What different type of SD Cards are there?

I've heard some are "faster" when recording the pictures and downloading. Is this true? What should I look for? It seems some of my SD cards show images faster that others but maybe its the battery strength at the time?

What different type of SD Cards are there?
Maybe.





The ability of a camera to use the "speed" of a particular card is part of the cameras design called write acceleration (WA). As of February of 2007, no Canon cameras support WA, indeed only a few camera companies include WA in their electronics ... yet.





If your camera has a video mode and can shoot for extended periods of time, a card with a 40x rating is plenty.





Downloading has to do with the speed of the port you are using not any "speed" number on a memory card.





USB 1.1 = 12 Mbit/s


USB 2.0 = 480 Mbit/s


Firewire 400 = 400 Mbit/s


Firewire 800 = 800 Mbit/s


ExpressCard/34 or 54 = 2.5 Gbit/s (found on newer notebooks)





The voltage that powers your camera is regulated, so there is always the right amount of power being supplied to the camera until the batteries fail





The "dimming" of a flashlight (or torch) will not happen on electronic devices like portable CD players, MP3 players, cell phones or digital cameras.