Film photography has a learning curve, and certain mistakes come up again and again for beginners. The good news: most of them are easy to understand once someone points them out, and easy to avoid once you know what to watch for.
Here are five mistakes that trip up most new film photographers — and how to get past them.
1. Misconfiguring the ISO Setting
This is probably the single most common mistake, and it's particularly insidious because the camera won't warn you when it happens.
Most film cameras — even fully automatic point-and-shoots — have an ISO setting that tells the camera (or you) how fast the film in the body is. On SLRs with a meter, the ISO dial calibrates the metering system. On automatic cameras, a DX-coding reader detects the metal pattern on the film canister and sets ISO automatically. On fully manual cameras, you set it yourself.
The mistake happens in a few common ways:
Loading ISO 400 film into a camera set to ISO 100: The meter thinks the film needs four times as much light as it actually does. Your images will be overexposed.
DX coding reader issues: If the DX contacts on your point-and-shoot are dirty or damaged, the camera may read the wrong ISO — sometimes defaulting to 100 regardless of what film you load. Test this by checking your camera against a known roll.
Forgetting to reset after push/pull: If you rated a roll at ISO 1600 for push processing and then loaded a new roll of ISO 400 film without resetting the dial, your new roll will be significantly underexposed.
The fix: Before every roll, confirm your ISO setting. Make it a ritual — load film, check ISO, close back. Write the film stock on a piece of tape stuck to the camera back if it helps.
2. Opening the Camera Back Mid-Roll
This one sounds obvious, but it happens — especially to beginners who are new to a camera and accidentally hit the release latch, or who haven't yet built the automatic awareness of whether a roll is loaded.
Unlike digital cards, exposed film is instantly ruined by light. Opening the back mid-roll exposes the film directly and destroys all frames in the vicinity of the opening. If you open it fully, you may destroy the entire roll.
The fix: Most cameras have a frame counter that shows "E" (empty), "S" (start/loaded), or a number. Check this before opening the back. If you've accidentally opened the back and the film was loaded, don't panic — immediately close it, then take a few blank frames (point at a blank wall and shoot) to advance past the re-exposed frames. You'll lose some images near the opening, but frames deeper in the roll may be salvageable.
Some photographers put a small sticker or piece of tape over the back latch as a physical reminder not to open it accidentally.
3. Underexposing Film (Especially Color Negative)
Film photographers often hear the advice "expose for the shadows" — and then promptly underexpose their images anyway. This happens for a few reasons: digital camera habits (where slight underexposure is often preferred to recover highlights), nervousness about wasting frames, or simply metering for the brightest part of a scene.
Color negative film — the most common type for beginners — is famously tolerant of overexposure. You can overexpose Kodak Portra 400 by two full stops and often get beautiful results. Underexpose it by two stops, and you get thin, muddy negatives with poor shadow detail and increased grain.
Black-and-white film is even more forgiving of overexposure and punished more by underexposure.
The fix: When in doubt, add light. Overexpose rather than underexpose for color negative and black-and-white. In practice: if you're shooting ISO 400 film, try rating it at ISO 200 or even ISO 320. You're telling the camera the film is slower than it is, which causes it to add more light. The results are often noticeably better than exposing at box speed.
This "overrating" advice does NOT apply to slide film, which handles overexposure poorly. Slide film is one area where accurate metering is important.
4. Not Accounting for Light Meter Behavior
Most built-in camera meters measure reflected light — the light bouncing off your subject. The meter averages the scene and tries to render everything as middle grey. This works well for average scenes but fails for:
Very bright subjects (snow, white sand, bright skies): The meter sees all that brightness and underexposes everything to bring it back to middle grey. Your white snow comes out grey and your subject is underexposed.
Very dark subjects or high-contrast scenes: The meter compensates upward, potentially overexposing bright areas.
Back-lit subjects: The meter sees the bright background and underexposes your subject, leaving them as a silhouette.
The fix: Learn to use exposure compensation (+1 or +2 for bright scenes; -1 for dark backgrounds with bright subjects) or switch to spot metering mode if your camera supports it. For backlighting, either meter off the subject directly by moving close, or use fill flash.
A separate handheld light meter ($50–100 for a basic incident meter) solves most of these problems by measuring the light falling on the subject rather than reflecting off it. Many film photographers consider a handheld meter one of the most valuable purchases they make.
5. Neglecting to Keep Records
You shoot a roll that comes back from the lab with beautiful results. The light is perfect, the tones are exactly right, and you think — I want to recreate this. But you can't remember which film you used, whether you pushed it, what camera you loaded it in, or where you shot it.
This isn't a shooting mistake, but it's a workflow mistake that compounds over time. Without records, you can't learn from your best results or troubleshoot your worst ones. Every roll becomes an isolated experiment with no connection to the next.
The fix: Log your rolls. At minimum, note the film stock, camera, date, and location for each roll you shoot. Note any push or pull processing, any unusual settings, any experiments. Review the results alongside your notes when the scans come back.
An app like Latent makes this easy to do from your phone right after you finish loading a roll. You can log the stock, camera, and shooting context in seconds, then link the scans when they come back from the lab. Over time, these records become one of your most valuable resources as a photographer — a personal database of what works, what doesn't, and why. The stock management workflow also lets you log expiration dates so you never accidentally reach for expired film when it matters.
The Bigger Picture
Film photography rewards attention and deliberateness. Most of these mistakes come down to the same underlying issue: not being present and intentional about what you're doing. The camera doesn't correct your settings automatically. The chemistry doesn't compensate for a poorly exposed frame. You are responsible for every decision, from ISO to shutter speed to whether the camera back is closed.
That's not a disadvantage — it's the whole appeal. Taking ownership of every frame is what makes film photography a practice rather than just a hobby.