Is Nikon shift lens easy to use?

First, the concept of axis-shifting lens:

The shift lens is standing on the ground when shooting the building. In order to take a complete picture, the camera should be tilted slightly upward. Because the lower part of the building is close to the upper part and far from the upper part, the convergence effect of "the lower part is big and the upper part is small" will be adopted. The lens itself is not deformed, and the reason for this phenomenon is the perspective relationship. Correction: The camera is shooting a building. At this time, the lens angle may be insufficient, and it is necessary to change a lens with a wider angle. For a 35mm camera, the equivalent method is to shoot directly at the target with a lens with the same focal length but a larger viewing angle, and move the film to the reserved position when cutting (actually, the lens translates in the opposite direction). This kind of lens is the "axis-shifting lens", and the principle is as mentioned above.

Second, the purpose of axis shift lens:

The function of shift lens was originally used to correct the perspective problems caused by ordinary wide-angle lens, but it was later widely used to create photographic works that changed the focus position of depth of field. Axis shifting lens is mainly used for architectural photography and advertising photography.

The optical axis of the conventional lens is fixed and perpendicular to the image sensor plane (focal plane). Therefore, if you tilt the camera up or down, the subject will be deformed. This deformation is characterized by the inward convergence of vertical lines, which is most common when shooting buildings. The fundamental reason for this deformation is that the focal plane of the camera is not parallel to the plane of the object being photographed. Axis shifting lens, also known as perspective control lens, is designed to correct this problem. In the field of architectural photography, shifting axis lens is a necessity, and in other photography fields, shifting axis lens also has its uses.

The axis-shifting lens can move the optical axis in two ways: tilt and offset. Tilting can change the direction of the focal plane, making some areas in the picture clear, while other areas are out of focus. Offset is to move the lens in the direction parallel to the focal plane to correct the perspective and eliminate the convergence of parallel lines.