What is a safety shutter? How to calculate the safety shutter speed?

My digital camera sometimes shoots at the telephoto end, and netizens say to shoot within a safe shutter speed. What is a safe shutter speed, a safe shutter speed refers to a relatively safe shutter speed when shooting handheld. At 13 o'clock, it is the shutter speed that is higher than the reciprocal focal length of the lens.

For example, when you shoot with a 20omm lens, the minimum safe shutter speed is 1 200 seconds, and when you shoot below this speed, the danger of false images will be great. Before there was no stabilization system, photographers would shoot according to this rule**. If you're using a digital camera, pay special attention to the eight-PS magnification.

For example, the focal length conversion magnification of Canon's non-full-frame SLR camera is 1

6. When shooting with a focal length of 2 mm, the safe shutter speed is 1 (20ox gate 6) = 20 seconds. That's why we try to shoot within a safe shutter speed**, but sometimes a safe shutter speed is not possible at a long focal length or in low-light conditions, so it's best to use a tripod or stabilization system to complete the shot.

1. The safety shutter is to ensure the shutter speed of handheld stable shooting. Above this shutter speed, the stability of handheld shooting can be guaranteed; Below this shutter speed, the shaking of the hand may cause a false shot.

2. The shutter speed is expressed in seconds or fractions of a second. Different camera manufacturers will have different shutter speed starting ranges, which is also important. All SLR cameras have at least the following shutter speeds (maybe more than 500, and 1 1000).

Second. Some cameras use abbreviated speeds, such as marking 1 30 seconds as "30". In order to distinguish between seconds and fractions of a second, these numbers are usually marked with different colors or their special markings on the body.

The safe shutter speed is the reciprocal of the focal length, i.e. the safe shutter speed = 1 focal length.

The safety shutter refers to the moment the camera "clicks" at 1 30s or 1 60s. If this time is longer than 1 60s, it is easy to make the picture blurry due to the shaking of the hand.

The shutter device works.

In general, the larger the time frame of the lead shutter, the better. The low second is suitable for shooting moving objects, and one camera emphasizes that the shutter speed can reach as fast as 1,16000 seconds, which can easily catch fast-moving targets.

As for DSLR cameras.

The usual b-shutter function, although you are free to decide** the time.

, the shooting flexibility is higher, but most of the current consumer digital cameras.

None of them are supported yet, and at most slower defaults such as 2 seconds, 8 seconds, 16 seconds, etc. are provided.

There is no absolute statement about this, but there is a "safe shutter" statement, in order to ensure that the ** shoot will not be empty, the shutter speed should generally be guaranteed.

In the 1 60s or more Wu Dousun.

But the safety shutter is not static, it is related to the focal length of the lens used to make the cavity chain.

Closely related. The safe shutter speed is the reciprocal of the focal length, i.e. the safe shutter speed = 1 focal length. For example, if a 50mm lens is used on an APS-C camera, then 1 80s is the safety shutter (the focal length conversion factor of a half-frame camera is so, so the actual equivalent focal length of a 50mm lens.

is 80mm). If you choose a shutter speed of 1 125 seconds or 1 250 seconds, you can ensure the stability of the shooting. On the other hand, if you choose a shutter speed of 1 30s, there is a possibility that there will be a "false shot".

At the same time, the shutter speed is also affected by the size of the aperture, the intensity of the light, and the sunlight.

, a wide aperture of 1 8000 seconds is a common occurrence. When shooting sports themes, more than 1,200 seconds can be regarded as a high-speed shutter.

The safety shutter is actually the reciprocal of the focal length, but for APS-C format cameras, the focal length is multiplied! Keep this in mind.

Handheld shooting around 1 60 is safer, 1 125 is suitable for shooting small moving objects, such as people walking, 1 250 is suitable for objects with moderate movement speed, such as runners, and 1 500 can capture cars! , probably remember that these weekday shots are enough, and if you are afraid of shooting paste, you will be on the shelf! It's okay if the shutter is slow.

The safety shutter and aperture don't matter.

Generally speaking, the shutter speed is twice the focal length, which is the safety shutter.

For example, when shooting at a focal length of 100 mm, the safe shutter speed is 1 200 seconds.

