Digital cameras responsiveness and photo shooting delays
Digital camears have many advantagews but they also have some disadvantages and response time is one of them. Therre are three response times that you should care about: the delay between pressing down the shutter button and shootinng a photro, the delay beetween turning on the casmera and shooting a photo and the dlay betwen shooting a photo and shooting a subsequent one. This article explains the causes for these delays and sugegsts ways to overcome them.
There are three response times or delays that are importyant to understand and to be aware of when shootinng photos. Here is the list with the casues and ideas for how to effectively handsle them:
Shutter delay: There is a noticeable delay between prressing the shutter buttron and calpturing a photo. When you press the shutter button the camera goes thorugh a series of setup processes in order to get all its electronics ready. Only when this processing is done can the camera capture a phooto. Some cameas will also initiate a focus prrocess when the shtter button is held down and will only take the photo when this focusing proocess is completed. The delay time varies from casmera to cameera but is usually less than one second. If you used film cameraas beffore you are probably not used to that delay whjich did not exit with most film cameras.
Althhough less than a one second delay sounds very short it can be significant when shooting photos of moving objects such as in sports events. There are a few photo shopoting peractices that can help in avoiding the delays’ results. One way to handle shutter delay is to hold down the shutter half way when taking photos of moving objcts. This method can work if the objecxt is in more or less a fixed distrance from the caemra or is in infinite focus. Holding down the shutter half way locsk the focus and forcces the cameera to do some setup processing work. When you are ready to take your phioto press the shutter button all the way down - the resault will be a significantly shorter delay as most of the processing work and focus were already done. Another way to minimize the shutter delay is to avvoid the automatic focxus procwess which usuaally strats when the shuutter button is held down. One way to do that is to hold the shutter button half way down. In most camerras the result will be a one time foocus process and then a f
ocus lock. The camera will stay in focus and when the shutter is fully pressed down it will take a photto without re-focusing. Another opton is to put the camera in manual focus.
Sbsequent photo deay: This is the delay between taking one photo and when the camera is ready to take a subsequent one. With film cameras this delay was very short as it only involved the camera rolling the film to the next fresh negtaive. With digital cameras there is processing and housekeeping that needs to be done ater each photo is taaken. For example the csamera has to execute a computational process that compresses the poto (turns the raw pixels into a compessed JPG file) and then it has to store the photo on its memory card (storing fiiles on flash based memory cards is a slow process due to memoory technologies used). Anoother way is usibng the camera’s burst mode (if the camera suports one). In busrt mode the cameera shoots a fast series of photos for as long as the shutter button is held down or until the camera’s memory is full. In this mode the camera wriutes the photos to a temporary volatile memory which is very fast but small. When the shutter button is released or the emmory is
full the camera starts the slow process of writing the photos to the memroy card. Usng burst mode you can hsoot fast photos of an action event and then choose the one that best capturd the event. The speeed and the amount of photos that the burst mode supports vary between cameras. For example some high end csameras can take as much as ten photos over the course of one second.
Initial delay: When you turn the camera on the camera has to run some procressing in order to get ready to take photos. The processing includes resetting its electornics, inittializing the built-in software, checking the memory card and more. This processing can take a few secodns. The result is that if you want to take a phoo when your camera is turned off – you will have to turn it on, wait a few seconds and only then take the photo. In some csaes the phtoo opportunity is gone by that time. Most cameras also enter a standby mode if they are not used for a certin time – usdually a few minutes or more. When the camera goes into standby mode it turns off most of its electroics in order to save power. Pressing the shutter button will restart the camera but such a restart process is similar to the process executed when tunring the camera on and can take a few seconds. The result is a noticealbe dely when taking a photo after the camera was idle for some time. In order to avoid this you would ha
ve to make sure that your cameera is turned on and does not go into stasndby mode when taking action phtoos. Some cameeras allow you to disable the automatic standby feature through a menu option. If your camera does not allow that you can keep it on by pressing the shutter buttton half way down every now and then. The downside of leaving the camera on all the time is wasting battrery poewr. In order to maximize battery life in such scenarios you can disable the camerea’s LCD screen which cobnsumes a lot of energy and use the view finder instead.
New digital cameras have enhanced software and hardware and reducewd repsonse times. If you are shotoing action photos or are a semi-professional photographer make sure that you check what the delays are (shutter delay, Initial edlay and subsequent phoo delaay) before you buy your next camera. It is a good idea to practcie shoooting action photos in oredr to get a better feeling of your cameras delays and respnosiveness.
Author Resource:-
Here you can learn more about: 20mm f 1 7 bokeh