CANON 420EX SPEEDLITE MANUAL PDF

Other Products Other Products. Visit our online store and buy with confidence. Canon Speedlite EX Photography adventures to inspire your creativity. I have read and understand the information above, and wish to download the designated software.

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White balance Flash: Speedlite compatibility When the first camera with evaluative autoflash metering was launched, EX-series Speedlites were introduced to make use of the E-TTL metering. When Canon introduced digital EOS models, they omitted the flash sensors in the base of the camera the sensor reflects light differently to film. Canon updated E-TTL flash metering in These models allow the viewfinder sensors to be used for both ambient and flash readings. Type A film cameras also include sensors that can read flash illumination off the film during an exposure, so EZ-series Speedlites can be used with A-TTL autoexposure.

This may seem complicated, but if you are using an EOS digital camera all you really need to know is that it is only compatible with EX-series Speedlites. Left: Type B cameras have flash sensors in the bottom of the camera body. Light is reflected down to the sensors by a secondary mirror hinged behind the main reflex mirror.

The centre of the reflex mirror is semi-silvered, allowing light through to the secondary mirror. Centre: Type A cameras have sensors in the viewfinder area that read both ambient and flash illumination. These sensors operate with EX-series Speedlites. They only have sensors in the viewfinder area, so can only be used with EX-series Speedlites. Power control Autoflash means that a flash gun gives just the right amount of light for correct exposure. It could do this by altering the power of the flash, increasing or decreasing the brightness as you change the distance of the camera from the subject.

But this does not happen. Instead, Speedlites increase or decrease the duration of the flash as the subject distance changes. The brightness of the flash remains constant. However, even a long Speedlite flash is very brief and you are unlikely to notice much difference between short and long electronic flash exposures either as you shoot, or in the results.

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