What do you mean by long-term exposure?

Question 1: What does long exposure mean? That is to say, when shooting, use a slow shutter speed (ranging from a few seconds to several hours) and set the aperture and other values accordingly to achieve a very strange shooting effect.

I took this, and the shutter speed was 30s.

Not necessarily. It depends on the rated slowest shutter speed of the camera. I shot this for 30 seconds with D90, and then I have to use B if I want to slow down. I have to see for myself. The slowest paraxial ratio of Seagull 205 still in use is 1s, followed by B. If it is a fully automatic camera, it will be a bit troublesome because you can't set the shutter speed yourself, but if there is a long exposure shooting mode,

Question 2: What do you mean by long exposure? Long exposure is an exposure method with slow shutter (long exposure time). The advantage is that it can make the dark color clearer, and it can also take fantastic pictures, such as waterfalls and city roads at night.

The sensitivity of film is fixed. If it is a digital camera, you can adjust the sensitivity to make the image clear, but high sensitivity will increase noise.

Long exposure is often used when shooting night scenes. By choosing a slow shutter and a small aperture.

Question 3: What does it mean to expose the camera for a long time? If you shoot at night, the exposure time is longer.

That is to say, very slow shutter speed (ranging from a few seconds to several hours) is used to achieve a very strange shooting effect.

Generally, the SLR setting can reach 30S, and the B door takes more time.

The so-called B shutter, that is, B(Buble setting), also known as manual shutter, is generally engraved on the shutter adjusting button or ring, commonly known as B door. The ancient camera was controlled by an air pump, so it was called a light bulb. Modern cameras press the shutter, the shutter opens to start exposure, releases the shutter, and closes to stop exposure. In other words, the exposure time can be controlled freely.

Question 4: What does exposure mean? How does the exposure time affect the picture? How to control exposure? When the aperture is opened for a period of time, the light enters the aperture and is projected onto the photosensitive element for imaging.

Aperture index, shutter time and ISO all affect exposure.

If you have more exposure, the image in the photo will be bright, otherwise it will be dark.

Question 5: The problem of long exposure. Long exposure with B-door must be shot in dark environment. For example, due to long exposure at night, the aperture can be minimized, such as f22. If you are afraid of overexposure, you can add a grey mirror or use a polarizer instead, but it will affect the imaging quality. In order to avoid stray light, it is suggested to add a hood.

Question 6: Why do landscape photographers love long exposure photography? A moment is wonderful, but photography can also be a compression of time. It is a very interesting challenge to compress seconds, minutes and hours into one photo, which also fascinates photographers. Therefore, slow shutter is often used in landscape photography.

Look at the following example:

Question 7: What is the difference between high and low exposure resolutions? Long-term exposure will increase the level of dark details, because dark details can not be sensitized by CCD S or other photosensitive elements in a short time. If you use a higher ISO, you can expose the details in a short time, but the corresponding highlights may overflow. There may be a lot of noise. Large aperture, high ISO, the resolution of details will not be very good, but the film yield will be improved, while small aperture is low ISO, of course, more details. But a longer exposure time is required. It depends on which one you prefer.

Question 8: What do you need to prepare for a long exposure of photography, such as running water exposure? Tripod, cable release or remote control, reducing mirror ...

Question 9: What is the difference between superposition and long exposure? Superposition is to take multiple photos, and then superimpose them together to shoot the orbit of the star or eliminate noise; The long exposure is the way that the photosensitive element receives the light source for a long time to increase the exposure to shoot the night scene.

Question 10: Time delay shooting is the same as long exposure shooting.

Time-lapse shooting is to take a photo every once in a while, and then string these photos together to form a dynamic video with special effects.

Long exposure shooting means taking only one photo.