Prospects of SETI by small size optical telescopes

In the present manuscript we consider the possibility of SETI by the small size (with diameters less than $1$ m) optical telescopes. Calculations are performed for parameters of a facility of Abastumani Astrophysical Observatory: AZT-14, Cassegrain Reflector with a parabolic mirror. In particular, we show that the techno-signatures of Type-2.x and Type-3.x civilizations might be detected. It is demonstrated that such it is possible to detect as hot megastructures (up to $4000$ K) built around main sequence stars and pulsars as well as von Neumann extraterrestrial probes.