Perhaps cloning off the white thing in the background would be better than having such a tight crop.
To address the sharpness of your pic, use a bigger F stop for Aperture, eg. F8 and a faster shutter speed, and with that also use a flash for your shots.
I'm not sure what is the S2 IS's performance for Super Macro mode, but generally at very close distance, the image quality of a camera may not be tip top.