What is the frequency response of a charge mode amplifier?
Your first circuit is an integrator.  It ideally puts the pole at zero, so there's no "corner frequency" as such...it's just 20dB/decade with (ideally) infinite gain at DC.

The second schematic adds Rf, which plays against Cf to give you a low-pass pole.  I think they switched the high-pass and low-pass formulae on the frequency response chart.