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Another beautiful shot Tony ! this one I like looking at through scopes of 18" and bigger you really start getting a good look at It's structure much like you see in photo's whith out the colour .
You even captured a tiny edge on galaxy on the upper right edge of the nebula. Right near that bright star. Although it isn't too obvious but it is
there. Well done!
You even captured a tiny edge on galaxy on the upper right edge of the nebula. Right near that bright star. Although it isn't too obvious but it is
there. Well done!
regards,CS
Thanks CS. Yes I can see it now. How about that. Thanks for pointing it out.
Oh yes I remember this one of yours Narayan ! very nice indeed . I've tried this with very
bad results I found It very difficult to do well from my location. What was your exposure time on this one Narayan do you recall ?
the details were:
40 minutes of total exposure with the ED80-four 10 minute frames at ISO 400-(from my backyard -ie light pollution central)-stacked in IRIS
Astronomik CLS filter
Ah thats descent exposure time Narayan , I would love to see you add another 40 minutes to this shot. Seems to me that with the ligh polution we are battling you are better of with the 10minute sub and multiple exposures even with a filter !
Have you ever tried the Helix from a dark site ?
No It would be good to try from Kulnura...and add another 40 minutes of data to go deep like Tony has
fact is from my back yard I can't see the Helix visually.. I have tried many many times with 7 x50s, 11 x70s and 20 x 80s..Picked it easily with my ETX 70 from Kulnura though last time we were up there
I am starting to go back through my raw images and apply better calibration techniques. This one is 36 x 1.5 minutes - unguided - and 6 x 5 minutes hand guided (never again!) so the stars and detail are a little bloated and elongtated, but you can start to see the outer ring of the nebula. Its with the modified 300D + Tak 530mm FL f3.3 astrograph. The first set of images was from June 23, 2004 and the second Aug 7, 2004 (if you look you will see a 12th magnitude asteroid slightly trailed near the lower left of the image)
I've attached a very small version, but for broadband users the full size image (500KB) is at:
Nice Helix Terry the nebs come out very well inded , even some of the fainter part of It.
Hand guided ah ? bugger that Terry, sounds like a lot of frustrating work to me
I am starting to go back through my raw images and apply better calibration techniques. This one is 36 x 1.5 minutes - unguided - and 6 x 5 minutes hand guided (never again!) so the stars and detail are a little bloated and elongtated, but you can start to see the outer ring of the nebula.
Hi Terry
Very nice Helix. And yes the outer ring is quite visible although a little noisy. I didn't even know it was there until after I finished my processing. I might go back and see if I can't tweak it a little.
And Hey, nothing wrong with manual guiding. It's the only type I've got. I'm just thankful that I didn't start with film. One of my mates used to guide at the eyepiece for up to 50 min at a time, on his back!!!
I am suprised you could get any trace of that outer ring with 67x30 second exposures + unmodified camera even with 10" aperture! Thats quite an achievement.
I reckon this object - from my location and scope - would need about 3 hours + LP/Nebula filter to get that outer portion acceptably smooth and I am not a big fan of noise reduction (although I used just a touch in that image).
Sorry, I may have mis-led you. I didn't know the out ring existed until I saw it in someone elses image. I didn't even try for it in my processing. It may well not be there. I'll get back to you.
I might go back and see if I can't tweak it a little.
