
New Naked Eye Comet - 17/P Holmes
- daveg
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- JohnMurphy
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- Super Giant
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Replied by JohnMurphy on topic Re: New Naked Eye Comet - 17/P Holmes
How long an exposure?
John Murphy
Irish Astronomical Society
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- daveg
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Replied by daveg on topic Re: New Naked Eye Comet - 17/P Holmes
13x 1min exp. flats and darks applied.
Initial processing in ImagesPlus and then numerous layer (Histogram, curves, unsharp mask, gaussian blur) adjustments in Paint Shop ProX.
Dave Gradwell
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- John D
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- phoenix
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- Red Giant
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Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes
16" ODK (incoming), Mesu Mount 200, APM TMB 80mm, SXV H16, SXV H9
J16 An Carraig Observatory
ancarraigobservatory.co.uk/
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- wellbuttie
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Replied by wellbuttie on topic Re: New Naked Eye Comet - 17/P Holmes
.........
"Technology is a way of organising the universe so that man doesn't have to experience it."
steviestargazer.ivisionireland.com
www.deiseastronomy.com
photo.ivisionireland.com
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- dave_lillis
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- Super Giant
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Replied by dave_lillis on topic Re: New Naked Eye Comet - 17/P Holmes
Chairman. Shannonside Astronomy Club (Limerick)
Carrying around my 20" obsession is going to kill me,
but what a way to go.

+ 12"LX200, MK67, Meade2045, 4"refractor
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- paulevans
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- Frank Ryan
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Replied by Frank Ryan on topic Re: New Naked Eye Comet - 17/P Holmes
Shannonside Astronomy Club __________________________________________
Meade ETX-125PE, Bresser 10 x 50 Binos & Me Peepers
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- paulevans
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- Frank Ryan
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Replied by Frank Ryan on topic Re: New Naked Eye Comet - 17/P Holmes
It's always handy to see the info,
Shannonside Astronomy Club __________________________________________
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- paulevans
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Replied by paulevans on topic Re: New Naked Eye Comet - 17/P Holmes
The three TIFFs along with a TIFF Dark Frame made on another day (purists will wince at this point

Ideally I'd have had 10 or more frames to stack but I had a sound desk to operate in church so had to pack up. When I got back the sky had completely clouded over

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- Seanie_Morris
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Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes

Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
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- Keith g
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Keith..
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- paulevans
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- Seanie_Morris
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Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes
Seanie.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
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- daveg
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Replied by daveg on topic Re: New Naked Eye Comet - 17/P Holmes
Dave Gradwell
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- phoenix
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Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes
Highlander 'There can be only one'
Got ya. Hope you've put that new camera to good use

16" ODK (incoming), Mesu Mount 200, APM TMB 80mm, SXV H16, SXV H9
J16 An Carraig Observatory
ancarraigobservatory.co.uk/
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- dave_lillis
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Replied by dave_lillis on topic Re: New Naked Eye Comet - 17/P Holmes
Isnt it a pity we cant reduce the iso of the wind.
Dave Gradwell
You said it Dave !
Chairman. Shannonside Astronomy Club (Limerick)
Carrying around my 20" obsession is going to kill me,
but what a way to go.

+ 12"LX200, MK67, Meade2045, 4"refractor
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- paulevans
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Replied by paulevans on topic Re: New Naked Eye Comet - 17/P Holmes
Yes, in the ideal situation I shoot at ISO800, however the recent conditions have been such that the longer exposures that entails haven't been practical - either because of the wind as you suggest, or because I've had to grab shots through relatively small gaps in rainy clouds and have used a static tripod instead of a driven mount. The ISO3200 of my camera isn't ideal but it's not bad, particularly if I can get a few lights and a dark or two to stack up, and being only 6 million pixels the pixel size is quite big - indeed in regular use my DSLR is no more noisy at ISO3200 than my "bridge" camera - an 8 million pixel Minolta Dimage A2 - is at ISO400!
I'm waiting for some of those crystal clear still nights where I'll be able to get a good stack of 2min exposures at ISO800 and put them all together into something spectacular!
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- paulevans
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Replied by paulevans on topic Re: New Naked Eye Comet - 17/P Holmes
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- phoenix
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Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes
16" ODK (incoming), Mesu Mount 200, APM TMB 80mm, SXV H16, SXV H9
J16 An Carraig Observatory
ancarraigobservatory.co.uk/
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- JohnMurphy
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Replied by JohnMurphy on topic Re: New Naked Eye Comet - 17/P Holmes
The ongoing sequence (all shots are the same scale):
26th Oct
28th Oct
2nd Nov
16th Nov
The saga continues...........it's now more than 1.4 Million Kilometers across - not bad for something that started out at about 3Km across, its now the biggest object in our solar system.
John Murphy
Irish Astronomical Society
Check out My Photos
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- paulevans
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- albertw
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Replied by albertw on topic Re: New Naked Eye Comet - 17/P Holmes
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