Hello Dan,
On that occasion i used my Nikon D50,which is a DLSR type camera,grainy photos suggest a high ISO value,i always set mine as low as possible 200 or 100 depending on what camera you have,to compensate for the low ISO value i keep the shutter open for longer,my EXIF data for most of the shots is:
F11,
exposure 15sec,
ISO 200,
0 step exposure bias,
metering mode: spot,
no flash