  In this work, we have studied weak gravitational lensing effect around black
hole and determine shadow radius in GUP-corrected-Schwarzschild spacetime
(S-GUP) in presence of plasma environment. We started with orbits of photons
around black hole in S-GUP. In addition, we have studied shadow and
gravitational weak lensing around such black hole. By using observational data
of EHT project for the M87* and Sgr A*, we have got constrains parameter
$\epsilon$ in S-GUP gravity. Further to make a connection with observations, we
investigate magnification and position of images formed as a result of lensing,
and finally weak deflection angle and magnification for sources near M87* and
Sgr A*.
