Gravitational lensing by f(R,T) gravity

A solution for [Formula: see text] gravity of the type [Formula: see text] for specific [Formula: see text] functions is derived. It is shown that a slight modification to the Schwarzschild metric can be found for [Formula: see text], where [Formula: see text], [Formula: see text] and [Formula: see text] is some constant. The effects of [Formula: see text] gravity on gravitational lensing are calculated and the differences with general relativity are compared. Furthermore, it is shown that modified gravity can give a considerable contribution to gravitational lensing.