what gear do you have? im just a amateur but im thinking about going professional next year and start my own..i have a canon 50d and 5d mark 2. 70-200 f4L (going to upgrade to 2.8 is), canon 85 1.8 and a tamron 28-75 2.8 ( will upgrade to a canon 24-70). going to buy the sigma 35 1.4 it kicked canon and nikons 35/1.4 assesDo a (Ron) search on the subject. He has posted on it a few times. I think syncpulse has too.