anyone heard of this white balance cap???
where to get it around kl , and is there any brand for this?? Additionally how to use it worr?? when i wanna capture the white balance, i put the cap on, point the camera to the light source (i.e sun / light bulb/ florescent light) and capture a custom white balance, then after that the pics all i take will be calibrated rite?? or there is some "skill" to use this white balance cap??

shoot in raw... save u a couple of bucks and get more CF

It's called a White Balance Filter.
Put it at the front of your lens, shoot a pic at the light source.
Then select the pic as your custom white balance.

Used it b4. Same like shooting a white/grey card under the light source.
No big deal.

there's a cheaper way to do it...just use the cover of the soft drink in MC d to cover the lens..and shoot..same effect as well.

ooo so just attach the filter, and shoot the light source ah? what is the room is in a mixed lighting condition?? shouldnt i point the camera at the subject with the filter, then get a custom WB then only shoot the subject?