Photographers struggle to quickly calculate depth of field without memorizing complex optical formulas

Photography enthusiasts and professionals frequently need to calculate depth of field (DOF) to achieve desired focus ranges, but the mathematical formula is complex and not intuitive. They either waste time doing manual calculations on set, rely on imprecise guessing, or need to carry reference materials. Current solutions like DOF calculators exist but aren't integrated into their workflow or are difficult to access quickly in the field.