In nearly all types of photography, controlling movement can be beneficial to telling your photographic story. Often times to tell your story most simply, you must avoid motion blur. One of the most common mistakes beginner photographers make is taking shots that are unintentionally blurry. Essentially, there are five main reasons why your photos may not be sharp . Below, we’ll focus on the ways to correct the most common causes.
Problem: Subject is Out of Focus – Some of the lenses on your camera are designed to only focus on the elements that are a specific distance away from your lens (like a telephoto lens). Often times in auto focus, your camera can focus on elements that are the wrong distance away from your lens, making the final photograph blurry.
Solution: The main way to fix this is to switch to manual focus. This may seem like a daunting endeavor for beginners, but it’s not as hard as it may appear. Simply alter the focus until your main subject seem s sharp. Generally, manual focus is controlled by a gear that twists on your lens, and is an option that offers a great deal of control.
If possible, check your handbook for more information as this option may only be available on DSLR models. If you’re unsure whether your subject is in focus, I recommend just changing the lens to an infinite distance focus (∞) so you can get as much of your scene in focus as possible. This has the same effect as when you try to increase depth of field, which is when you narrow your aperture as much as possible to maximize the range of focus.
Problem: Your Subject is Moving – If you’re looking for sharp images, it is important that everything in your scene is still – especially when taking long exposures. When your subject is moving, your camera will record their movement, giving your photograph a blurry appearance.
Solution: Simply try to have your subject stay as still as possible to fix the problem.
Problem: Your Camera is Shaking – It’s not advisable to shoot long exposures while hand-holding your camera because it is extremely difficult for anyone to stay perfectly still for an extended period of time.
Solution: To be sure that your camera doesn’t move out of position, use a tripod and shutter release cable/self-timer. Even then, always double check that the camera is stable on your tripod, as factors like wind can mess up your shot.
Problem: Your Exposure is Too Long – While many people prefer the atmosphere that long exposures can create, it’s often times unrealistic to think you can get perfectly sharp images with exposures that are very long.
Solution: By shortening the time your shutter is open, you can almost eliminate some of the aforementioned problems such as visible subject movement or camera movement that effects the final result. If you want to shorten your exposure while compensating for a lack of light, there are a few things you can do. You can increase your ISO that controls how “impactful“ a certain amount of light can be on the brightness of your final photograph. You can also use different lighting sources to brighten the scene such as a flash. In addition, you can widen the aperture or the space that allows light to pass to your sensor, but remember that aperture is written in fraction form, so f8 is wider then f22.
Problem: There’s too Much Image Noise – Unfortunately, even with modern cameras, image noise is still a common problem. Image noise is when your photographs seems pixelated and unclear due to a small photo sensor (this is the metallic looking piece that is exposed when your shutter opens. This is in fact, the way digital cameras record a scene) or high ISO’s (light sensitivity).
Solution: Because the source of noise is ISO and sensor size, you must either lower your ISO or buy a camera with a larger sensor (this is often the less feasible option).
In conclusion, avoiding motion blur can be an effective way to tell your photographic story. By understanding the cause of motion blur, you can be more ready to remedy the problem “in the field.”