in response to Suraj's macros at jjmehta.com...server cudn't upload.

Sigma DG macro is a good lens...I too ordered for APO, BUT DUE TO NON-AVAILABILITY, THE RETAILAR SENT THIS LENS AND SHOT at 300mm at f8 and f5 with good results.....u took good macros...The thing u have to maintain is use of tripod with such a heavy lens in low light conditions...and check when shoot, the focal lenth should match with the shutter speed u are using. For example, for a focal length of 300mm, select a shutter speed of 1/500 or 1/300 to take shake free pix handheld...if it is at 70mm, 1/100 or 1/125 will work well. rest u know small aperture for more DOF and wide aperture for shallow DOF