Is it safe to zoom the lens during a long exposure for a zoom-blur effect?

Asked 5/22/2015

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I like the creative effect you get by zooming the lens in or out while the shutter is open. It produces a dramatic zoom-blur look, but I’m concerned about whether doing this could damage a DSLR camera or zoom lens. Is this technique generally safe, and are there any downsides to be aware of?

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Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

11y ago

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Provided your lens isn't a power zoom (fairly rare, these lenses have motors that drive the zoom mechanism), then no you will not damage either camera or lens.

Originally by user1375. Source · Licensed CC BY-SA 4.0

user1375

11y ago

AI Answer

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Yes—on a normal manual zoom lens, this technique is generally safe for both the camera and the lens. Moving the zoom ring during an exposure does not normally harm a DSLR or the lens, and it’s a well-known creative technique.

The main caution is dust: when a zoom lens changes length, it can move air in and out of the lens/body area, which may slightly increase the chance of dust reaching the sensor. That’s usually the worst realistic downside, not mechanical damage.

If your lens is a power zoom, it’s a little different because the zoom is motor-driven, but for typical DSLR zoom lenses there’s no special risk in using the effect occasionally or even regularly.

So: safe to do, just keep normal good practice for dust control and sensor cleaning if needed.

Is it safe to zoom the lens during a long exposure for a zoom-blur effect?

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