The Canon Speedlite Transmitter ST-E2 is a clip-on transmitter designed for a wireless flash system. This master control device works with the Speedlite 430EX II, 550EX and 580EX II. The ST-E2 features flash ratio control with A:B ratios for a range from weak fill flash to strong flash.
The Speedlite Transmitter ST-E2
The Speedlite transmitter attaches to the camera body's hot shoe that normally holds the external flash unit. This transmitter has a transmission range up to 49.5 feet away indoors or up to 33 feet away outdoors. When shooting in the dark makes autofocus difficult, the autofocus-assist beam fires to light a range from 30 feet in the center to 16.5 feet in the periphery.
ST-E2 Specifications
The ST-E2 operates with a high-speed sync mode. A test transmission button confirms the slave operation. The ST-E2 weighs 3.5 ounces, excluding the lithium battery. The dimensions are 2.4 inches wide by 3.1 inches deep. Compatible Canon cameras include the Type A EOS with electronic, through-the-lens metering and autoflash, as well as the Type B EOS cameras with manual flash.
Canon Speedlite 430EX II
The ST-E2 sets the Speedlite 430EX II as a slave unit. The Speedlite 430EX II provides a normal flash range up to approximately 79 feet at ISO 100 with an EF 50mm f/1.4 lens. The flash head rotates from 0 to 90 degrees in five settings. The flash recycle is almost silent. The Speedlite 430EX II features a compact body weighting 11.6 ounces without batteries.
Canon Speedlite 550EX
The Canon 550EX provides a more powerful flash than the 430EX II. The AF assist beam links to 45 focusing points. This unit has a transmission range of approximately 49 feet indoors to 32 feet outdoors. The flash range with a 50 mm f/1.4 lens and ISO 100 setting is from 1.6 to 100 feet.
Canon Speedlite 580EX II
The 580EX II includes an AF-assist beam with an effective range from 2 to 32.8 feet at the center and a range from 2 to 16.4 feet at the periphery. For wireless flash, this unit has a transmission range of approximately 39 to 49 feet indoors, and 26 to 32 feet outdoors. This flash measures 3 inches wide, 5.4 inches high and 4.5 inches deep. The body is larger than the 430EX II, weighing 13.2 ounces without batteries.
Tags: Speedlite 430EX, Canon Speedlite, from feet, range from, approximately feet
