How to adjust the zoom of SLR camera? There is a zoom lever on the shutter of the card machine. How to adjust the zoom of SLR? 〕

Several people upstairs basically said it, so I just made it up.

A significant difference between SLR cameras and card machines is the zoom mode. The card camera controls the lens driving motor of the fuselage through the zoom lever, thus realizing the mechanical control of the machine zoom; The zoom function of SLR camera is realized by the zoom ring on the lens, which means that the user has to screw it himself.

Of course, there are zoom lenses and fixed-focus lenses. As the name implies, the fixed-focus lens has no zoom, so there is no zoom ring. In contrast, the card machine also has a fixed focus, for example, Ricoh GRD series does not have a zoom lever.

The advantages of manual zoom ring SLR are as follows:

1. When the card machine pulls the zoom lever, the machine basically changes the zoom to one level, and the SLR user can fine-tune the focal length;

2. Anyone who has used the card machine has found that the zoom speed of the card machine is sometimes very slow. When there is a subject to be photographed, the zoom process of the card machine will annoy the user in a fleeting moment, while the SLR user can control the zoom speed by twisting the zoom ring, and the zoom can be pushed to the telephoto end with a whoosh, which is more convenient for shooting.

3, the SLR of the fuselage driving motor is saved, which is more energy-saving. This is one of the reasons why the endurance of SLR can be so much more than that of the captain of the card.