How does the LCD framing of the Nikon DSLR work?

The normal way of framing with the viewfinder is to press the shutter halfway to autofocus, then press the shutter mirror to raise the CCD or CMOS sensitivity, and then the mirror falls down once** to end.

When we are ready to shoot, press the shutter, then the mirror will fall and then rise up to autofocus (the live view state is temporarily turned off during this process, which is equivalent to our usual shooting state), and then continue to press the shutter to complete the shooting.

Often, when we press the shutter, we release the shutter when we hear the first sound, thinking that we have finished shooting.

In fact, at that time, it was just the sound of the mirror rising, and there was no autofocus (we needed to wait for a while to hear the focus prompt of Didi), and if we released the shutter, it was just that the mirror fell back into place, and it was not the end of the shooting.

In fact, the main difference in the whole process lies in the characteristics of Nikon's LV to achieve autofocus (that is, first framing through the monitor, the camera is temporarily turned off when shooting, the live view is restored to the normal shooting state to complete the autofocus, and the autofocus is completed after shooting), and there is no problem with the operation after getting acquainted with it.

It's that the shutter didn't go down. Press it first to preset, don't let go of the shutter at this time, and continue to press it.

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The most fundamental difference is the way of framing and focusing.

When using an optical viewfinder, the image is generated by direct observation of the light coming in from the lens with the naked eye, and the focus is performed using the phase contrast focusing method.

When framing with an LCD screen, the optical viewfinder is black, and the light enters from the lens and is directly illuminated on the CMOS for imaging, and then the processor analyzes the contrast of the frame with ants for contrast-type focusing.

Since the design purpose of the SLR camera is mainly to frame through the optical viewfinder, the contrast focusing performance of the SLR is very average, and the speed is slow, which is not conducive to capturing, and the optical viewfinder must be used when using the faster phase difference focusing, so it is difficult to frame the shooting at special angles such as high or low position.

But this phenomenon is not suitable for single-camera cameras. Sony's transflective SLR (Sony calls it a single battery) is viewed by LCD or EVF, but uses phase difference focusing; The Panasonic Olympus single electric (the same Sony is called a mirrorless one) uses pure contrast focusing, but the speed and accuracy are higher than the phase difference focusing of ordinary SLR.

There is no difference in framing, what you see is what you get, and they are all the scenery you see from that lens. Personally, I think the LCD framing is a bit unstable. It's better to stay closer to your eyes. ：）

There is no difference The borders may be a little different in size

Summary. Dear, if your Nikon camera doesn't have a built-in screen framing feature, you can consider the following methods to turn the viewfinder into a screen viewfinder:

Dear, if your Nikon camera doesn't have a built-in screen framing feature, you can consider the following methods to turn the viewfinder into a screen viewfinder:

First: External screen viewfinder: Buy an external screen finder that can be connected to the camera's vision interface or hot shoe.

This will provide a live image preview and framing feature. The second liquid wheel two: T-shaped adapter ring:

Some Nikon parallel machines are equipped with a T-ring function. By attaching the T-ring to the camera's viewfinder, you can attach an external screen to the adapter to achieve screen viewing. Third:

TV screen or monitor: Connect the camera to the TV screen or monitor via an HDMI cable, you can use the TV screen or monitor as a viewfinder and get a real-time image preview and framing effect.

Please note that the specific operation steps will vary depending on the camera model and the specific equipment. Before making any changes or connecting external devices, check your camera's manual to make sure you understand the correct steps and potential risks.

As the name suggests, the optical viewfinder is the work of framing through optical components. Live viewing, which can be framed by observing the LCD LCD monitor in the way of electronic viewing, is convenient for framing from different angles when shooting, making up for the limitations of traditional optical framing.

Optical viewfinder: Viewfinder can be divided into optical viewfinder and electronic viewfinder. As the name suggests, the optical viewfinder is the work of framing through optical components. According to the different working principles, it is divided into two types: rangefinder type and single-lens reflex coaxial type.

Among consumer digital cameras, the rangefinder is the most common, and this framing method is as simple as making a hole above the lens and attaching glass to the front and back, so that the photographer can see the person or object to be photographed through this hole. Although the rangefinder is not that simple, and there are functions such as zoom glass and focus assist line, the overall structure is very simple. Because of its simple structure, the cost is relatively low, so it is widely used in low-end digital cameras.

