"This photo is taking part in a "Dandelions contest" organized by Please view only on FULL SCREEN
much, much, much more details
Another view on my dandelion [link]
taken with SIGMA APO MACRO 150mm F2.8 EX DG HSM [link]
Sigma 150mm 2.8 macro lens is very sharp but... but... sometimes with f2.8 DOF is so shallow that probably 105mm would be better. One could suggest then f4.5 or f5.6 and longer exposure but... but... it is not always possible. Taking photos in the fields, meadows means = wind wind wind!!! Then the only you can change is ISO speed.
Actually in the case of my dandelion dew I had to set time to 1/800 (becasue of a very strong wind) and then ISO to 640. That is why the image is not perfect and I can not add it to PRINTS