| Detailed specifications of the Canon Speedlite Transmitter ST-E2 |
| Type | Speedlite transmitter. |
| Compatible cameras | All EOS cameras (flash metering system may differ depending on the camera) |
| E-TTL II autoflash: all EOS digital SLR Camera from the EOS-1D Mark II onward, EOS 30V and EOS 300X. |
| E-TTL autoflash (Type-A cameras): enabled with all EOS SLR cameras from the EOS 50/50E onward (except EOS 88) |
| Manual flash (Type-B cameras): enabled with all other EOS SLR cameras. |
| Wireless Control |
|
| Channel | 4(1,2,3,4) |
| Slave Groups | 1. Without flash ratio control: 3 groups (A,B,C) |
| 2. With flash ratio control: 2 groups (A,B) |
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| Flash ratio control | For A:B ratio: 1:8 to 8:1, in half- step increments or 13 steps |
| High-speed sync | Provided |
| Transmission ready indicator | Red pilot lamp lights |
| Flash Exposure confirmation | Flash exposure confirmation lamp lights in green for 3 sec. after the flash is fired. |
| Wireless Transmission |
|
| Transmission method | Infrared pulse |
| Transmission range (Approx.) | Indoors: 12-15m |
| Outdoors: 8-10m |
| Transmission angle: +/- 40o horizontal, +/-30overtical |
| Transmission wavelength | 750nm and longer (infrared range) |
| AF-Assist Beam |
|
| Linkable AF points | 45-point Area AF (28mm or longer focal length) |
| Effective range (Approx.) | At center: 0.6-10m |
| Periphery: 0.6-5m |
| Power Source |
|
| Internal power | 2CR5 lithium (3V) battery x 1 |
| Battery life | Approx. 1500 times |
| Power Saving | Power off after 90sec. of idle operation (in ON and HOLD mode) |
| General |
|
| Dimensions (W x H x D)(mm) | 62 x 51 x 80mm |
| Weight (without batteries) (g) | 100g |
