With 7D & 24-105 f4 .... what sort of additional gear should I get in order to capture macro in a reef tank?
Extension Tube or Close-up filter? What is better for the occasion? 
Macro to be achieved is something like this:
or something like this:
I don't intend to spend fortune by buying additional Macro lens but understand that the final result may not be as sharp as the above.
Thinking of getting this extension tube below:
http://www.ebay.com.au …ories&hash=item3cd3eb6000
or close-up filter (diopter) below:
http://www.ebay.com.au …_trksid=p3984.m1423.l2649
