the right shutter speed
Find out why adjusting the shutter speed on longer lenses means sharper images
Your lens’s focal length directly affects your exposure triangle. By this, we mean you need to consider your shutter speed depending on your focal length to ensure camera-shake doesn’t equal blurry shots. This is more apparent if you have a longer lens, such as a super-telephoto 500mm prime lens, as the any movement of the camera (and therefore the lens) is more noticeable. In this case, you’ll have to speed up your shutter time unless you’re on a tripod or monopod.
The general rule if you’re using a full-frame camera (eg 6D or 5D series) is to match your shutter speed to your focal length to override camera shake – so at 500mm, set a speed of 1/500 sec or higher. If you’re using a crop-sensor camera (eg 800D or 80D) then multiply by 1.6 – 500mm becomes effectively 800mm, so your shutter speed needs to be 1/800 sec or higher.
Align your shutter speed with your lens’ focal length if you want sharp shots