Photography skills of several commonly used bathroom pendant products.

Multiple exposure, also known as multiple exposure, refers to multiple exposures of the same or different objects on the same film, so as to obtain an organic combination of multiple images on one screen. According to different shooting requirements, you can use ordinary flash, photographic incandescent lamp and high-power strobe flash.

There are basically two kinds of multiple exposures: continuous stroboscopic exposure and two or more exposures combining weak light with slow exposure under normal strong light. The environmental conditions required for multiple exposures are to have a black background with low reflectivity, and to ensure that there is enough space between the bathroom pendant product and the background.

Continuous stroboscopic exposure can be used to photograph moving and non-moving objects. For the advertisement of bathroom pendant products, it is mainly used to show the connection between continuous dynamics and before and after dynamics. When shooting, each action can be flashed once with a flash at a predetermined position. After several strobes, a regular image will be formed; For repeated stroboscopic exposure of non-moving objects, the main purpose is to change the image of the photographed object and have special modeling requirements, emphasizing the sense of form. In general shooting, it is best to move the camera without moving the subject, so there is no need for multiple light distribution.

The characteristics of multiple exposures combined with slow exposure and normal strong light exposure are that slow exposure can draw the motion trajectory of the object as a dotted line, while normal exposure can produce a clear image on the film. The picture is virtual and real, moving and static. The order of slow exposure and normal strong exposure depends on the convenience of shooting, and there is no fixed order. In slow exposure, the light source can only be illuminated by incandescent lamp, and the exposure is lower than the normal exposure, so that the brightness of the virtual image can be lower than that of the real image, and the primary and secondary images can be separated. You can use incandescent lamps or flash lamps to take real images.

General professional cameras and some middle and advanced cameras are equipped with multiple exposure control buttons, which can make the shutter roll up and release many times without moving the film, thus leaving multiple exposure images on the same photosensitive film. Multiple exposures in a SLR camera require the photographer to remember the location of each shot, otherwise there will be a combined image that is inconsistent with the original idea. This is the difficulty of multiple exposure of SLR cameras. When a large professional camera needs multiple exposures, the operation is relatively simple. It is very convenient for large professional cameras to make multiple exposures. The pre-shot multi-exposure diagram of bathroom pendant product design can be drawn directly on the viewfinder screen, and the position and shape can also be marked. When shooting, continuous exposure can be carried out according to the position of the mark accurately. Multiple exposures on a film need to be accurately analyzed according to the total exposure during shooting. If there are overlapping images in several exposures, the exposure of each shot should be reduced according to the brightness of the subject and the creative effect of the picture of the bathroom pendant product. If two exposures are made, each exposure only needs to be 1/2 of the normal photometric reading, and three exposures only need to be 1/3 of the normal photometric reading. If the exposure times exceed three times, it may reduce the contrast of the picture and affect the effect.