  We study the optical properties of spacetime around a novel regular black
hole (BH) in general relativity (GR) coupled to nonlinear electrodynamics
(NED), which is asymptotically flat. First, we study the angular velocity and
Lyapunov exponent in unstable photon circular orbits in the novel spherically
symmetric BH spacetime. Later, the rotating regular BH solution is obtained
using the Newmann-Janis algorithm, and the event horizon properties of the BH
are determined. We analyze the effective potential for the circular motion of
photons in the spacetime of the novel rotating BH. Also, we analyze the photon
sphere around the novel BH and its shadow using celestial coordinates. We
obtain that an increase of the BH spin and charge as well as NED field
nonlinearity parameters causes an increase in the distortion parameter of the
BH shadow, while, the area of the shadow and its oblateness decrease. Moreover,
we also obtain the constraint values for the BH charge and the nonlinearity
parameters using Event Horizon Telescope data from shadow sizes of supermassive
BHs Sgr A* and M87*. Finally, the emission rate of BH evaporation through
Hawking radiation is also studied.
