Posts Tagged ‘blades’

Camera Synchronized to Chopper Blades Creates Amazing Illusion

Here’s an old-ish video that’s been making the rounds again lately (viral videos are like viruses — they don’t go away very easily). Titled “Camera shutter speed synchronized with helicopter blade frequency,” it shows what can happen when your camera is synchronized with the RPM of a helicopter’s rotor blades. The resulting footage makes the helicopter look as though it’s just floating in the air!
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Lens Twist Trick: How to Lock a Lens at a Certain Aperture

Modern DSLR lenses don’t usually have aperture rings, and opening and closing the aperture is the camera’s responsibility. If for some reason you need to keep the aperture blades locked in a certain position, the “lens twist trick” can help you do so. Simply untwist the lens from the camera while holding the depth of field preview button.

One practical use for this trick is time-lapse photography. Cameras don’t always close the aperture to exactly the same size every shot, and the slight variation can cause a flicker in the resulting time-lapse video (a problem called “aperture flicker“).

(via planet5d)

Canon 18-55mm Kit Lens Aperture Blades in Slow Motion

Here’s an interesting look at what the aperture blades on a Canon 18-55mm (the kit lens for many DSLRs) look like. The video above shows the blades moving into position at 120fps. This happens every time you shoot a photograph and in the blink of an eye.
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