thank you very much for your reply and the screenshot. It seems that I am very inexperience with cameras in DAZ 3D (instead of the camera I used the perspective view ). Now it works. Thank you so much!
I use the newest octane render plugin for DAZ 3d. If I create a new camera I am not able to use the camera options "Focal length" and "F/Stop" because they are not existent. I saw youtube videos in which both options appear after using the "Edit selected camera parameters" (camera symbol ...