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We present a method for searching for polar candidates using mid-bandfilters. One of the spectral singularities of polars is the $HeII\lambda4686$\AA~ strong emission line. We selected the Edmund Optics filterswith central wavelengths of 470, 540, and 656 nm and a transmission bandwidthof 10 nm. These filters cover the regions of the $HeII \lambda4686$\AA~ line,continuum, and the $H_\alpha$ line respectively. We constructed a color diagrambased on the available spectra of polars and objects with a zero redshift fromthe SDSS archive. We show that most polars make a group with unique colorindices. In practice, the method is implemented in SAO RAS at the Zeiss-1000telescope with a new multi-mode photometer-polarimeter (MMPP). Approbation ofthe method with the known polars allowed us to develop two criteria to selectcandidates with an efficiency of up to 75\%.

Possibilities of Using Middle-Band Filters to Search for Polar Candidates