Concerning sizes for posting
I have found pano shots shouldn't exceed 999 and nrmal shots at 600X800 or 600x900
for Dslr's are as big as you shopuld go - I personally reckon 580 high is optimum
Geoff Chandler. UK/England/Surrey
NIKON D90 / D80. Nikon 16 - 85 VR, Tamron 28-200,
Sigma 70-300APO, Tokina 100 AT-X Pro D.
SB600 flash. Panasonic DMC-TZ25