Whats with all the nay sayers! .
It looks like you need the following.
This is a ring it attaches to your camera and will provide a thread to work with nose peice
http://www.myastroshop.com.au/produc...sp?id=MAS-054B
This is the nose peice, this is inserted in your 1.25" eyepeice hole. Have a good close look though my focuser has a thread for a ring already on it. I dont think yours does but just check anyway.
http://www.myastroshop.com.au/produc...sp?id=MAS-026H
You dont use a lense, you focuse the light straight onto the sensor using the scopes focuser.. the scope basicaly becomes a big lense.. a 1400mm lense ( a bit more actually cause of the small sensor and etc.. )
Your DSLR will be good for deep sky images and the moon.
Without a motor for tracking deep space wont be possible, well.... you need to be REALLLLLLLY good at manual guiding.. in reality though we never are.
The moon however requires a very short exposure time as its so bright, so its a good target.
For planets dont bother they are small. you need a barlow and a high power one at that, you start to treat planets at high power as deep sky, you will need tracking again.
For planets a webcam and adapter is much better idea, like this.
http://www.morgancomputers.co.uk/sho...SubCategoryID= and
http://www.morgancomputers.co.uk/sho...SubCategoryID=
You can then download software to upgrade the cameras firmware to a better model with more abilitys and win vista / 7 support.
Over time, start saving and upgrade to a decent goto scope allowing longer exposure of deep sky.. depending how extreme you go it could cost you $1000's