The general rule from the film days was 1 over the focal length as the shutter speed. thus a 28mm lens the lowest handheld would be 1/30 and for a 400mm 1/500. shake reduction schemes may offer a stop or two benefit.
The use of a tripod does not relate or depend upon the choice of aperture. It depends on a relationship between the shutter speed, the lens focal length and your ability to hold a camera properly and steadily. The general rule of thumb is, use a tripod if the shutter speed is slower than one divided by the lens focal length so as not to induce camera shake. For example, if the focal length is 250 mm, the slowest safe shutter speed would be 1/250.
The minimum speed, i.e., the slowest the shutter will cycle, is B. The shutter will stay open for as long as the shutter release button is depressed. You can't get much slower than 'not moving'.
This will depend on what you are shooting. If you are shooying water a slow shutter speed will do - if it's sports photography you will need a fast shutter speed. The shutter is a mechanical device that controls the length of time that light is allowed to act on the film. With a shutter speed of 1/125 you shoud avoid blur if the subject is not moving. Any speed under this your camera should be placed on a tripod. www.goldprints.com
To capture sharp and detailed photos using a fast shutter speed, adjust your camera settings to increase the shutter speed, use a tripod to minimize camera shake, and ensure proper focus on your subject. Additionally, consider using a higher ISO setting to compensate for the faster shutter speed in low light conditions.
By safe shutter, speed I assume you are wanting to know the slowest shutter speed that will not capture noticeable camera shake? There is no absolute answer to this. How much do your hands shake? The 'rule of thumb' I have used is 1/{focal length}. For a 400mm lens you would need a 1/400 sec or to use a tripod to avoid noticeable camera shake. For the 18mm you might get away with 1/20 or so. Although I despise using tripods, they will always give a sharper picture. You might need a microscope to tell, but you can tell.
To take slow shutter speed photos effectively, use a tripod to keep the camera steady, set a low ISO to reduce noise, and use a remote shutter release or timer to minimize camera shake. Experiment with different shutter speeds to achieve the desired effect, such as capturing motion blur or light trails.
I am not sure if you are asking about a digital camera or a old style camera. If you want a good older camera that would be a Cannon as you can set the shutter speed on it. If you are talking about a digital camera then you should hold the shutter button down longer.
To take a photo with a slow shutter speed, adjust your camera settings to a lower shutter speed, such as 1/30 or 1/15 of a second. This will allow more light to enter the camera, resulting in a longer exposure time and capturing motion blur in the photo. Use a tripod to prevent camera shake and ensure a clear image.
It depends on where you are seeing this number. Most shutter speed conventions do not use o1/12.5 of a second as a shutter speed; the closest would probably be 15 meaning 1/15th of a second, which is a very long/slow shutter speed usually producing blurs if you're not using a tripod. I can't think of a camera with that as a preset shutter speed but your camera might. You may possibly be looking at an intermediate f-stop (between 11 and 16) being reported on your screen or wherever these are shown (your LCD?) when you are in shutter priority mode where you are setting a fixed shutter speed and then the camera automatically adjusts for f stop (aperture) based on WB and ISO and is sophisticated enough to report an f-stop between 11 and 16).
The ball is moving at its slowest speed at the highest point of its trajectory when it momentarily comes to a stop before descending.
Shutter speed is how fast your shutter opens and closes to take a picture on your camera. Shutter speed also has a lot to do with exposure. The higher the shutter speed (1/2000 example) the less light.
You can adjust the shutter speed of Canon EOS cameras so there isn't a set shutter speed.