  To explore capabilities of moderate-size optical telescopes in surveys, the
set of 9 new wide-field designs having apertures up to 1 m is considered. All
but one systems have angular field of view in a range 3.5-10 degrees and flat
focal surface; the field of the last system is 45 degrees in diameter at the
0.5 m aperture and spherical focal surface. The complete description of the
optical layouts is given in the Appendix. Relations between the expected
limiting magnitude, survey speed and exposure time allow to choose the system
that is most suitable for a particular task of observations. In principle, a
single wide-field telescope with the aperture of approximately 1 m can detect
objects brighter than 22.5 magnitude over the entire hemisphere within one
night, however, the reliability of acquired data can be significantly increased
by using a hierarchic observational network comprised of telescopes with
optimized parameters.
