Film and Digital: The Real Differences
Arguments about film versus digital often miss the practical points: how each records light, what each costs you per frame and what happens after you press the shutter.
How film records light
Photographic film is a strip or sheet of transparent base coated with a gelatin emulsion containing tiny light-sensitive silver halide crystals. The size and character of the crystals shape the film's sensitivity, contrast and resolution. Each exposure is fixed in chemistry and has to be developed.
Sensitivity: ISO on both
Film speed measures a film's sensitivity to light. The current scale is the ISO system, introduced in the 1970s; before it, ASA was common in the United States and DIN in Europe. Digital cameras use a closely related ISO setting to describe how exposure translates into image brightness. On film you choose sensitivity when you load a roll; on digital you can change it frame by frame.
Raw files are the digital negative
A camera raw file contains unprocessed data from the sensor. It has to be converted into a viewable image, in the camera or on a computer, and the conversion is where white balance, exposure and colour can be adjusted with the most latitude. Many photographers call raw files their negatives for that reason.
What changes in practice
- Cost per frame. Every film exposure costs film and development; digital frames cost almost nothing once you own the camera. Film tends to make people slower and more deliberate.
- Feedback. Digital shows you the result at once; film makes you wait and learn to judge light.
- Archiving. Negatives need dry, cool storage; digital files need backups in more than one place.
Neither is the "real" photography. Choose the one that makes you look harder at the light.
Developed 2026-10-22