Moon rising blur

[bradzo66]

I had the opportunity to shoot the rising moon last night ,it looked like a large orange ball coming over the horizon , it was spectacular but to my dismay the shots were awful , blurry and OOF , I tried every thing I could to get it clear but to no avail .The best shot I could get was a 2 sec exp at f/13 and 400 ISO . Can anybody point me in the right direction as I will have another opportunity tonight and would like to get it right , BTW camera was a canon 40d with150-500mm sigma and 2 x tele converter ? Any suggestions would be greatly appreciated . Thanks guys .

[slinkydog]

couldnt you lower you f/stop to around the 4 range and get a faster shutter speed?

[bradzo66]

I could if you think that would help dont really know too much only owned a camera for 2 months and am still learning