NV6029 Nodal Slide Assembly Setup is an elite training unit to determine the focal length of convergent lens either individually or in combination. The nodal slide is made available for the examination of images formed at a finite magnification, whether by visual examination, photography, by the introduction between the fixed light source or object and the lens.This setup helps students to understand the basic property of lens like focal length, focus point, nodal point, principal axis, centre of curvature etc. Nodal slide assembly is very compatible arrangement, in which rotational and linear movement of the carriage (on which two lens holder are fixed) is provided to check arrangement of optical bench.