A computer controlled NIMA Langmuir trough (type 702BAM) equipped with a Wilhelmy plate can register surface pressure-area isotherms with a resolution better than 0.1 mN/m. Furthermore, the Langmuir monolayer surface is continuously imaged with 2 µm lateral resolution, during the compression isotherm, with a Brewster angle microscope type EP3-BAM from NFT-Nanofilm Technologie, GmbH (Göttingen, Germany). This microscope can also be used for imaging of the Langmuir-Blodgett (LB) films transferred onto solid substrates. EP3-BAM from nanofilm is composed of a laser with wavelength 532nm, polarizers, shutter, 10x objective with focus scanner, analyzer, and CCD camera. Precise control of the angle and work height is achieved with computer-controlled software. The whole setup is assembled inside a closed cabinet. The Nima Langmuir trough is used to study the morphology of monolayers at different surface pressures with different subphase composition with a lateral resolution of 500 nm.