the 50Hz. Everything is battery powered outdoors. Must be the crappy long video line to indoors. Next I'm going to try the LiveStacking in Sharpcap (this might also help with the mains interference ?)
Yes, what size scope would you need to see this through an eyepiece ?
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Post by howie1 on Mar 3, 2016 0:57:04 GMT
Lovely scope and lovely images, Chris ... really good for first light. You must be pleased as punch mate! Huge scopes you still wouldnt see the colors you see there and in a LP backyard huge scopes just seem to magnify the LP IMHO! So you kinda have the best of all worlds .... small, light and not a hassle to setup, fine optics with the GT, no collimation probs with a frac (generally), good FOV and color views even in full moon/LP backyard! If you need bigger mag the frac will take heaps BTW.
And yeah get the 2.7 SharpCap with its built in stacking thing and go for it mate! Can't wait to see more photos. cheers.
Howie
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Post by Rick in NWArk on Mar 3, 2016 3:12:18 GMT
My understanding is that only some people can see color thru a 16" to 18" dob.
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Post by Dragon Man on Mar 3, 2016 10:30:15 GMT
Not so Rick. It depends on the location. Here at our dark sky we can see colour in M42 with as small as an 8" Dob and a $29 30mm EP. A 12" Dob makes it really obvious. Anything smaller than 8" and it is just gray, but the 8" f5 shows a slight pastel pink tinge to the wings and slight pastel green in the core area. The 12" f5 gives a brighter pastel pink in the wings and a lovely green in the core area. This is how it looks in an 8" Dob:
In a 12" it's even more colourful
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Post by Rick in NWArk on Mar 3, 2016 15:46:04 GMT
Nice, Ken... I have never seen DSO color through an eyepiece but haven't often been in super dark skies before either. I think I've only gotten to look through two 16" scopes, too. At our club site which is pretty dark, one guy sometimes brings a 14" dob, but I've not seen color thru it yet. Now maybe with Orion and other objects with high surface brightness its a different story that what I've seen thru his scope?
Anyway, thanks for the correction!
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Post by Dragon Man on Mar 3, 2016 15:59:18 GMT
Rick, M42 is the only nebula that shows colour visually. Planetary nebula and stars are easily seen in colour, as are the Planets. But as far as Galaxies and Nebulae, M42 is the only one.
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Post by johnno on Mar 4, 2016 0:36:53 GMT
Plenty of colour in the first two and FOV seems spot on for them, 3 and 4 bit on the wide side.
I agree with Ken about the inference
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