It must be the time of year. A sudden urge to find the small stuff and get closer. So armed with a previously found bargain, 300 f4 IS and TC I setoff in search for bugs.
Although many proclaim the 300mm lens a "nearly" Macro I have to say that is complete BS. 1.5m at 420mm does not get you all that close. I tried it with an extension tube and yes you get a bit closer at the cost of light and Autofocus speed and accuracy. Best used with just the TC then. It is a pretty sharp combo but I will not be shooting ticks and ladybirds with it.