Originally posted by NeverSatisfied I see...thanks for the input; what is your opinion on using extension tubes on a lens that is already a dedicated macro, such as the D-FA 100? Or are extension tubes best relegated to use on non-macro, "normal" lenses such as the FA 50, etc.?
FWIW, I've used extension tubes on almost every lens I own. From a Sigma 135-400 to my 40mm Limited, to my 18-55 kit lens, and my 100mm Vivitar macro lens, as Douglas said to increase the magnification even further.
As was said - you'd need a lot of extension to make a difference on the 300mm lens.
I've posted this one before, but here's a shot with my 40mm with extension tubes attached:
"salt"
here is the 40 with all the extension tubes: