When trying to recreate shots for practicing purposes lighting is surely one important part of the equation the other being the lens choice. while lighting schemes and aperture used might be approximated by eye reflections, shadow detail/placement and depth of field, i am wondering if there are any equally useful hints that allow for an educated guess as to which lens focal length was used. I am aware of the influence of crop factors induced by film format, sensor size and post-processing but these could be corrected for by apps like pCam, together with the info provided by the technical specs infos on sites like imdb.com or theasc.com. I nevertheless continue to run into difficulties when trying to recreate shots while using a digital aps-c sensor size or a 6x7 format film stills analog camera. Any useful guidelines would surely be appreciated!.