How can I create motion blur or long-exposure effects with a smartphone or tablet?
Asked 2/16/2016
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I want to create still photos where moving subjects look blurred, like a sense of rapid motion in a single image. What is this technique called, and how do I reproduce it? Can this be done with an iPad or Android phone using a free app, or do I need a camera with manual controls?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
10y ago
2 Answers
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Motion blur?
How to reproduce that? On a retouching software you go to... Effects > Motion blur... Normally you need to work in a specific layer.
If you are refering to a photo you simply use a slow shutter speed. How low? depends on how fast the object is moving, how close you are to that subject so what is the relative distance you need on the framing to be covered.
It is usefull to use a tripod so the only thing moving is the subject and not all the image.
If you are the one moving, is usefull to fix the camera to a reference, for example a helmet of a biker.
On an automated camera like a phone, try taking the picture on a low light situation. That is the only thing you can do. You could try to use ND filters. No need for a free app.
Originally by user37321. Source · Licensed CC BY-SA 4.0
user37321
10y ago
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Generated from our catalog & community — verify before relying on it.
The effect is usually called motion blur, often made with a long exposure or slow shutter speed.
To create it in-camera, the shutter needs to stay open long enough for the subject to move while the background stays sharp. The exact shutter speed depends on how fast the subject is moving, but something around 1/15 second can be a starting point for moderate movement.
Helpful tips:
- Keep the camera steady with a tripod or solid support.
- Use low light, low ISO, or an ND filter so the camera can use a slower shutter speed without overexposing.
- If your phone has a manual/pro mode, set shutter speed and ISO yourself.
- If the device is fully automatic, shooting in dim light is the main way to encourage a slower shutter.
You can also add simulated motion blur later in editing software, but that is a post-processing effect rather than a true long exposure.
So yes, it is possible on some smartphones and tablets, especially if they offer manual exposure controls or long-exposure modes.
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