However, the rangefinder viewfinder also has its shortcomings, because it is not directly framed through the lens, so the image that the photographer sees from the viewfinder and the image on the final ** will have a certain degree of deviation, especially when shooting close objects, which is not conducive to the photographer's composition and framing of **. The single-lens reflex structure is much more complex, so the manufacturing cost is relatively high, and it is generally used in high-end products, which is commonly known as digital single-lens reflex (DSLR). The single-lens reflex viewfinder is directly framed through the lens, and the light enters from the lens, through a mirror, refracted to the upper focusing screen for imaging, and then refracted into the eyepiece, so that the photographer can see the image to be taken from the viewing frame, because it is directly framed through the lens, the problem of image deviation is solved, and the effect of "seeing is what you get" is truly achieved.

The advantage of the optical viewfinder over the electronic viewfinder is that the optical viewfinder is realistic, which is more suitable for sports viewfinder, and the electronic viewfinder will have a trailing phenomenon when it is in motion.

Real-time viewing: The consumption DC is that after the light passes through the lens, it is directly sensitized on the CCD, and the CCD transmits the signal to the LCD screen for framing. The principle of SLR is the same as that of previous films, usually CCD CMOS is not photosensitive, and it is only energized when the shutter is pressed, so it cannot be framed with LCD. SLRs that can be viewed with LCD are generally achieved by adding an extra photosensitive element.

The shooting process of SLR: there is a mirror in front of the image sensor (CCD, CMOS), which reflects the light entering the lens into the eyepiece, and the moment the shutter is pressed, the mirror flips, and the light enters the image sensor, which is recorded, and then it can be displayed on the LCD screen.

It's a different way of framing.

Optical framing is the lens to receive the image, through the reflector, Feene filter, Wuling lens (or penta-mirror) to the viewfinder eyepiece, the photographer can observe and frame through the eyepiece.

LCD real-time viewing, that is, after the lens receives the image, the image is directly transmitted to the imaging unit, and the digital image content can be directly seen through the LCD screen.

From the point of view of use, optical framing is to see the image directly, and there is no time difference. When shooting, the reflector and shutter move quickly, and the reaction speed is fast. Convenient shooting, more convenient for capturing and high-speed shooting.

1. Nikon's simple card machine uses the screen to frame after it is turned on.

2. Nikon cameras with monocular electronic viewfinder (such as Nikon Mirrorless V1) switch to screen framing after the eye leaves the monocular viewfinder. The screen display turns off when the eye is close to the monocular viewfinder (in order to save power).

3. Nikon SLR has LV switch or LV shortcut key after D90, and you can set it to LV state to view the screen.

1. The SLR of the LCD screen for framing is generally not the CMOS used for framing.

In live viewing, there is no autofocus function, and the main CMOS is used for framing, that is, the principle of framing is the same as that of DC. The advantage is that the framing is relatively bright, and the field of view is 100%, and it is not easy to see noise on the LCD screen in low light. The disadvantage is that autofocus is not possible in live view.

Some manufacturers take a different approach, reflecting the reflector onto a small CMOS for viewing.

SLR framing means that the light (image) coming in from the lens is reflected through the reflector, and then refracted through the pentaprism (or 5 mirrors) to enter the person's glasses through the viewfinder window, that is, the image you see through the reviewfinder window is the image that the lens sees directly. The advantage is that it is real and direct. The LCD screen framing, is the light (image) through the lens irradiated to the CCD (CMOS) image sensor, and then after the camera operation, displayed on the LCD screen, the advantage is that you do not need to be close to the framing window to see, the brightness is better, more direct, intuitive, can be convenient framing, the disadvantages are also obvious, that is, the picture seen from the screen, does not represent the final imaging effect, after processing, it will definitely be damaged, there is distortion.

And the optical framing is a storage lens, optical, very real.

2. The life of CMOS has a certain relationship with the power-on time and photoaging, and in theory, often shooting short films will affect the lifespan, but the CMOS used by some manufacturers on APS format cameras is exactly the same as the CMOS used in their DV products, indicating that the manufacturer must have corresponding measures for this kind of problem, in addition, the CMOS aging speed is very slow, and the SLR must be replaced in less than 10' years, and the life of CMOS has not yet ended. If you really want to use it for such a long time, you should be more worried about the mechanical parts of the camera, such as the shutter and capacitors, which can have a much shorter lifespan than the CMOS life.

Except for Sony, the sensor used when taking pictures, the reflector is of course turned up, so the optical viewfinder is black, and the camera has thermal protection, as long as it is not too hot, it will generally not have an impact, because ordinary DC works as long as the CCD is turned on, and it does not break quickly.