Can I remove the IR filter on the lens to get the IR function?
Sometimes, lol ....
With some lens its possible... and others its not.
The major problem is that the basic camera whilst being fantastic value for money, is not able to be all things to all men cos to keep the price down the IR has to suffer, there are ways around the problem but as it stands the camera is either a day cam or a night cam.. not both.
The simple cure is to 1. change the lens to one that is not IR blocking, and 2. remove the board and fit a switchable filter (plug that into the existing 2 pin socket on the board) .... but with simple comes the major major issue that if you have the narrow depth case (13mm) then it aint going to fit back in, lol
Sooooooooo... 3. Order a different case (21mm)
Put it all together and you will have a 'top-21' that is color corrected for day, and will also see IR at night.. may be actually best to just build it from scratch, then you will have the options of 1.3MP or 2MP which is better than the std version.