Hi Copernicus,
I would just buy a good quality x2 barlow like one of andrews or Bintels ED ones. You will be able to use this for imaging as well later on (moon, planets) but make sure it has a T thread for this, some do some don`t.
http://www.andrewscom.com.au/site-section-10.htm (down the botom of page...).
I would not bother to try to image through your scope (prime focus...nebs and galaxies etc) cause you won`t be able to. Like What Eric says that you won`t be able to get your camera to focus even with a adaptor without major modifications, (changing the focuser moving the mirror and cell etc) Maybe later if you are keen enough to pull your scope apart and modify it.
These scopes are made for visual use and not designed for prime focus work. Get a good tripod head and make something up like Roger has mentioned and try some widefield imaging first just with camera lenses. You can use your scope to guide or track and maybe get a good telephoto lense to get a bit closer. You will be suprised in what you can do with a 350d and some good lenses.
Hope this info helps..
Very good advice Roger and Eric!!
cheers Gary..
