To calibrate a camera, the choice of poses is very important and different angled poses can increase accuracy. Gathering those poses needs expert intuition in order to constrain all parameters accurately. There are various tools to help users calibrate the camera with its guidance. In this study, two successful calibration tools are tested. Both of them guide the user interactively to obtain the best poses. The first method tries to avoid singular poses and captures the poses that reduce the uncertainty of calibration. The second method uses a different approach. It uses the current calibration state to suggest the next pose. In the end, it verifies the parameters with the specified ones by the user. To test these two methods, ground truth data is needed. The ground truth data is obtained with the help of a 3D modeling program. The suggested poses are generated also with the modeling program and knowing the ground truth camera parameters given in the program, the results of the tools are compared.