anzycpethian wrote:Can anyone tell me if I need any special equipment to make B/W Infrared-pictures (in daylight) through a Sony DSC-H9?
Do I need for example a IR-filter for the lens?
Yes, you need a IR filter, the most common one used in the market today - at least in my country is the Hoya R72, relatively inexpensive, gives you colour IR, but can easily desaturate it if you're going for B&W infrared pictures.
As mentioned, you already need a tripod, though with the night shot mode and what the IR regulars on another forums tell me, you should be able to hand hold when the night shot mode is active, just that there are restrictions as to what you can do. If you want full control get a tripod.
Your camera is a prosumer, not a DSLR, so you'll be able to preview your images through the EVF/LCD somewhat. Please make sure you set a custom WB for best results - with the filter on, fill your frame with green foilage under strong sunlight, ensure your exposure timing is about right for a correctly exposed IR photo, then take the custom WB frame.
You should get photos with sepia-toned/bluish colours, without the custom WB you will get pinkish-magenta images, which are also fine, but in my view are quite alternative.
I used to use a H2, if everything stayed the same from H2/5 to H7/9, you might experience what is known as a hot spot in IR photography - due to lens diffraction - can google this. Basically it's not much of a problem, you just get some portions near the centre of your frame which seem to be overexposed. To resolve it, open up your aperture, should go away around f4.5 thereabouts if it is present at all.