Why did my Milky Way photo come out washed out and disappointing?
Asked 7/27/2014
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2 answers
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I tried photographing the Milky Way using exposure formulas for night sky photography.
Camera/lens/settings:
- Nikon D7000
- Tokina 11-16mm f/2.8
- 11mm
- f/2.8
- 35 seconds
- ISO 1250
The image came out bright, washed out, and the Milky Way is not visible. I was shooting from a location about 200 meters above a city, and the lower part of the scene shows strong city light below.
Were my exposure settings wrong, or is this mainly caused by light pollution?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
12y ago
2 Answers
11
Yes, you have way too much light pollution. It looks like the sky is Bortle class 7 or worse
Class 7: Suburban/urban transition. The entire sky background has a vague, grayish white hue. Strong light sources are evident in all directions. The Milky Way is totally invisible or nearly so. M44 or M31 may be glimpsed with the unaided eye but are very indistinct. Clouds are brilliantly lit. Even in moderate-size telescopes, the brightest Messier objects are pale ghosts of their true selves. The naked-eye limiting magnitude is 5.0 if you really try, and a 32-cm reflector will barely reach 14th magnitude.
You need to move at least 50 km away from big cities to get dark enough skies to see the Milky Way well. Even at that distance away, you will still have a lot of light pollution causing the sky to turn blue in long exposure pictures. The milky Way will then be visible in the picture, but it will look like you somehow shot the picture during daytime or dusk.
A truly dark sky is only possible when you are at least a few hundred km away from cities, when the Moon is not in the sky and when the Sun is at least 18 degrees below the horizon. E.g. at 50 degrees Northern Lattitude around 21 june, the Sun does not sink far enough below the horizon, at local midnight you'll still have astronomical twilight. The sky may appear to look very dark with many faint stars visible, but weak nebulae will be drowned out.
Originally by user28357. Source · Licensed CC BY-SA 4.0
user28357
12y ago
0
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This is mainly a light pollution problem, not a major exposure mistake.
Your settings are in the normal range for a first Milky Way attempt: wide lens, wide aperture, long exposure, moderate ISO. But the bright city glow is illuminating the sky and clouds, which washes out faint detail like the Milky Way. If the clouds are bright, that’s a strong sign the sky itself is being lit by the city.
From a location overlooking a city, especially if the glow is obvious, the Milky Way may be very weak or effectively invisible. To get a much better result, you generally need a significantly darker site, often far from major urban areas. Even distant towns can still brighten the sky.
Also keep in mind that moonlight can have a similar effect, so shoot on a moonless night if possible.
In short: your technique is broadly fine, but the sky is too bright. The biggest improvement will come from going to a darker location and avoiding moonlight.
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