When buying a digital camera, in addition to effective pixels and optical zoom, what are the more im

First of all, let me tell you, if you like looks, buy Sony, and if you like performance, buy Canon.

The effective pixel is more than 800, and the optical zoom is not large.

The most important thing is that the lens Sony is the lens of Carl Zeiss foreign bar, but the quality and Canon ratio found out are insufficient.

Another very important thing is light sensitivity, which will be very clear when shooting things in the dark with high sensory intensity, otherwise it will be dark or a lot of noise.

Stabilization is also important, but don't think too much about the stabilization effect of the card machine.

Whether you want to stabilize or stand on the shelf, face recognition is also a very good new feature that helps you take pictures of people's faces.

Anti-shake! There is also the brand and price, hehe. The general card machine can buy more than 1000 on it, but there is no big advantage when it is expensive, but the style is better, or it is a **.

I think you have to pay attention to whether it's optical image stabilization, as well as battery life.

The size of the sensor, the sensitivity range, and the resolution of the screen.

Optical image stabilization, lens brand. ccd size. Whether the focal length has a wide angle or telephoto.

Also pay attention to the following:1 Whether the battery capacity is large enough. It should be able to shoot about 250 shots. 2 Optical image stabilization is essential. 3 The optical zoom should be 3--7 times. 4. The operator is comfortable to feel.

If it weren't for taking hundreds of shots every time**, I personally think that Sony's at the same price is better, but the battery life is slightly poor, and it is difficult to match the domestic substitute battery, Canon does not say that the battery life is strong, but it is easy to match the substitute battery. The rest is just a ** problem, pay attention to the choice of optical image stabilization.

I'm using Sony W390, 14.1 million pixels, G lens, large aperture, 24mm ultra wide angle, 5x optical zoom, with optical image stabilization, large screen. **1769 yuan with gifts. W350 parameters and W390 are about the same,**1479 with giveaways.

Both of these are cost-effective card machines. It is recommended that you go to Jingdong**Select,Free shipping,**Licensed,Invoicing,National warranty,I bought it online there, 10X telephoto Sony DSC-H55,Jingdong does not sell it,But Sony's official website has a sale**1789 yuan with gifts,It's also very good。

More than 3 million pixels are generally enough, 5 million is moderate, and more than 1000 occupy too much space.

Categories: Computer Network >> Software >>Multi**Software Problem Description:

When you search for digital cameras on the Internet, you can see a lot of indicators! Such as: pixels, image sensors, resolution, sensitivity, focal length range, shutter speed, aperture, **, what else telephoto, SLR, image stabilization, manual!

What exactly do these mean? What should I look for when choosing a camera?

Analysis: First of all, there must be anti-shake, the resolution of today's digital cameras is relatively high, and it is inevitable that it will shake, and the ** that comes out will be ugly and mushy. Secondly, the pixel is the most related to the quality, the higher the pixel is, the larger the file size, the better the quality, the image sensor is now generally CCD, there is nothing to compare, the so-called pixel refers to the pixel of the CCD element, the focal length range is the range you can zoom in, the popular point is the same as the telescope, you can zoom in on the distant image and shoot, of course, you can also zoom out, you can try it yourself when you buy.

The rest of the SLR telephoto is a bit professional, and I'm also an amateur camera player, so I can only give you so much information.

Look at the resolution, photo mode, focal length.

You can also go to zol to see the introduction of the camera, and the most important thing is that there are comments and experiences from netizens who have used the camera below.

The English name of optical zoom is optical

Zoom, digital cameras rely on an optical lens structure to achieve zoom. The optical zoom method of a digital camera is similar to that of a traditional 35mm camera, 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 captured.

The focal length range of a 10x optical zoom lens is generally.

36-360mm, also available in 28-280mm. In other words, the maximum focal length is 10 times the minimum focal length.

The resolution has nothing to do with optical zoom, it has to do with digital zoom. Digital zoom cuts out the image within the total pixels available, so the resolution is reduced. There is no linkage between the light change and the pixels.

Answer: The principle of optical zoom is to change the size of the image by changing the size of the focal length. Inside the optical zoom camera lens, there are lenses that can be moved. The image sensor behind the camera is fixed, and when the lens moves, the focus is moving.

As the focus shifts, the distance to the sensor behind changes and the focal length changes. When the focal length changes, the size of the image changes.

So it can be explained in unprofessional but relatively easy to understand words, that optical zoom only changes the distance at which the light travels, and the light itself does not change. It's like a person, there is no change after walking a thousand meters and walking two kilometers. (Although walking more can **, but here we will ignore the fat burned for the first kilometer for the time being!)

Light also attenuates as it travels farther distances, but camera lenses are generally short, so let's ignore this attenuation for now) Since the light does not change, the image presented after the focal length changes also does not change. Therefore, the biggest feature of optical zoom is that the pixels of the image will not change after magnification, that is, the picture will not be affected.

In fact, the most basic principle of digital zoom is to carry out a fixed ** method. If you still don't understand, then take out your phone, click on a **, and then zoom in and ....... This magnification process is called digital zoom.

What do you think? What technicians want to do with their heads, you can do it with your hands, is there a sense of accomplishment! When you put it very large, the whole screen may only be able to see a part of the original **.

This part will become more and more blurry as you zoom in. Because digital ** is composed of pixels, it can be seen as composed of small dots or small squares. There is a gap between these blocks.

In the original **, this spacing is too small for us to detect with the naked eye, so the whole picture looks relatively beautiful. However, as it gradually zooms in, the spacing between pixels and the pixels are also enlarged. This not only looks blurry, but also very stiff to the naked eye.

So digital zoom will damage the image quality.

In the process of practical application, the digital zoom process of the camera will have corresponding algorithms to make up for this shortcoming. Usually, at the same time as the digital zoom, the "gaps" between these pixels are filled by technical means. After all, the effect of filling it up through software is not as good as the real one.

The change of light and shade of color, the variety of color and luster, cannot be calculated. Therefore, after the digital zoom is magnified, although the software can make the ** less blunt, it will inevitably lose details.

You can refer to:

Fujifilm's cameras offer the best value for money.

1, Fuji (Fujifilm).

finepix

S4050 digital camera. 24mm Wide Angle+

30x optical zoom, etc. **1688

Canon's camera captures *****.

2, Canon

powershot

SX220HS digital camera. Approximately 12.1 million effective pixel CMOS, 28mm wide-angle, 14x zoom, IS optical image stabilization.

In simple terms.

Optical zoom is a physical zoom.

It's real. Digital, on the other hand, is a form of calculation.

SONYT300 large screen.

Full touch controls are a lot of fun.

The SONYT70 supports touch.

Graffiti feature. Good value for money.

canon80is

Good performance. **Suitable.

The appearance is rare and good.

nikons600

Value for money Panasonic FX36

The wide-angle end is good.

There are two types of zoom for card digital cameras: optical zoom and digital zoom.

Optical zoom is achieved by adjusting the lens of the compound lens, the higher the multiple, the higher the cost of the camera, the general card machine is 3x optical zoom, which can reach the multiple or 4 times, and the basic ** is above 2500 (the current market price).

Digital zoom doesn't make much sense, if you know how to use Photoshop, you can use the magnifying glass of the windows** reader on the computer "digital zoom", but if it's a machine bought for the elderly, it's better to keep this function.

The same **, of course, choose a machine with a high optical zoom factor.