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The Speedlite 420EX is an external flash formerly made by Canon. The Speedlite 420EX is one of Canon's older mid-range flashes, being replaced by the 430EX in 2005. It was primarily intended for users wanting to step up from the entry-level flashes, as well as for use as a slave flash along with the more advanced Speedlite 550EX flash.
Nikon and Canon and Sony versions Can update firmware over USB Nissin Di866 [16] 60m/198 ft @105mm (overrated) PC 18, 24-105mm 1/1-1/128, 1/3 EV i-TTL/CLS (Nikon) E-TTL/E-TTL II (Canon) yes yes 5.5sec yes, both i-TTL and basic slave Nikon and Canon versions Can update firmware over USB Has sub-flash Pentax AF-200FG [17] 20m No 28mm 1/1, 1/2, 1/ ...
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A full-power flash from a modern built-in or hot shoe mounted electronic flash has a typical duration of about 1ms, or a little less, so the minimum possible exposure time for even exposure across the sensor with a full-power flash is about 2.4 ms + 1.0 ms = 3.4 ms, corresponding to a shutter speed of about 1 ⁄ 290 s. However some time is ...
The flash unit sets up a circuit between shoe and contact—when it is completed by the camera, the flash fires. In addition to the central contact point, many cameras have additional metal contacts within the "U" of the hot shoe. These are proprietary connectors that allow for more communication between the camera and a "dedicated flash".
The best Canon telephoto lenses make it easier to fill the frame with subjects and get closer to the action to ensure you capture stunning photos. You can use these zoom lenses to shoot sports ...