FLASH REVIEW
Camera Flash / Speedlight: Canon 90EX Speedlite Flash Unit Flashgun
| Model Name: Canon 90EX Speedlite Flash Unit Flashgun | |
|---|---|
| Image: |  |
| Fivercam Price (used) UK | |
| eBay Price (used) UK | |
| Release Date | |
| Strenght / Power | |
Guide Number (ISO100, meters)  | 30' / 9.14 m ISO 100 |
| Power Level Switching (Vari-power Range) | |
| Head & Coverage | |
| Bounce (Up-Down) Head Movement | None |
| Swivel (Rotation) Head movement | None |
| Focal Length Coverage | 84° - mm (Full Frame) |
| Auto Zoom Head | |
| Flash Related Functions | |
| Flash Durations | |
| Flash Modes(TTL) | |
| Flash Exposure Compensation / Correction | -3 EV to +3 EV (in 1/3 EV steps) In-camera control |
| Secondary Illumination | |
| Wireles Flash | |
| Wireless Operation | Method: Optical Pulse Distance: Up to 22.97' / 7 m |
| Wireless Groups | 4 |
| Wireless Channels | 3 |
| Remote Timing Modes | |
| Other Features | |
| Mount | Hot-shoe mount flash |
| Off Camera Terminal / External Connectors | |
| Included Accessories | |
| Other Functions | |
| Power Source & Recycle Time | |
| Power Source - Batterry | 2 x AAA Alkaline, Lithium, Rechargeable NiMH Batteries |
| External Power | |
| Minimum Recycle Time (Charging time between shooting) | Approximately 0.1 to 5.5 Seconds |
| Battery Life | Approx. 100 (flashes per set of batteries) |
| Dimensions & Weight | |
| Dimensions | 1.7 x 2.0 x 2.6" / 44.3 x 52.0 x 65.0 mm |
| Weight | 1.76 oz / 50 g |
| More Details or Support Website: | Link |
| Item 1 | |
Fivercam Wiki information:
There are three ways to trigger off-camera flash units wirelessly: via infrared, radio signals or a hybrid method that involves both infrared and radio. The infrared system works like the TV remote; there need to be a direct line of sight for the signal to reach the destination. The radio signal has no line-of-sight limitations, but comes at a rather high cost. The hybrid system simply takes the infrared signal from the commander, converts it over to radio and then converts it back to infrared on slave units.
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