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Cemlyn Bay Stars - updated by Photosbykev Cemlyn Bay Stars - updated by Photosbykev
94 30 second exposures and then lens filter iced over even with a len warmer running.

Uploaded as a 1920px file so you can see some detail and print file being added.

There is a Quadrantid meteor on right hand edge of the frame www.flickr.com/photos/23362014@N06/4245481222/

Canon 7D with 10-22mm lens f4.5 iso 200

Wylfa power station is in the bottom right hand corner.

updated to improve the clarity of the image by processing all of the 94 raw files to tiff files before stacking and final processing
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:iconjpmh21:
jpmh21 Featured By Owner May 9, 2010  Professional Photographer
This beautiful deviation was featured here: [link]
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:iconflyy1:
Flyy1 Featured By Owner Jan 23, 2010  Hobbyist Photographer
I have featured this deviation in my journal... [link]


Hope you don't mind.
:)
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:iconb-a88:
b-a88 Featured By Owner Jan 18, 2010
Hmm, didn't know it was possible to get star trails form separate exposures like that. :D
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 18, 2010  Hobbyist Photographer
it's a good way of controlling light pollution and it gives you some control over the foreground exposure :)
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:iconb-a88:
b-a88 Featured By Owner Jan 19, 2010
Those are very big problems for those types of shots usually. Does it have any different effect on battery life as opposed to one long exposure?
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 19, 2010  Hobbyist Photographer
it helps battery life :) You shoot 30 second exposures with NR turned off and then shoot a dark frame at the end. To blend them together I use Startrails.exe
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:iconb-a88:
b-a88 Featured By Owner Jan 19, 2010
That's good to hear, I was thinking of trying a star trail photo but after researching how to do it I found out it would require a really long exposure which I found out would kill my battery after a few hours. Then not to mention the light pollution here, most everything turns reddish after not very long. :D
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 20, 2010  Hobbyist Photographer
if you take a dark frame at the start of the sequence you can use that as a backup and shoot until your battery dies. Ideally I would take dark frames before and after the sequence and use them both in the post processing
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:iconb-a88:
b-a88 Featured By Owner Jan 20, 2010
It wasn't that long ago that I figured out there was a setting on my camera to have it automatically take a dark frame but I guess that setting doesn't exactly work for this application unless it is one long exposure and then the battery life is a big consideration. I've never really been able to figure out how exactly to do dark frames manually, I guess just take a shot with the lens cap on but then I don't know how exactly to subtract the dark frame, I really should've looked that up before now. :XD:

My biggest problem is getting the stars in focus, it's completely a game of luck with the low light levels and the small viewfinder. The thing that got them in focus the best so far was a smaller aperture but then you lose a lot of the stars from the sky. :hmm:
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 20, 2010  Hobbyist Photographer
a few tips for you :)
1. Use Startrails.exe to compile all of your imae sequence. You can load your dark frames (taken with the lens cap on at the same exposure as your main frames) into Startrails and it will do the subtraction for you.
2. Don't focus on infinity :) Use an online hyperfocal distance calculator to work out the the distance to set your lens to based on it's focal length and aperture so that infinity is in focus and also some of the foreground. With a 10mm lens on my 7D if I focus at about 12' @ f4 inifnity is sharp and some foreground. Using f4 @ iso 200 with 30 second exposures will give you a good starting place for the correct exposure.
3. Before you commit to a long sequence set the camera to bulb and a high iso say 3200iso and shoot a single exposure for 2-3 minutes. This exposure, will normally be overexposed BUT, can be used to check focus, composition and will let you see anything, like power cables, that you might not of seen before starting.

4. Remember to reset your camera and double check ALL the settings before starting the sequence.
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(1 Reply)
:iconra3y-ad:
Ra3y-AD Featured By Owner Jan 18, 2010  Hobbyist Photographer
Amazing :heart:
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:iconclairecollyer:
ClaireCollyer Featured By Owner Jan 17, 2010
Awesome capture.. thank you for sharing.
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:iconafeinphoto-com:
aFeinPhoto-com Featured By Owner Jan 17, 2010  Professional Photographer
Very cool idea but between the power lines, bright power station and satellite running through the pic it just doesnt have the same effect as if it were 'cleaner'. Keep working the idea!

aF
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 17, 2010  Hobbyist Photographer
thank you for the comments on the trails. I work at the power station so it was included delibrately :) . The plane trails are a fact of life in the UK and as long as there aren't too many I tend to leave them in
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:iconafeinphoto-com:
aFeinPhoto-com Featured By Owner Jan 17, 2010  Professional Photographer
Ah, well that makes more sense in a 'location shoot' sense :-) Sure the plant appreciates it!

