Which camera do you have?
I have a D70 & a D2h, and they both take different size brushes. I have the sensor brush from Visibledust.com, and have been very happy with it.
I just realized you've got the D50- I think it takes the same size brush as my D70.
Its really easy to do, they've got directions on their site, as well as there is a few threads on the site that deal with cleaning your sensor, just do a search for them. Visibledust is a Canadian company as well, so you won't have to pay the duties and all that good stuff![]()