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rdking647

(5,113 posts)
Tue Aug 11, 2015, 10:00 AM Aug 2015

expose to the right for the night sky

i was out last night trying to get a shot of a meteor (i got one and will post it later). while i was there i was using a technique called expose to the right for the night sky

this is an example of what it is

basically it means when you take a photo you want the histogram pushed to the right,ideally as much as you can with out clipping the highlights. then you edit it in lightroom to bring out detail. the photo will look overexposed when you look at it on your camera
here is an example.
this is the shot straight from the camera
this is from reimers ranch. its iso 3200,f2.8 for 30 seconds. its not the greatest shot since i was aiming for meteors instead of something like the milky way



you will see it looks overexposed heres the same photo after some quick lightroom work. I adjusted the white balance to 3800,brought contrast up 98,highlights down 63,in the curves section i brought darks down 39 and shadows 7. i raised the dehaze slider to 48
in this one you can even see the andomeda galaxy which is almost lost in teh glare in the first shot



all in all it was 2 minutes of lightroom work.

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expose to the right for the night sky (Original Post) rdking647 Aug 2015 OP
Wow! That's amazing and gorgeous! CaliforniaPeggy Aug 2015 #1
Thanks. I think I will try some night sky images. alfredo Aug 2015 #2
heres another example rdking647 Aug 2015 #3
Great explanation and examples! ManiacJoe Aug 2015 #4
the rule for avoiding star trails rdking647 Aug 2015 #5

ManiacJoe

(10,138 posts)
4. Great explanation and examples!
Thu Aug 13, 2015, 05:17 PM
Aug 2015

The one thing we need to be careful about is the shutter speed. 20-30 seconds is usually OK for wide-ish lenses. However, depending on the focal length of the lens, you can start to get star trails if you go too long in the shutter speed.

 

rdking647

(5,113 posts)
5. the rule for avoiding star trails
Fri Aug 14, 2015, 09:56 AM
Aug 2015

600/effective focal length is the longest you can shoot without star trail. by effective focal length that depends on whether you have a crop sensor or a full frame.
for example a 50mm on a full frame means a 12 second exposure on a crop sensor 8 seconds.
some people use a rule of 500/focal length but ive found 600/focal length works pretty well especially if your not cropping.

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