By Brian Shah
•
12 Aug, 2024
Intro You just finished taking a few pictures of your child, niece, or wildlife. You take a quick look on the back of your camera and think the image looks sharp. You download the photo to your computer but discover that your subject is fuzzy. What could have possibly gone wrong? Before you blame your camera, there are some settings and techniques to consider before sending your camera out for repair. Check Your Autofocus (AF) Mode Most modern cameras with autofocus have two general settings: AF-Single (or One Shot), and AF-Continuous (or AI Servo). AF-Single/One Shot is for use on still subjects or in situations where there is no motion. You pick one focus point, press your shutter-button halfway and wait for the camera to lock focus, and then push the shutter to capture the image. AF-C/Servo is used for subjects that are in motion. You typically use this setting to photograph sports, moving vehicles, or wildlife in action. In some cases, you can also use AF-C for portraits if the subject is moving. A third option, AF-A, or hybrid, is supposed to allow the camera to determine if the subject is moving or not. Cameras are getting smarter, but many experienced photographers claim that this mode is not very reliable. Check Your Shutter Speed Another issue could be that you are using a shutter speed that is slower than you need. Shooting at a low shutter speed may introduce shakiness, especially when hand-held. Traditionally, shooting at shutter speeds slower than 1/30 of a second could introduce camera shake. One additional general rule of thumb is to set your shutter speed to 1/x, where x is the same number as your lens’ focal length; that is, if you’re using a 200mm focal length, the guideline suggests setting your shutter speed to at least 1/200. If you need to shoot hand-held and lower the shutter speed, one traditional trick is to brace your camera and yourself. To brace the camera, hold it with two hands, tuck your elbows into your body, and lightly press the viewfinder to your eye. You can brace yourself by leaning into a wall or propping your arms on a horizontal surface. You will still need to consider your exposure when changing your shutter speed. A faster shutter speed means less light entering through the lens, so you may need to adjust your aperture and ISO. Check Image Stabilization/Vibration Control Using a camera or lens with image stabilization turned on will help reduce camera shake, especially at lower shutter speeds. Building on the shutter speed guidance from the “Check Your Shutter Speed” section, you can lower your shutter speed by at least one or two stops (that is, one or two clicks longer). Some photographers report being able to get sharp images when shooting handheld at 1/25 or 1/15 with image stabilization. One note about image stabilization and tripods: If you are shooting from a tripod on a calm day and using a remote trigger or your phone to snap the shutter, you want to turn image stabilization off. Why? Because the camera is trying to compensate for camera movement that isn’t there. The same is true if your lens has image stabilization (such as some higher-end telephoto DSLR lenses). However, when using a monopod, you’ll want image stabilization to remain on. Check Your Aperture Aperture is another setting that affects how much light passes through your camera lens. It also determines your depth of field, or how much of the image, from front to back, will remain acceptably sharp. If you’re shooting with your aperture wide open (f/2.8, f/2, f1.4, or wider) and trying to focus on your subject’s eyes, you may find that other parts of your subject’s face are not as sharp. This could be because your depth of field is too low; that is, the depth of field is very narrow. If your aperture is too small (f/16, f/22, f/32), you may find your images suffer from diffraction. In this case, the light passing through the sensor is interfering with itself. In this case, try to lower the aperture and adjust your other exposure settings (shutter speed and ISO) to accommodate the larger aperture. Check Eye Autofocus and Subject Type If you have a mirrorless camera with eye autofocus, and your subject has eyes (that is, a person or an animal), check to make sure it’s on. This helps your camera lock focus on one of the subject’s eyes. However, there might be times when you don’t want to focus on their eyes, in which case you can turn off this feature. Add Light In lower-light situations, you may need to increase your camera’s ISO to a higher number to capture an image. When doing so, your sensor boosts its signal, so you end up with an image that looks like it has a lot of “grainy” pixels (for film, we tend to use higher ISO-rated films). If you have the room to, you can lower shutter speed, open your aperture, and reduce your ISO to get a less-grainy image. If your camera is at its lowest settings for low-light images, consider adding light. A flash mounted on top of your camera and bounced at a white ceiling will provide a decent amount of light for a nearby subject. Using off-camera flash with a light modifier, such as an umbrella, softbox, or lantern, will produce softer, more even light, depending on the distance between the light source and the subject. Check for Atmospheric Interference With recent wildfires sending smoke into the atmosphere and then winds blowing them towards us, we’ve seen how hazy our landscape can become. Smoke and haze in the atmosphere can cause an image to appear fuzzy. Make Sure Your Lens is Clean There are three guarantees in life: death, taxes, and dust. We sometimes might find that dust gets on a lens, and when we find it, we don’t have a lens pen or rocket blower handy. You might try to blow the dust off, or you might reach for the end of your shirt. These, as well as other things in the air, might find their way onto your lens, causing your images to look a little distorted. It’s often a good idea to occasionally check your lens, and perhaps keep a protection filter on it to prevent it from getting scratched. I personally prefer the Repellamax II coating of the ProMaster HGX Prime filters found in our store, since moisture beads up on it. Conclusion Troubleshooting your blurry images can feel like a chore. But once you’ve learned some techniques, you’ll find yourself making these adjustments and nailing focus better in the future. If, however, you still find that your camera isn’t focusing correctly, bring it in for us to check out.