Flashes
Once you're indoors at a party or a wedding, the flash on you camera won't always be bright enough to illuminate subjects in darker settings. And when that time comes, you'll need to invest in a flash. In most situations, your flash will be just fine. An external flash can often improve a picture in many ways and also produce some pretty nifty effects with a few basic techniques. The main differences between the models are the recycle times (time between flash firing) and strobe mode.
Links to Flash Resources:
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Canon 580EX Speedlite
The top of the line Canon flash:
Auto Distance Range: Full TTL at all apertures
Auto f/Stops: Full TTL at all apertures
Autozoom range: 24-105mm
Angle of coverage: 84 degrees to 23 degrees
Bounce Head: Yes
Swivel Head: Yes
Strobe Mode: Yes
Recycle Time: 6 seconds (normal) / 3 seconds (rapid)
Power Source: Four 1.5-volt AA batteries
Wireless TTL Slave Flash: Yes
Weight: 13.2 oz
Buy it now:
Adorama.com
Amazon.com
Canon 550EX Speedlite
Auto Distance Range: Full TTL at all apertures
Auto f/Stops: Full TTL at all apertures
Autozoom range: 24-105mm
Angle of coverage: 84 degrees to 23 degrees
Bounce Head: Yes
Swivel Head: Yes
Strobe Mode: Yes
Recycle Time: 8 seconds (normal) / 4 seconds (rapid)
Power Source: Four 1.5-volt AA batteries
Wireless TTL Slave Flash: Yes
Weight: 14.2 oz
Buy it now:
Adorama.com
Amazon.com
Canon 420EX Speedlite
Auto Distance Range: Full TTL at all apertures
Auto f/Stops: Full TTL at all apertures
Autozoom range: 24-105mm
Angle of coverage: 84 degrees to 23 degrees
Bounce Head: Yes
Swivel Head: Yes
Strobe Mode: No
Recycle Time: 7 seconds (normal) / 4 seconds (rapid)
Power Source: Four 1.5-volt AA batteries
Wireless TTL Slave Flash: Yes
Weight: 10.6 oz
Buy it now:
Adorama.com
Amazon.com
Canon 220EX Speedlite
Auto Distance Range: 2.3 to 51.5 feet
Auto f/Stops: Full TTL at all apertures
Autozoom range: 24-105mm
Angle of coverage: 75 degrees
Bounce Head: No
Swivel Head: No
Strobe Mode: No
Recycle Time: 4.5 seconds
Power Source: Four 1.5-volt AA batteries
Wireless TTL Slave Flash: No
Weight: 5.6 oz
Buy it now:
Adorama.com
Amazon.com