When you need a photo with deep depth of field that is sharp across the entire frame, it might not be possible to do so in just one shot. Focus stacking is a technique that allows you to get sharper images with deeper depth of field. It is a relatively easy and straightforward technique, and this fantastic video tutorial will show you everything you need to know to use it for your own work.
Coming to you from Nick Page, this excellent video tutorial will show you how to focus stack an image using Photoshop. Focus stacking is a commonly used technique in genres that require deep depth of field with high levels of sharpness through the frame, such as macro and landscape work. The problem is that past a certain aperture, you will start to run into issues with diffraction and will actually start to lose sharpness, while using the hyperfocal distance isn't always a good solution, particularly when you have a close foreground element. This is where focus stacking, or combining multiple images of the same scene taken at different focus distances, comes into play. It's a tremendously useful technique and isn't particularly time-consuming. Check out the video above for the full rundown from Page.