Type: 550EX-dedicated, clip-on Speedlite transmitter with direct contacts Compatible Cameras: Type A EOS cameras (E- TTL, autoflash); Type B EOS cameras (Manual flash) Channels: 4 Flash Ratio Control: For A:B ratio: 1:8 to 8:1, in half- step increments or 13 steps High- Speed Sync (FP flash): Enabled with high-speed sync mode Slave Operation Confirmation: With test transmission button.
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(Slave A fires followed by slave B at 1/64 output.) Flash Exposure Confirmation:
Before flash fires during FE lock Adequate flash exposure indicated by the flash exposure level icon lit in the viewfinder. Insufficient flash exposure indicated by the flash exposure level icon blinking in the viewfinder. After flash fires ST-E2's flash confirmation lamp lights in green for 3 sec.
Wireless slave SE mode cancellation: Cancels when the test transmission button or FE lock botton is pressed to turn on the slave unit. Wireless Transmission: Infrared pulse Transmission Range: Indoors: Approx. 12-15 meters/39.4 - 49.2 ft; Outdoors: Approx. 8-10/ 26.2-32.8 ft Transmission Coverage: ±40° horizontal and ±30° vertical
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Weight & dimensions
Weight
Weight of the product without packaging (nett weight). If possible, the nett weight is given including standard accessories and supplies. Please, note that sometimes the manufacturer is giving a too commercial interpretation of product weight, by leaving out the weight of accessories and/or supplies.
100 g
Dimensions W x D x H
Dimensions of the produkt (Width x Depth x Height) in millimeter.
62 x 80 x 51 mm
Energy management
Number of batteries supported
1
Power supply type
The power supply (internal/external) type with which the product works. PFC = Power Factor Correcting. CE = CE brand compatible. If multiple values (Watt) are given it is often for low line versus high line conditions. Multiple power supplies are used for redundancy. When an extra power supply is optional this is indicated by mentioning the maximum number. Power supplies can be Hot Plug or non-Hot Plug.
