For a close-up shot, the best depth of field is shallow. Set your camera to camera’s aperture number to between f/5.6 and f/11. The aperture number you choose will depend on what details of the eye you want to highlight in your photograph. Play around with the aperture to see how the aperture setting changes your shots. The eye is constantly moving, which can blur your shot. For a sharper image, set your shutter speed to at 1/100th of a second or faster. Using a tripod will also allow you to set a higher shutter speed. Increasing your ISO value allows you to take photographs in low-light conditions, but will make your photo grainy. If you’re taking your photo in a well-lit area, keep your ISO value as low as possible. Autofocus may not focus on the details you want to focus on, so it is best to just turn it off and focus the shot yourself. To manually focus your lens, turn your focus ring so that everything is out of focus. Then turn it back the other way until the details you want to highlight in your shot are in focus. Avoid using your camera’s flash or shining other bright lights at your subject’s eyes. Bright light can damage their eyes, and can cause your subject to squint, interfering with your photograph. It’s impossible to know what combination of viewpoint, composition, focus, and depth of field will produce the best shot. So try as many combinations as you can. When taking a close-up shot, the small changes you make can give you very different photos.
Make your camera’s aperture smaller for a shallower depth of field. Use a fast shutter speed to eliminate blurriness. Lower your ISO value to prevent digital grain. Focus your lens manually. Turn off your camera’s flash. Take lots of photos to capture the perfect shot.