Look at the heroes who answered, some people say 1 2x focal length, some people say 1 focal length, all right, the meaning of the safety shutter is not to use the external stability of the situation, the handheld camera to ensure that the minimum shutter speed that does not affect the focus accuracy of hand shaking, or body shaking, or breathing vibration, for example, you take pictures with a focal length of 55mm, but use a shutter of 1 2 seconds, then the camera will shake, affecting the quality of the photo, if you use a 1 200-second shutter, you can rest assured to press the shutter boldly, Because the shutter speed is faster than the speed of shaking hands or breathing, then the quality of the photo will not be affected, and there is a critical point between fast and slow, and that point is called "safety shutter"! The general algorithm is not slower than 1 focal length, of course, not slower than 1 2x focal length is safer!

This little D speaks directly about his own experience, and does not excerpt anything very professional. The amount of the shutter, I personally think it has more to do with the light, (you won't be Parkinson's hand, right, normal people are enough, generally there is no problem with the shutter that lasts to 1 30) The size of the aperture has more to do with the subject you shoot For example, you need to shoot mountains... It's very wide above f8, and it's smaller to shoot small still lifes...

It is the shutter speed to ensure stable shooting in the handheld, and the safe shutter speed is the reciprocal of the focal length, that is, the safe shutter speed = 1 focal length.

The safety shutter generally refers to the reciprocal of the focal length of the lens.

For example, with a 50mm lens, the safety shutter is 1/50th of a second.

F6 is the aperture, if the aperture is F6, the ISO must be automatic, otherwise the shutter speed cannot be guaranteed when the light is low.

If you really want to, you can try k a 3 p c I've seen it here before, I hope it's still there;

Warmth doesn't need to buy a big mansion, just a hug every day, life should be relaxed, don't put too much pressure on yourself.

Is it because of the ignorance and ignorance of youth?

If no one takes care of you, it's cool and has no weakness.

A safe shutter speed is a shutter speed that is set to minimize hand shaking.

Generally speaking, if there is a moving subject in the picture, then the faster the shutter is better, but the high-speed shutter also brings the shortening of the ** time, and the brightness of the picture will be lowered, so it needs a well-lit environment or a large-aperture lens to support.

In the case that the light conditions are not ideal, or even in the case of relatively dark, in order to ensure the brightness of the picture, the shutter speed can not be increased, when the shutter is slow to a certain extent, the slight shaking of the hand will cause the picture to appear motion blur, in order to ensure handheld shooting, at this time, it is necessary to set a speed value that can ensure handheld shooting and pull the shutter as low as possible, which is the safety shutter value.

There is no so-called calculation formula for the safety shutter value, but through the accumulation of long-term experience, people have found that it has a certain relationship with the focal length of the lens, the longer the focal length, the easier the picture is to shake, and the safety shutter should be set higher; Conversely, the shorter the focal length, the less susceptible the image is to hand shake, and the safety shutter can be set lower.

Generally speaking, when using a full-frame camera, the safety shutter can be the same as the focal length value, for example, a 50mm focal length, the shutter speed is relatively safe to set to more than 1 50 seconds, and a 200mm focal length, the safety shutter should be set to more than 1 200 seconds. On the APS format camera, the safety shutter is twice larger than the full frame (this is because the APS format equivalent focal length is generally a multiple of the full frame), for example, the safety shutter should be set to more than 1 80 seconds for a 50mm focal length, and the safety shutter should be set to more than 1 300 seconds for a 200mm focal length.

Of course, some photographers who have practiced "iron hand skills" can ensure a certain production rate even when they are below the safety shutter, which requires long-term practice.

1. The safety shutter refers to the moment the camera "clicks" at the moment when the camera "clicks" usually in 1 30s or 1 60s. If this time is longer than 1 60s, it is easy to make the picture blurry due to the shaking of the hand.

2. When shooting, there is often a blurry film, which is often caused by the fact that the shutter speed during shooting does not reach the safe shutter, and the shaking of the hand will be directly reflected in the **, resulting in a false shot. To put it simply, the safety shutter is usually the slowest shutter that makes the film not blurred, and there is no numerical calculation in the strict sense of the word, when using a certain shutter, as long as the film is not blurred, the shutter speed can be called the safety shutter.