The model IMM 901 series metallurgical microscopes are used for identification and analysis of the structures of different metals and alloys. They are important instruments for the research of metallography. They can be used for quality research of foundry, smelt and heat treatment, for testing of raw and processed materials or for analysis of heat treatment materials. They are ideal instrument for scientific research, teaching, factories and so on. The model IMM 901 series can be taken euploid pictures for the atlas of metallography, with selecting special photography device.