Restating some information about resolution. I tell my clients that they can specify the resolutioj of their photos. I shoot digital negatives that have dimensions and size. They don't have a resolution until I develop them as JPEG or .PNG or anything else the client may want. The composite below shows meta data of a finished JPEG, left, and the original digital negative, DNG, right. Note the absence of a resolution, or ppi(pixels per inch), in the DNG meta data.