My images are in focus, but why do they look blurred through the viewfinder?

My images are in focus, but why do they look blurred through the viewfinder?

In a separate process to the actual focusing, the prism in the top of the camera will reflect the image into the viewfinder to assist you with composition. Because manufacturers know that users’ eyesight will vary, most modern DSLRs have a built-in dioptre that can be adjusted to improve the clarity of the viewfinder for the individual. This adjustment is usually done via a dial or slider at the side of the viewfinder. Try moving this until the LED info or grid lines displayed in the viewfinder are as sharp as possible to your eyes. If the adjustment is ineffective, the viewfinder optics may need attention from our technicians.