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Star Trails at East Point Lighthouse
Oct 16, 2021 11:04:26   #
tonyi Loc: Oxford, Pennsylvania
 
First attempt at astrophotography. Got a couple of shots of the Milky Way (previous post) and this Star Trail shot. Let me know what you think.


(Download)

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Oct 16, 2021 20:55:23   #
Ballard Loc: Grass Valley, California
 
tonyi wrote:
First attempt at astrophotography. Got a couple of shots of the Milky Way (previous post) and this Star Trail shot. Let me know what you think.


Very Nice star trails. A few hot pixels are visible in the lighthouse and subtracting a dark frame might help remove this type of noise in the image.

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Oct 17, 2021 09:35:20   #
abc1234 Loc: Elk Grove Village, Illinois
 
Ballard wrote:
Very Nice star trails. A few hot pixels are visible in the lighthouse and subtracting a dark frame might help remove this type of noise in the image.


The picture is very nice. I agree about the blown out highlights. What do you mean by "dark frame"? I would have exposed on picture on the highlights and then masked off the final picture and dropped in the properly exposed one.

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Oct 17, 2021 10:27:18   #
RWCRNC Loc: Pennsylvania
 
Nice

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Oct 17, 2021 14:27:51   #
bwana Loc: Bergen, Alberta, Canada
 
tonyi wrote:
First attempt at astrophotography. Got a couple of shots of the Milky Way (previous post) and this Star Trail shot. Let me know what you think.

Nicely framed. Good focus / stars, although the stars are missing color.

bwa

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Oct 17, 2021 21:34:54   #
Ballard Loc: Grass Valley, California
 
abc1234 wrote:
The picture is very nice. I agree about the blown out highlights. What do you mean by "dark frame"? I would have exposed on picture on the highlights and then masked off the final picture and dropped in the properly exposed one.


With long exposures thermal noise can be seen in images as hot pixels. One way to remove this thermal noise is to take a dark frame and subtract it from the image). This basically entails taking a picture at the same temperature and for the same length of time as the original shot only with the lens cap on (a picture in the dark) and subtract it from the original. For Astrophotography I actual take multiple dark frames and average them together to remove the thermal noise.

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Oct 18, 2021 05:55:11   #
tonyi Loc: Oxford, Pennsylvania
 
Thank you all for the advice.

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