aF
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:iconsamstewart1:
SamStewart1 Featured By Owner Jan 17, 2010
Wow I cant say lot more, it is fantastic, and if there is any chance you can make a tutorial for this that would be amazing.
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 17, 2010  Hobbyist Photographer
already loaded on my site [link]
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:iconsamstewart1:
SamStewart1 Featured By Owner Jan 17, 2010
oh cool, do you know if there is a version of that program for mac.
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 17, 2010  Hobbyist Photographer
I don't there is a version of Startrails for the mac but there are photoshop actions that do the same thing
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:iconoro-elui:
oro-elui Featured By Owner Jan 17, 2010  Hobbyist General Artist
great.
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:iconlesogard:
lesogard Featured By Owner Jan 10, 2010
absolutely stunning
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:icontwisted-insanity:
Twisted-Insanity Featured By Owner Jan 9, 2010  Student Photographer
Wow! This is absolutely stunning, I hope one day I could witness a familiar scene of this kind in the near future!
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:icontircisia:
Tircisia Featured By Owner Jan 8, 2010  Hobbyist Photographer
Beautiful ! I must try one day...
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:iconheatherwaller-rivet:
HeatherWaller-Rivet Featured By Owner Jan 7, 2010  Professional Photographer
[link] in my gallery:wave:
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:iconvalmar13:
valmar13 Featured By Owner Jan 6, 2010  Professional Photographer
Is the long exposure noise reduction setting set Off?
Very good picture :)
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 6, 2010  Hobbyist Photographer
yes the NR is set to off to reduce the delay between image exposures, I use dark frames, taken before and after the image sequence, for the noise reduction during the processing of the image stack
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:iconvalmar13:
valmar13 Featured By Owner Jan 6, 2010  Professional Photographer
ok thanks, im gone wait for the clear sky now to try it out :D
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:icontherealthalion:
TheRealThalion Featured By Owner Jan 6, 2010  Hobbyist Photographer
Plain awesome! Nuff said! ;-)
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:icontroypiggo:
troypiggo Featured By Owner Jan 5, 2010
Great work. I've been getting into astrophotography this last year or so. Not sure what/how you stacked the images, but have you seen the StarTrails free Windows software specifically for this application?
[link]
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 5, 2010  Hobbyist Photographer
thats the app I use :) I also use a prog called Stellarium which a free planetarium program, great for pre planning images
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:icontroypiggo:
troypiggo Featured By Owner Jan 5, 2010
Yep, that's a good one too. I use Cartes du Ciel as a planetarium, not as pretty as Stellarium, just a personal preference.
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:iconlemnosexplorer:
LemnosExplorer Featured By Owner Jan 5, 2010  Professional Artist
hello kev, happy new year by the way. best wishes to you and your family for 2010 please :heart:

may i ask you if you can provide a link with the lens warmer device here please ?

regards
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 5, 2010  Hobbyist Photographer
Hi Lemnos, it is simply the small hand warmers you can buy from chemists and hiking centres. I've cut the toes off a sock and slipped that over the lens and tuck the warmers inside it. Couldn't be easier :)
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:iconmeihua:
meihua Featured By Owner Jan 5, 2010
This is amazing. :clap:
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:iconmurphoto:
Murphoto Featured By Owner Jan 5, 2010
Your latest pictures make me think that you never sleep, lol. Very nice shot.
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 5, 2010  Hobbyist Photographer
only when I have too :)
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:iconsteelcowboy:
SteelCowboy Featured By Owner Jan 5, 2010  Professional Photographer
Awesome star trails, and we appreciate the effort invested here to bring us this image.
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:iconcecilyandreuartwork:
CecilyAndreuArtwork Featured By Owner Jan 5, 2010  Hobbyist Photographer
Wow, "...processing all of the 94 raw files to tiff files before stacking and final processing", that's a hell of a lot of work! Appreciate your sharing! :worship:
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 5, 2010  Hobbyist Photographer
each Tiff file is 100Mb lol
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:iconcecilyandreuartwork:
CecilyAndreuArtwork Featured By Owner Jan 5, 2010  Hobbyist Photographer
Double WOW! Hope you have a super computer!
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 5, 2010  Hobbyist Photographer
it's a bit quick :) [link] recently updated to run a 60Gb ram drive as the primary drive and 8Gb of memory
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:iconcecilyandreuartwork:
CecilyAndreuArtwork Featured By Owner Jan 5, 2010  Hobbyist Photographer
Glad to know that you do own a super computer. I just realized such thing as "ram drive", which uses flash memory to store data as opposed to magnetic disk. The fetching and writing latency is short, hence the higher throughput. Way to go! :thumbsup:
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:iconxerces:
Xerces Featured By Owner Jan 5, 2010  Professional Artisan Crafter
Beautiful capture! the star tracks look wonderful :-)
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:iconrawpoetry:
RawPoetry Featured By Owner Jan 4, 2010   Photographer
Wow that is some impressive work my friend. Very well done.
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:iconbear48:
bear48 Featured By Owner Jan 4, 2010  Professional
so cool
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:icondanuk86:
danUK86 Featured By Owner Jan 4, 2010   General Artist
nice work :nod:
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:iconkeischa-assili:
Keischa-Assili Featured By Owner Jan 4, 2010  Hobbyist Photographer
nice photo
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:icondavincipoppalag:
davincipoppalag Featured By Owner Jan 4, 2010  Hobbyist General Artist
very cool tracks!
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:icongacek:
gacek Featured By Owner Jan 4, 2010  Hobbyist Photographer
what is this dotted line coming from left up corner to the right edge?
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:iconphotosbykev:
Photosbykev Featured By Owner Jan 4, 2010  Hobbyist Photographer
it's the navigation strobe lights on a passing aircraft
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