Regarding the P7100: The exposure time is during the day around the 8s, abens it can also be 40. You have to use otherwise it is too gloomy manual exposure. The white balance can be set to fit directly into the camera. The camera, however, produces so depending on the light, a mild to moderate hot spot in the middle.
This problem does not have the Sony DSC-V3. The is however equipped with the Night Shot function, in the built-in IR cut filter is folded. Good prerequisites for IR photography. This shows that the 950 filters (as intended) swallows a lot of light: at 1 / 30s and open aperture 2.8 is still rather easily underexposed in full sunshine despite full IR sensitivity the images. You can, however, edit well.
Normally I would give only 4 stars because of the lack of compensation, but because there are only a product does not do justice becoming 1-star review, there's me to balance. 5
PS: I have loaded sample pictures in the gallery