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/sci/ - Science & Math

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>> No.9499252 [View]
File: 2.77 MB, 480x270, SpaceX Starman Earth 3.webm [View same] [iqdb] [saucenao] [google]
9499252

>>9499053
Stars are too dim to be seen in the camera while there is something far brighter in the frame. It auto adjusts its sensitivity to whatever is brightest and everything else gets darker as a result. For something as dim as stars, you need to take a long exposure without anything else brighter than them in the frame.

In order to get both stars and something else in the same frame you need to do exposure bracketing. That's taking long and short exposures then using software to join both of them to make an HDR image that shows both the bright and dark stuff at the same time.

With video, the camera doesn't do that and just goes off whatever is brightest. That's why when something even brighter comes on screen it is super bright then the camera adjusts and tons down the light sensitivity. You can see this happening in this webm as the bright Earth comes into view. It is almost pure white until the camera tones down the light. at the same time, the car and Starman all get darker.

If you could see both the moon and stars in a video and the moon looked normal instead of super bright and washed out it would mean it was fake, like what you see in Hollywood movies.

>> No.9493916 [View]
File: 2.77 MB, 480x270, SpaceX Starman Earth 3.webm [View same] [iqdb] [saucenao] [google]
9493916

>>9493806
Wish it was smoother, but when the Earth comes into full view it starts to stutter every time.

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