I have a cannon Xsi which is almost the same camera.You probally have a setting Av(Aperture value) on the dial.Set it to that and try and snap some pics.You could also need more light.Do you have a light tent or homemade light box?
I do have that setting and I will try that tomorrow, these pics did not use any light box or tent at all, and just room lighting.
Custom reptile and amphibian enclosures! As well as other custom wood working.