I'd like to shoot fireworks with my Canon Rebel T4i (EOS 650D / Kiss X6i). Is there a bulb mode on this camera? What different remote-shutter attachments are available?
To use Bulb mode on your T4i, Select Manual <M> exposure mode and move the shutter speed past 30 seconds to bulb. (pp. 113-114 of the T4i Instruction Manual)
The simplest way to shoot fireworks with your Rebel T4i is with a wired remote. The Canon RS60 E3 sells at amazon.com for around $22USD. Generic versions are available for about 1/2 that. The advantages of the wired vs. wireless remotes are:
Get in close and defocus slightly with a telephoto lens to get dramatic effects with fireworks.
Or use a wider lens from further back to get more traditional shots with focus set at infinity.
Yes, you have to set the mode to M and dial the shutter speed past 30s (it will show 'bulb'). You will want some type of remote trigger for this mode. A canon RC-1,5 or 6 is a cheap and reliable IR based remote (I have used the RC-1 for about 7 years and only change the battery once, after about 5-6 years).
You enable the remote by switching to the timer for your shutter mode.