Which is more important, optical zoom or resolution? 50

Even hypotheses should be based on actual conditions. The largest optical zoom at the moment is the Olympus SP570, which is a 20x optical zoom.

For now, the resolution is not much different, unless it is the kind that is only used for browsing (the resolution is 72), which is generally above 230. Whereas, resolution and pixels are two concepts. If it is really according to the conditions set by the question, the first one is more feasible.

First of all, 100W pixels are too low. Again, 30x optical zoom, I don't believe it can be any better. Normal lenses are in focus correctly whether they are 5 meters away or 50 meters away, so in terms of effect, unless the lens and focal length are specified, the results will be different; For the case of 500 meters, you can try shooting the moon and see if you can focus properly, how effective is it, that distance is more than 500 meters, right?

Another machine with 30x optical zoom of 1 million pixels.

There is no such machine, right?

Optical zoom is the distance of the illumination.

The resolution is the size, the clarity of the photo!

If only there really was:

There is a machine with 3x optical zoom of 10 million pixels.

Another machine with 30x optical zoom of 1 million pixels.

It is still recommended to buy the first one

I think that only when the resolution is improved, the optical zoom is meaningful!

Let's put it this way, in fact, these two completely depend on another value, that is, the photosensitive area, the photosensitive area of a small digital camera is generally 1, this value you can check the camera data parameters, it should be written. It's safe to say that 8 million pixels1 is definitely better than 10 million pixels1. Therefore, it is recommended that the landlord pay more attention to the photosensitive area, because it has a great impact on the quality of the first class.

As for the landlord's question, the large zoom doesn't make much sense for us to use, unless the landlord asks for a telephoto. If you don't pay a lot of attention to telephotography, it is recommended to choose a high-pixel camera. Only when the pixels are high, the richer the details, the more room for later cropping, and the benefits are many.

Correcting downstairs, the resolution you are talking about 72 and 230 is actually a dip, that is, the scanning accuracy, this value is used for printouts, and it has little impact on the image itself.

Of course, light change is important.

Resolution matters! Definitely.

There is no high resolution, and no matter how many times the zoom is used.

To put it simply. Buy 3x optical zoom with 10 million pixels.

Category: Electronic Digital.

Problem description: What is the function and how is it reflected in practical application?

Analysis: The English name of optical zoom is optical zoom, and digital cameras rely on the optical lens structure to achieve zoom. The optical zoom method of digital cameras is similar to that of traditional 35mm cameras, that is, the lens movement is used to zoom in and out of the scene to be photographed, and the larger the optical zoom factor, the farther the scene can be photographed.

Optical zoom is created by a change in the position of the lens, object, and focal point. When the image plane moves in the horizontal direction, as shown in the figure below, the vision and focal length will change, and the scenery will become clearer and clearer, making people feel like an object progressing.

Obviously, there must be two ways to change the angle of view, one is to change the focal length of the lens. In photographic parlance, this is optical zoom. The focal length of the lens is changed by changing the relative position of the lenses in the zoom lens.

The other is to change the size of the imaging surface, that is, the diagonal length of the imaging surfaceIn the current digital photography, this is called digital zoom. In fact, digital zoom does not change the focal length of the lens, but only changes the angle of view by changing the angle of the image facing the diagonal, thus creating an effect that is "equivalent to" the focal length of the lens.

Optical zoom is the use of the lens position in the lens to move and change the focal length, just like the principle of the telescope, is the real sense of zoom, digital zoom is according to the shooting needs, a part of the scene in the digital machine with electronic circuits to enlarge, not the real sense of zoom, after magnification will be increased early. Therefore, the optical zoom effect is good, but the device is large, and the digital zoom effect is poor, but the size is small and convenient.

Zoom Another important focus of a lens is the zoom capability, which includes both optical zoom and digital zoom. Although both can help magnify distant objects during telephoto shooting, only optical zoom can support the addition of more pixels after the image of the subject, so that the subject is not only larger, but also relatively clearer. In general, the higher the zoom factor, the more suitable it is for telephoto shooting.

Optical zoom, like conventional camera design, depends on the focal length of the lens, so the resolution and image quality do not change. Digital zoom can only reduce the original image size, making the image larger on the LCD screen, but it will not help to make the details clearer. Therefore, when buying a digital camera, we often recommend that you pay attention to the optical zoom magnification.

Currently, mid-range cameras generally have an optical zoom of about 3x, but there are also products with ultra-long zoom function, such as models with 10x optical zoom.

1.Optical zoom.

