MartinB Posted October 22, 2008 Share Posted October 22, 2008 Lovely sky tonight, great seeing, no dew but blowing old boots. Not a great time to be imaging at 2500mm F10 esp narrow band but I just wanted to sort out a few gremlins with my active optics unit. Well the wind got to the image and it was a bit of a struggle but the gremlins are all sorted now (guide cable was dodgy)This is 10x10 mins each for HA and OIII with a synthetic green channel. It's a diddy little thing.(click to enlarge) Link to comment Share on other sites More sharing options...
LostNSpace Posted October 22, 2008 Share Posted October 22, 2008 Hi MartinI think that has turned out quite well......Its not the easiest object to capture and all my previous attempts at this target were just about fit enough for the recycle bin......Mark Link to comment Share on other sites More sharing options...
MrEd Posted October 22, 2008 Share Posted October 22, 2008 HI MartinLovely image with so much detail andi have never seen this imaged in narrowband.Well done old chap.Ed Link to comment Share on other sites More sharing options...
CELESCOPE Posted October 22, 2008 Share Posted October 22, 2008 I reckon thats a great image ,fantastic detail the the dumbell, and the outer regions show up nicely , i would be well pleased if i took that one . Super shot Link to comment Share on other sites More sharing options...
dogfish Posted October 22, 2008 Share Posted October 22, 2008 Cracking shot Martin, given the problems. There's been a bumper crop of good PN images so far this season and this counts as one of the best.Cheers, Martin Link to comment Share on other sites More sharing options...
MartinB Posted October 22, 2008 Author Share Posted October 22, 2008 Thanks a lot guys. The wind just seems to have the effect of slightly smearing everything. I processed it on my laptop when I got in but have now had a go at it using a decent monitor,(click to enlarge) Link to comment Share on other sites More sharing options...
centroid Posted October 22, 2008 Share Posted October 22, 2008 It was worth the late night then That's a nice result, of a 'not so easy' object.Did that 'little fellow' last year, so I know he can be 'tricky' one.Dave Link to comment Share on other sites More sharing options...
anthony Posted October 22, 2008 Share Posted October 22, 2008 Greater detail showing in the second. Superb shot given the technical demands never mind the wind.NiceAnthony Link to comment Share on other sites More sharing options...
Kaptain Klevtsov Posted October 22, 2008 Share Posted October 22, 2008 Superb Martin, you caught the little blighter very well.Kaptain Klevtsov Link to comment Share on other sites More sharing options...
Paxo Posted October 22, 2008 Share Posted October 22, 2008 Excellent image Martin, it's a very faint object. I remember a few months ago being extrememly frustrated with a guiding problem, turned out to be a dodgy cable, there's nothing more frustrating. This looks fantastic in narrowband, never seen this object done this way before.Steve Link to comment Share on other sites More sharing options...
Beyond_Vision Posted October 22, 2008 Share Posted October 22, 2008 Great capture Martin and glad to hear you have sorted out your active optics problems Fantastic amount of detail on the little blighter RegardsKevin Link to comment Share on other sites More sharing options...
trevboyd Posted October 22, 2008 Share Posted October 22, 2008 Great image, Martin - indeed very small as others have said! Trev Link to comment Share on other sites More sharing options...
johnh Posted October 22, 2008 Share Posted October 22, 2008 Great image, m76 is not that small but the faint handles are tricky, you won against wind fantastic result. Link to comment Share on other sites More sharing options...
trudie Posted October 22, 2008 Share Posted October 22, 2008 Despite the adverse conditions, its still a great image Martin.Trudie Link to comment Share on other sites More sharing options...
darditti Posted October 22, 2008 Share Posted October 22, 2008 Very impressive result. Looks almost as tight as it could be at that FL despite the wind. I don't know what were the problems you had with the AO, I don't have experience of one, but how much difference do you think the AO unit makes?David Link to comment Share on other sites More sharing options...
Doc Posted October 22, 2008 Share Posted October 22, 2008 Impressive colours.I like this one alot. Link to comment Share on other sites More sharing options...
MartinB Posted October 22, 2008 Author Share Posted October 22, 2008 Thanks everyone. Very impressive result. Looks almost as tight as it could be at that FL despite the wind. I don't know what were the problems you had with the AO, I don't have experience of one, but how much difference do you think the AO unit makes?David I think the AO makes a signifcant difference. Because of the wind I limited the guide exposures to 0.2 secs to keep a good s/n ratio and that was giving 4 guide cycles per second. That was just quick enough to keep the guide star in the window during gusts although I did loose a few subs. I doubt it would have been possible to get many subs guiding conventionally. For the final 20 mins of the session the wind had dropped so I was able to drop the guide exposure to 0.08 secs giving a 10hz cycle. At this speed the stars are really tight with sub 2 arc sec FWHM stars. If you can overcome all the difficulties then AO will improve resolution (provided you can find a bright enough guide star). That's why I've stuck at it. The problem I was having at Kelling was that the mount wouldn't respond to signals from the AO. Same problem last night so I changed the cable and everything was fine. The AO window only has limited travel so after a while it needs to be recentred by making corrections through the mount. Link to comment Share on other sites More sharing options...
Psychobilly Posted October 22, 2008 Share Posted October 22, 2008 Very nice image of a small target ..Billy... Link to comment Share on other sites More sharing options...
MikeD Posted October 22, 2008 Share Posted October 22, 2008 Awesome result Martin, great colour and nice and tight despite the wind.mike. Link to comment Share on other sites More sharing options...
thing Posted October 22, 2008 Share Posted October 22, 2008 Lovely job Martin, I've had a go at that one myself with no luck at all. Link to comment Share on other sites More sharing options...
Whippy Posted October 22, 2008 Share Posted October 22, 2008 Good work sir! Mightily impressed .Tony.. Link to comment Share on other sites More sharing options...
Sam Posted October 23, 2008 Share Posted October 23, 2008 Very nice Little Dumbbell Martin - and interesting description on how the AO works.Sam Link to comment Share on other sites More sharing options...
MartinB Posted October 23, 2008 Author Share Posted October 23, 2008 Very nice Little Dumbbell Martin - and interesting description on how the AO works.SamThanks Sam. I feel like saying I now have the AO sorted and working for me but that would be tempting fate. Once I've had a few more successful runs I will do a write up since it is very interesting technology. Nothing like as hard to use as I've made it appear.! Link to comment Share on other sites More sharing options...
DeanWatson Posted October 23, 2008 Share Posted October 23, 2008 Super colour and detail Martin - I've tried this before with a DSLR but its just so TINY! Link to comment Share on other sites More sharing options...
winfij Posted October 26, 2008 Share Posted October 26, 2008 Nice result there Martin - I tried this one with broadband filters and many hours of exposure, but it was just too faint for my skies. Going narrowband was the right choice...John Link to comment Share on other sites More sharing options...
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