what is a 2x adapter in photography?

  • Thread starter Thread starter Jane
  • Start date Start date
Typically, a 2x adapter, or more properly a teleconverter, multiplies the focal length of any lens mounted in front of it by two. This is accompanied by a loss of two stops of light.

A flash is just a short, intense burst of light. Typically, it comes from a high voltage discharge of electricity in a Xenon tube, and is synchronized to happen just as the shutter opens.
 
It is simply an adapter that mounts between the body and lens to increase focal length by 2. In other words, a 100mm lens would become a 200mm lens. There is a tradeoff though in less light entering the camera which can make handholding difficult if not impossible.

A flash is a timed burst of light that fires in sync with the shutter of the camera. Most cameras have limits on how fast the shutter can actuate and still be in sync with the flash. Usually 1/200 is the max in newer cameras. 1/60 was common in earlier cameras. Some cameras have leaf shutters in the lens that can sync with the flash at all speeds.

A dedicated flash unit is made for particualar cameras and will meter the light it projects on a scene for proper exposure.

Automatic generic flashes have sensors on the flash itself to read light output, but the camera must be set to specific apertures to work with the flash in auto mode.

There are some basics.

steve
 
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