Currently, the conventional measuring methods in industry are more and more substituted with new methods, where the inspected component is firstly digitised by means of so called optical 3D scanners, and the inspection of dimension and shape precision is performed on the obtained virtual model. This approach bears many advantages and, in many cases, provides faster and more objective results. On the other hand, it has its restrictions – for example a problematic digitisation of detailed elements such as sharp edges or small and deep holes. Also, precision of this approach is often not possible to clearly quantify and we have to find satisfaction in various comparison tests. This article familiarises its readers with the results of research focused on analysis of precision when digitising shape elements by means of 3D scanners. Simultaneously, it provides knowledge about abilities of 3D scanners to capture detailed elements of the measured component and familiarises the readers with scanning limits for individual optical systems.