How does the portrait of SLR Nikon d90 focus?

Shooting portraits in any posture and at any angle is basically aimed at focusing the eyes.

It is very important to focus your eyes accurately when shooting portraits. If the eyes are out of focus, the whole photo will be soft and lose focus.

No matter what pose the photographer poses, no matter what angle he shoots from, he should focus his eyes accurately. Especially when shooting with a large aperture, the depth of field becomes smaller, and a slight shift in the focus position will cause the eyes to defocus, so photographers should pay attention.

When shooting with D90, the out-of-focus phenomenon will be particularly obvious when zooming in due to the high resolution of the picture. In addition, the CMOS of digital SLR is relatively large and easy to blur.

Therefore, the requirements for focusing are very strict, and even pay attention to which part of the eye should be focused when the aperture is large.