It relies on the optical lens structure to achieve zoom, and the zoom method is similar to that of a 35mm camera, that is, the camera lens movement is used to zoom in and out of the scene to be photographed, and the larger the optical zoom factor, the farther the scene can be photographed. Most of today's digital cameras have optical zoom ratios between 2x and 5x, and some code cameras have optical zoom effects of 10x. The optical zoom factor of the home camcorder is 10x 22x, and it can shoot things up to 70 meters away relatively clearly.

The use of a magnifier increases the optical zoom factor of the camcorder.

2.Digital zoom.

Digital zoom, which is actually an electronic enlargement of the image, uses a part of the pixels on the original CCD image sensor"Interpolation"The processing method is to magnify, and the pixels on the CCD image sensor are enlarged to the entire screen with an interpolation algorithm. With digital zoom, the captured scene is enlarged, but its clarity will be reduced to a certain extent, a bit like the zoom function in VCD or ***, so digital zoom does not have much practical significance. At present, the digital zoom of digital cameras is generally about 6 times, the digital zoom of video cameras is about 44 times -600 times, and 40 times is enough in actual use.

If the zoom factor is not enough, we can add a magnifier in front of the lens. If the angle of view is small, you can add a wide-angle lens accordingly.

3.Smart zoom.

The new and exclusive Sony Smart Zoom function. Zoom can be used to shoot without magnifying particles, so that the magnified image can maintain the original detailed quality. Smart zoom provides different degrees of enhanced zoom function according to the choice of different image sizes.

Unlike digital zoom, smart zoom keeps the image quality the same as the original image.

The light change is to bring the far shadow closer and has a low impact on the image quality, while the digital change is to zoom in the long view when the image quality is affected.

The larger the optical zoom factor, the better, and the digital zoom can be omitted.

Xx optical zoom, in layman's terms, refers to the ability of the lens to pull the distant scene in, the larger the multiplier, the closer it is equivalent to being able to pull the scene closer, you can try it, you can see things far away very clearly.

Among them, the effective one is optical zoom, which is to achieve the effect of magnifying the object by moving the lens in the lens, and the resulting image is a real image. Using optical zoom within a certain range does not result in a decrease in image quality.

Digital zoom is magnified by the calculation of the software**,**The larger the release, the worse the effect! Moreover, the deterioration in quality is very noticeable.

To put it simply, optical zoom is a combination of lens elements to achieve true lossless zoom with little to no impact on image quality. Digital zoom is the enlargement of the image through software, and the interpolation zoom is detrimental to the image quality. Therefore, except for special needs, digital zoom is generally not used.

Optical zoom is to adjust the distance of each lens to make the image magnification smaller, and the digital software to magnify the image. Digital zoom is related to the pixels of the selected target surface, that is to say, optical zoom can be infinitely magnified when the glass is selected, and the technology of digital and technological development is enough!

First, the purpose is different.

1. Lossless zoom is to scale the picture data through the image data processing system.

2. The pursuit of optical zoom is to use the limit state as much as possible to make a clear image.

Second, the scope is different.

1. Lossless zoom is an accessory software of digital zoom.

2. Optical zoom and digital zoom are concepts that are juxtaposed.

Lossless zoom is only a relative concept, it is not a real sense of zoom lossless, but through the image data processing system to scale the picture data, while optical zoom pursues as much as possible to use the limit state to make a clear image. In layman's terms, for taking pictures of distant objects, optical zoom pursues the larger the zoom multiple, the better, the clearer the image, and the more obvious the details, while lossless zoom is just a means of reprocessing the image obtained by digital zoom (image interpolation) without an optical zoom system (zoom objective lens group), which you can understand as the compression and release of the image, but the image is lossless when compressed and released.

The difference between the two cannot be directly compared, these are two technical directions, if you choose a device, of course, you must choose a good optical zoom device, optical zoom is better than digital zoom. Lossless zoom can be understood as an accessory software of digital zoom, which is used in conjunction with digital zoom and does not contribute to the imaging effect by itself.

Optical zoom.

Zoom is achieved by relying on an optical lens structure, which is similar to a traditional camera design, depending on the focal length of the lens, and is used to zoom in and out of the scene to be captured by moving the lens of the camera. The greater the optical zoom factor, the farther away the object can be captured. Optical zoom can support the image subject after imaging, the resolution and image quality will not change, and it is relatively clear.

Digital zoom. In fact, it is an electronic enlargement of the image, and a part of the pixels on the original CCD image sensor is enlarged using an "interpolation" algorithm. Through digital zoom, the captured scene is enlarged, but its clarity will be reduced to a certain extent, similar to the Zoom function in VCD or ***, which can only reduce the original image size to make the image larger on the LCD screen, but it will not make the details clearer