A film camera is a camera that captures images on a strip or sheet of light-sensitive plastic film instead of a digital sensor. When you press the shutter button, a mechanical curtain opens briefly to let light hit the film surface, where a chemical reaction records the image. That image stays invisible on the film until you process it in a series of chemical baths, producing a physical negative you can then scan or print. Film cameras were the standard for over a century before digital took over in the early 2000s, and they’ve seen a notable resurgence in recent years, with the film camera market projected to grow at roughly 15% annually through 2032.
How Film Captures an Image
A strip of photographic film is essentially a thin plastic base coated in a gelatin layer embedded with microscopic silver bromide crystals. When light hits these crystals, it triggers a chemical reaction: the light ionizes the bromide, freeing an electron that converts a nearby silver ion into a tiny speck of metallic silver. The more light a given area of film receives, the more silver gets reduced in that spot. This variation in silver density across the film surface is what creates contrast, and ultimately, an image.
Right after exposure, the image on the film is invisible to the naked eye. It’s called a “latent image,” a faint chemical pattern waiting to be amplified. The development process (more on that below) makes it visible and permanent.
What Happens When You Press the Shutter
Most film cameras use a focal-plane shutter, which sits just in front of the film. It consists of two curtains that travel in sequence across the film surface. The first curtain slides open to begin the exposure, and after the correct amount of time, the second curtain follows behind it to end the exposure. At faster shutter speeds, the second curtain starts closing before the first has fully opened, creating a narrow slit of light that sweeps across the film. This two-curtain design ensures even exposure from edge to edge. If a single curtain simply opened and reversed direction, one side of the frame would get slightly more light than the other.
The shutter speed, along with the lens aperture and the film’s sensitivity to light (its “speed,” rated as ISO), determines how much light reaches the film. Getting this balance right is the core skill of shooting film, since you can’t review the image on a screen afterward.
Main Types of Film Cameras
Film cameras come in several designs, but the two most common are SLRs and rangefinders.
A single-lens reflex camera (SLR) uses a mirror and prism system inside the body. When you look through the viewfinder, you’re seeing exactly what the lens sees, because the mirror reflects the image up to your eye. When you take a photo, the mirror flips out of the way and the shutter opens. SLRs offer through-the-lens accuracy, a huge selection of interchangeable lenses, and strong performance for portraits, action, and general-purpose shooting. Cameras like the Canon AE-1, Nikon FM2, and Pentax K1000 are iconic examples.
A rangefinder camera has a separate viewfinder window offset from the lens. You focus by aligning two overlapping images in the viewfinder until they merge. Rangefinders tend to be smaller, lighter, and quieter than SLRs because they don’t have a mirror slapping up and down. That makes them popular for street photography and travel. The Leica M series is the most famous rangefinder line, though more affordable options exist from Canonet and Yashica.
Beyond these two, there are also point-and-shoot film cameras with fixed or zoom lenses and fully automatic exposure, twin-lens reflex cameras (TLRs) with a separate viewing lens stacked above the taking lens, and large-format view cameras that use individual sheets of film.
Film Formats and Sizes
The most common film format is 35mm, also called 135 film. Each frame measures 24mm by 36mm, and a standard roll gives you 24 or 36 exposures. It’s compact, widely available, and fits the vast majority of consumer and professional film cameras made in the last 80 years.
Medium format film, known as 120 roll film, is physically larger and produces higher-resolution images with more detail and smoother tonal gradations. The exact frame size depends on the camera: common dimensions include 6×4.5cm, 6x6cm, 6x7cm, and 6x9cm. A roll of 120 typically yields 12 to 16 exposures. Medium format cameras range from boxy Hasselblad systems to folding cameras you can slip into a coat pocket.
Large format film comes in individual sheets, commonly 4×5 inches or 8×10 inches. Each sheet is loaded into a holder and exposed one frame at a time. This format delivers extraordinary detail and is still used by some landscape and fine art photographers, but the cameras are heavy, slow to operate, and expensive to shoot.
Mechanical vs. Electronic Film Cameras
Fully mechanical film cameras can operate without any battery at all. The shutter is spring-powered, you advance the film with a manual lever, and you set exposure by turning physical dials. Some models have a built-in light meter that needs a small battery, but the camera itself still fires without one. This makes mechanical cameras extremely reliable and repairable decades after they were manufactured. The Nikon FM2 and Pentax K1000 are popular examples.
Electronic film cameras rely on circuits to control shutter speed, aperture, autofocus, film advance, and rewind. They’re generally faster and more convenient, with features like program auto-exposure and motorized film loading. The tradeoff is that if the electronics fail, the camera is often unrepairable or not worth repairing. Fully electronic point-and-shoot cameras have the most potential failure points, since everything from lens extension to film rewinding is driven by circuitry. Some hybrid designs, like the Pentax LX, offer a few mechanical shutter speeds that work without batteries while keeping electronic automation for everything else.
Loading and Shooting a Roll
Using a film camera involves a physical routine that digital shooters never encounter. To load a roll of 35mm film, you open the camera back using a release lever or button, drop the film cartridge into the chamber on one side, then pull the film leader across to the take-up spool on the other side. The film’s sprocket holes need to align with the camera’s sprocket gears. Once the leader catches, you close the back (you’ll hear a click when it seals) and advance past a couple of blank frames to reach frame one.
After each shot, you advance the film one frame using a thumb lever or, on motorized cameras, automatically. When the roll is finished, you rewind the film back into its cartridge before opening the camera. On manual cameras, this means turning a small crank on top of the body until you feel the film release from the take-up spool. Some later cameras handle rewind with a motor at the push of a button. Either way, the film must be fully rewound before you open the back, or you’ll expose and ruin the images.
Developing the Film
Once you’ve shot a roll, the images are locked inside as a latent chemical pattern. To make them visible, the film goes through a series of chemical baths. For color negative film (the most common type), the standard process is called C-41. It involves a developer bath that amplifies the latent image into visible dye layers, a bleach-and-fix step (often combined into a single solution called “blix”) that removes the remaining silver and unused chemicals, a wash, and a final stabilizer that protects the images from fading.
Black-and-white film uses a simpler process that many people do at home with a light-tight developing tank and a few bottles of chemistry. Color development requires more precise temperature control, so most people send color film to a lab. After development, you’re left with a strip of negatives: the image is tonally reversed, with light areas appearing dark and dark areas appearing light. Scanning these negatives with a film scanner or photographing them with a digital camera converts them into positive digital files you can edit and share.
Why People Still Shoot Film
Film’s appeal in the 2020s is partly aesthetic and partly experiential. Film grain has a different texture than digital noise, and the color rendition of different film stocks (Kodak Portra’s warm skin tones, Fujifilm Velvia’s saturated landscapes) gives images a distinctive look that’s difficult to replicate with software filters. The limited number of exposures per roll forces you to slow down and think more carefully about each frame, which many photographers find creatively valuable.
There’s also a tactile satisfaction to the process: the mechanical click of the shutter, the tension of the advance lever, the anticipation of waiting for developed scans. You can’t chimp (check the screen after every shot), so you learn to trust your eye and your light-reading skills. For photographers who feel fatigued by the instant feedback loop of digital, film offers a welcome change of pace.