2. In macro mode, due to the small depth of field, it is relatively difficult to focus accurately, so manual focusing is generally used. The background of photos taken in macro mode is generally blurred (defocusing around the focus).
3. In macro mode, the depth of field will become smaller, because the depth of field depends on several factors: the focal length and aperture of the lens, and the object distance (that is, the distance between the lens and the subject).
Friends with digital cameras often take pictures of small objects around them, and for people like us who deal with computer products all day, taking pictures of products is even more common. How to shoot these small objects well? How to show the details of our products? Today we're going to talk about macro shooting with digital cameras.
Firstly, define the concept of macro: How far is macro shooting? For most digital cameras, 50cm is usually the dividing line between macro mode and normal mode, so we count less than 50cm as macro. If it is more standardized, we should use the concept of magnification. If the height of the subject is X and the imaging height on the negative (or CCD or CMOS) is Y, then the magnification is equal to Y: X, and usually the smaller numerator or denominator is reduced to 1. For example,1:5,2:1and so on. The magnification that a digital camera can achieve is between 1: 1 to 1: 10, which belongs to the range of near macro photography.
To take a good macro photo, you need to pay attention to the following aspects:
1. Choose a digital camera with strong close-up ability. In the specification table of digital camera products, "the nearest shooting distance" is a very important indicator, and the manufacturer will give a number, such as 10cm, 6cm or even 2cm. So is it better to shoot as short as possible recently? Is 6cm better than 10cm? Not exactly. In addition to the number of the recent shooting distance itself, we also need to pay attention to which focal length range this recent shooting distance has reached. For example, a digital camera can achieve close-range shooting of 6cm at the wide-angle end, zoom to the telephoto end, and the recent shooting distance is more than 20cm; Digital camera B has a 7-fold optical zoom, and the nearest shooting distance is 13cm, but it achieves the longest focal length (that is, 7-fold zoom). In this way, the magnification of digital camera B is much larger than that of digital camera A. It can be seen that the recent shooting distance of digital camera changes with the change of camera focal length. After the focal length of most cameras is lengthened, the recent shooting distance is greatly increased. For example, Sony F707 can shoot 2cm at the wide-angle end, but after zooming to 5 times, it can only shoot objects 90cm away. However, there are a few exceptions, such as Minolta's Dimage7, and 7 times zoom can achieve the maximum magnification of the telephoto end.