View Full Version here: : Eta Carina in 7 Nm Hydrogen Alpha under a full moon
tornado33
03-02-2007, 12:57 AM
Hi
With the full moon up and a sky so bright I used the Baader 7 Nm Ha filter on Eta Carina nebula.
4x10 mins ISO400 Baader 7 Nm Ha filter, Idas uv/ir filter, MPCC coma corrector, 10 inch f5.6 newtonian, Modded 350D camera, hand off axis guided. Total 40 mins exposure time.
Sky was so bright I could not see Eta Carina naked eye at all, it was faster to use the Argo Navis to find it. The night was warm and there was a heap of dark current noise in the images, I took 3 darks afterwards and in Iris made a master dark, subtracting that in Iris from the light images got rid of most of the noise. A flat and offsets were also done as usual.
Larger version here
http://www.iceinspace.com.au/uploads/etacar%204x10minsiso400%20ha%20full moon10inch3feb07big.jpg
Processed in a hurry before i go to bed, no other noise reduction done as yet.
Scott
:eyepop: :eyepop:
OMGosh Scott that is superb !!!
Fantastic work mate.
tornado33
03-02-2007, 01:08 AM
Thanks.
When I saw the deep red nebulosity everywhere on the original images on the camera screen I was amazed how well the Ha filter works, it cuts through light pollution :)
Scott
Excellent image Scott!
(Fixed your link to the larger version)
You sat there for 40 minutes guiding by hand... Jeees, that alone is amazing.
One thing though, whats the point of the Idas IR/UV filter as the narrowband filter will do this already.
Rodstar
03-02-2007, 07:36 AM
Just beautiful, Scott. The detail in the nebulosity made me pause for some considerable time.
Garyh
03-02-2007, 08:20 AM
Nice Ha shot Scott, gives a totally different prospective to this region!!
Cheers Gary
acropolite
03-02-2007, 08:42 AM
Very impressive Scott, so much detail.:thumbsup:
tornado33
03-02-2007, 09:06 AM
Thanks all
Good question, Gama and its because the narrowband filter doesn let in infra red light lower down in the spectrum, they recommend a uv/ir filter for full cut off, only allowing in the Ha light. My DSLR is modified to allow in all light as I chose the clear glass option on the sensor when I ordered it from Hutech so I can do dinfra red imaging if needed.
Heres a colour version, showing similar to what it looks like on the camera screen
Scott
EzyStyles
03-02-2007, 11:10 AM
:eyepop: :eyepop: heaps of details there scott. very niceee. has the image been cropped or was that your fov?
tornado33
03-02-2007, 11:57 AM
Thanks
No thats the FOV, well was very slightly cropped as I move the telescope very slightly between each image to help smooth out non random noise. Probably about a dozen pixels shaved off one side.
Scott
avandonk
03-02-2007, 11:58 AM
Really good Scott. The image really shows off the quality of your mirror. The MPPC has done a good job and the guiding must have been good as well.
I think it is great being able to image when the Moon is up.
Bert
Hi scott, thats a ripper image full of depth and detail.
I really enjoyed looking at that.
Great imaging
tornado33
03-02-2007, 03:00 PM
Thanks all
I didnt think I was going to be doing anything as in the afternoon high cloud from the anvils of storms out west came over but dissipated once it got dark, look slike same is happening today. Might do some more Ha imaging tonight if i can
Sometimes the guiding doesnt wanna behave but last night it went well :)
Scott
rogerg
03-02-2007, 04:05 PM
Very nice detail, great image. Reminds me of looking down that jagged edge of constrast visible, in a 16" dob a while back with a nagler ... such nice detail and contrast.
iceman
03-02-2007, 04:18 PM
Wow, stunning Scott. The seeing appeared good last night, would've helped with your hand-guiding.
xstream
03-02-2007, 04:26 PM
You're the man, Scott. Absolutely stunning.
I had a look at the spetral response for this Baader filter, and it has IR cutoff up to 1180nm. Thats quite high. You wont get any IR higher from this as the sensor isnt sensitive to this spectrum area. So you wouldnt need it.
Unless my data on the Cmos sensor spectrum bandwidth is up the kaboo.
h0ughy
03-02-2007, 09:11 PM
;) very ordinary effort Scott. I have never seen such a pathetic example of the ETA complex in my life:scared: :whistle: .
(why does he get such gobsmackingly good images:shrug: , anyone would think he loves what he does;) :lol: )
Was it you that brought hubble main cameras down for you to replace them???????????????????????:)
Striker
03-02-2007, 09:52 PM
Another great image Scott.
You have been quiet lately...I know conditions have not been good for imaging anywhere in Aus lately.
Keep them coming Scott
tornado33
04-02-2007, 08:33 AM
Thanks :)
Yes ive not done a lot of imaging of late because the weather has been bad, not wet just lots of cloud (thats a sign of drought I guess lots of cloud but little rain).
Yes I may not even need the uv/ir filter too, but just leave it attached as I also use it when using the UHC-S filter.
Hehehe yes id love the Hubble cameras, mind you Id love control of the HST itself as well :)
Scott
skeltz
06-02-2007, 07:44 PM
Nice image scott and hand guided!!your a patient man well done.....ROB
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