In order to have a good stitch you must have a good number of balanced and level files to put together….. I recommend the exposure remains the same as well as the focus point. Start off by selecting a good balanced exposure and pick a good focus point and shoot using the lens happy place (on most lens between F8 and F11) . Manually focus and select the right exposure and shoot 10 to 30 verticals to stitch together. Use a good program to stitch the files.