Since it seems like half of the community here uses a 550D, I thought I'd share that there's now a magic lantern firmware available for your camera.
For those that don't know, installing Magic Lantern on your camera gives you:
* GUI menus: press the ERASE button to display them
* Bit rate control (QScale parameter) for the H.264 encoder
* Zebra stripes for overexposed / underexposed areas
* Spotmeter, histogram
* Cropmarks (16:9, Cinemascope, Fisheye)
* Simple intervalometer
* Trap Focus: camera takes a picture when something comes in focus
* Wireless trigger with the LCD face sensor & your own hand
* AE bracketing (like on 5D2 ML)
* Rack focus
* Stack focus (Live View only)
* Lens data computation
* Onscreen audio meters
* Manual audio gain, selectable input source, disable AGC and digital filters
* Display time remaining during video recording
* Debug functions (display CMOS temperature, screenshot, logging)
They also have a disclaimer:
All the 5D guys that use it love it though. And, it's free!
http://magiclantern.wikia.com/wiki/550D
PS: I'm in no way affiliated, and it's free software so hopefully this isn't considered promotion?
For those that don't know, installing Magic Lantern on your camera gives you:
* GUI menus: press the ERASE button to display them
* Bit rate control (QScale parameter) for the H.264 encoder
* Zebra stripes for overexposed / underexposed areas
* Spotmeter, histogram
* Cropmarks (16:9, Cinemascope, Fisheye)
* Simple intervalometer
* Trap Focus: camera takes a picture when something comes in focus
* Wireless trigger with the LCD face sensor & your own hand
* AE bracketing (like on 5D2 ML)
* Rack focus
* Stack focus (Live View only)
* Lens data computation
* Onscreen audio meters
* Manual audio gain, selectable input source, disable AGC and digital filters
* Display time remaining during video recording
* Debug functions (display CMOS temperature, screenshot, logging)
They also have a disclaimer:
Even with all the testing this version has received, nobody can
guarantee it is bug-free. There is still a small risk in using this
software, and we want to fix all the bugs and improve it. Please read
the installation instructions carefully!
All the 5D guys that use it love it though. And, it's free!
http://magiclantern.wikia.com/wiki/550D
PS: I'm in no way affiliated, and it's free software so hopefully this isn't considered promotion?