How far can Cassini-Huygens record into space?

I don't understand your question. First of all, Huygens is long gone...it landed on Titan and ceased functioning over three years ago, on 2005 January 15. Cassini remains in orbit around Saturn and continues to make flybys of the various moons of Saturn, which is its mission. As far as I know, it is continuing to function normally, and will continue this mission for a number of years into the future. But it is basically limited to imaging objects in and around Saturn.