Christine,
You got quite impressive magnification on that one. Reversing the 50 will not get you so high unless you try either tubes or a tc or maybe both.
Having just seen crazee horse's post then I am in between moon shots ( 400 + tcs ) action shots of insects ( probably reversed 50 ) and ultra closeups ( bellows tubes and anything to give magnification of small creatures ).
WPF just keeps you so busy.
Don