Hiya, i just got my new canon 100mm macro lense and a 25mm Extension tube. ive not yet got my ring flash thats coming in a couple of weeks. ive taken a few pics with it and would really appreciate some tips on increasing DOF as i appear to only have a very small area to work with. i understand the focus area isnt going to be massive but i was hoping it would be more than i have managed in the pictures below. 1. 2. 3. 4. 5. 6. thanks in advance for any help.