Hi Dave,
You're right you will need some other things.
And here's a surprise you get to spend more money.
You'll need a Focal Reducer at least.
Here's a link to one at Bintel to give you an idea.
http://www.bintel.com.au/Astrophotog...oductview.aspx
Although you'll have to buy the correct size for your refractor.
This attaches directly to the focussing tube.
If you read the link it says you'll need a "wide" T ring adaptor because the thread to attach it to the reducer is wider...bummer..more money.
http://www.bintel.com.au/Astrophotog...oductview.aspx
From my very limited experience I think this is the minimum you'll need.
Good luck and good hunting.
Cheers,
Ken.