  Considering a strong field limit, we investigate the retrolensing phenomenon
in the vicinity of a Janis-Newman-Winicour (JNW) gravity embedded in a scalar
field. The light rays from a nearby source are considered to be reflected by
the photon sphere of the naked singularity acting as a retrolens to create a
pair of images. Paradoxically, the lensing coefficients $\bar{a}$ and $\bar{b}$
obtained are scalar dependent and discordant with [5]. Furthermore, the
influence of the scalar field on the apparent brightness and separation of the
dual image is discussed in detail with regard to the JNW light curves. Our
results are highlighted in correspondence with a non-scalar field gravity, in
particular the Schwarzschild gravity.
