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PostPosted: Fri May 03, 2013 11:15 pm 
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Lets say on my test shots I was at 30 sec exp, f5.6 and ISO 200. And wanted to brighten the foreground..

Would it be better to open the aperture to let more light in, or raise my ISO to raise the sensitivity?


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PostPosted: Fri May 03, 2013 11:33 pm 
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You can treat the foreground independently from the trails. Take a foreground shot exposed for the foreground, and you can blend it with the trails after. While I haven't tried it myself, you can also try light painting using a torch and long exposure. Obviously depends on the size of the foreground subject.

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PostPosted: Sat May 04, 2013 9:39 am 
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popo, slightly o/t to the original question, but when is it worth taking a seperate dark shot to blend into these night sky, star shots?

Is it dependant on taking a certain number of star-shots before it's of any use? (sort of a 5/1 ratio type of thing)

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PostPosted: Sat May 04, 2013 10:57 am 
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What exactly do you mean by dark shot?

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PostPosted: Sat May 04, 2013 11:08 am 
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I've seen mentioned many times that for stacking, don't folk take a black/blank image (cap on the lens?) to keep the night sky dark when they stack images, or is it just relevant to you astro/deep sky guys?

Sorry if I completely misunderstand, i'm easily confused. :lol:

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PostPosted: Sat May 04, 2013 12:08 pm 
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Single long exposure, in minutes or hours, generally requires an element of noise reduction. Done in camera, this is a 'dark' shot during which the sensor is on, but no light enters the camera.

So this affects battery life considerably and also you cannot see the end image for a long time period.

Or stacking 30 second exposures requires a single 'dark' shot or 30 seconds.


Last edited by dubaiphil on Sat May 04, 2013 12:47 pm, edited 1 time in total.

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PostPosted: Sat May 04, 2013 12:11 pm 
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Thanks Phil. 8)

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