Optra Series is a brain child of Lexmark company. This company is an expert in producing printers that are a perfect fit for any place. Lexmark has produced a variety of printers and has a huge range of machines that do it all. Optra Series machines are compatible with multiple operating systems. These machines are capable of printing at a speed of 16 ppm and have a printing quality set at 600-1200 dpi. These printers can handle various sizes of papers and hence can print equally well on a A4 size sheet as well as an envelope.