With the growing popularity of the Samsung SCC-A2333 and SCB-4000 cameras for 'Live' astrovideo and Broadcasting I have made a Video Tutorial of how to remove the factory fitted Infrared Filter from these cameras.
The Samsung SDC-435 Camera's IR Filter comes out easily by undoing a few screws, but the SCC-A2333 and the SCB-4000 have a very complicated mechanically driven worm-drive/Filter Frame setup.
Here is the Video:
HERE
For Astro work you will need to add a high quality Imaging UV+IR filter to the nosepiece when using a Refractor, or an IR filter when using a Reflector.
I use one of these on my Refractors:
Astronomiks
If you need further help, please ask here.
Good Luck.