It's nice but almost too drastic, I think... I was quite conviced by Eric's shots with the 100mm Canon. I picked two of them which I find espescially remarkable.
This guy uses a verrrry long lens set up.†
But I might guess the difficulties you encounter, when seeing his turtle shot and also this one:
But I think it's more a matter of the angle and strobe. Because this shot by Lars
with our Coolpix 990 turned out very well:
..but it's not as close as I would like to have it. You see