What is a SLR camera? (Taiwan Province province is called monocular camera? ) Is Nikon P7700 a SLR camera? Is a SLR camera a digital camera?

Nikon P7700 is not a SLR camera, but a card machine, and the lens cannot be replaced. According to the different packaging contents (such as SD cards with different capacities, etc.). ), merchant quotation: 3346 to 34 18.

Nikon P7700

ZOL comments: 5.0 Editor's recommendation

Advantages: excellent picture quality, smaller size, convenient flip screen and complete functions.

Disadvantages: the price is slightly more expensive.

User comments: 3.6 recommendation

superiority

1. Excellent picture quality and small size.

2. Flip the screen for easy framing.

3.6 Control dial, professional and fast. ...

disadvantaged

1. The wide-angle range needs to be improved.

2. High sensitivity and noise control need to be improved.

3. The lens cover is inconvenient to use

Nikon D3200 is Nikon's entry-level SLR camera, and the lens can be changed. According to the different packaging contents (such as different lenses and SD cards with different capacities, etc.). ), the market price is 2940-5050 yuan.

superiority

1 entry machine, excellent quality

2WiFi wireless and remote photography

3 high-resolution display screen

4 Full camera function

5 the picture quality is extremely delicate

disadvantaged

1 has higher requirements for lenses.

2 small-sized pictures without RAW format

3 High quality and average picture quality

SLR is the abbreviation of "single lens reflex camera" (SLR camera).

Principle of single lens reflex camera

Also known as SLR camera. It is a camera that uses a lens and reflects light through this lens. The so-called "single lens" means that the photographic exposure light path and the framing light path * * * use one lens, unlike the paraxial camera or the double-reflex camera, the framing light path has an independent lens. "Reflection" means that a plane mirror in the camera separates the two light paths: when the mirror falls during framing, it reflects the light of the lens to the pentaprism and then to the framing window; When shooting, lift the mirror quickly, and the light can shine on the photosensitive element CMOS.

DSLR is called digital SLR in English, so is digital SLR camera. Many people only know DC (digital camera), but they don't know-DSLR, an important branch of DC.

In normal times, there will always be people who resist DSLR. These people can be divided into three types: one is people who have never heard of DSLR; One kind is people who have heard of it but have not experienced it personally; One is someone who knows the benefits of DSLR, but thinks it is a "high-end product" that is too professional. This part of people will inevitably look at DSLR with a sour grape mentality, put out a lot of weaknesses of DSLR to convince themselves and others, and try to convince themselves and others that a small camera is better.

In the past, DSLR was indeed a symbol of "professionalism" and "luxury", with a small user base. However, in recent years, with the continuous price reduction of DSLR brands, the entry-level DSLR has already stepped down from the altar, becoming smaller and smaller, becoming more and more popular, and popularization is an inevitable trend.

This paper aims to help people recognize the true face of DSLR, change people's opposite understanding of DSLR's "non-race" in the past, and clarify consumers' worries and worries about this kind of camera.

Not all DSLR are high-end products.

2006 was the year when the DSLR war broke out in an all-round way. In this year, Sony, Samsung and Panasonic entered the DSLR market collectively, while traditional manufacturers such as Olympus, Nikon and Pentax also came up with their latest low-priced products to deal with it, which intensified product competition on the one hand and greatly enriched consumers' choices on the other hand, further reducing the price of entry-level DSLR to freezing point. Although there are tens of thousands of high-end DSLR products, at present, entry-level DSLR sets with lenses below 6000 yuan and single bodies below 5000 yuan abound, and this price is no longer a high-end product.

This price has almost reached the defense line of high-end consumer digital cameras. It can be said that the price difference between DSLR and high-end consumer cameras is not obvious, which will directly shake the choice of some consumers who originally planned to buy consumer cameras. Although DSLR is slightly larger than high-end consumer cameras, the control and imaging quality of DSLR have made a qualitative leap. In addition, different lenses can be replaced as needed, which constitutes the absolute temptation of DSLR. Consumers choose the most consumer-grade cameras, 2000 ~ 3000 yuan. Although its imaging quality is extraordinary, it is different from DSLR.

Five fatal temptations of DSLR

1. Excellent imaging quality is the first reason why many consumers favor DSLR.

Because the photoreceptor area of DSLR is much larger than that of consumer cameras, and the pixels per inch are relatively greatly reduced, the performance of DSLR far exceeds that of consumer cameras in terms of latitude, resolution and high sensitivity. The size of the photoreceptor is also the last factor that affects the sales of consumer cameras. Manufacturers often use other indicators such as high pixels to distract users. In fact, the size of the photoreceptor is far more important than the number of pixels. The maximum size of the photoreceptor of consumer cameras is only11.7 inches, while the photoreceptor area of SLR is mostly APS-C (23.7mm× 15.6mm) to full size (36mm×24mm), which is the same as that of 135 negative.

2. The shutter of 2.DSLR is a pure mechanical shutter or an electronically controlled mechanical shutter. The shutter has a very short time lag, and it can be imaged after pressing the shutter, which is a sharp weapon for capturing pictures.

The start-up speed of DSLR is only a few hundred milliseconds, and the continuous shooting speed is also very fast. Consumer cameras, on the other hand, are pure electronic shutters, which has a serious shutter lag problem. This weakness can be called the weakness of consumer cameras, so you can shoot still life, but it is not suitable for capturing moving objects-the image you get is often not the action when you press the shutter.

3. The SLR camera looks bright through the lens, and the picture you see is what you will shoot. Transparent light makes it easier to observe when focusing.

Consumer cameras take pictures through photoreceptors and LCD, so there will be some errors in the observation of brightness and color, which is not easy to detect, and it is even more difficult to see the picture clearly in the dark. Even if there is an optical viewfinder on a consumer camera, its optical path does not pass through the lens, so there is parallax.

The lens of 4.4. The DSLR can be changed according to the shooting theme. The lens of consumer cameras cannot be replaced, and the lens quality is much worse than that of DSLR.

5.DSLR has many manual functions.

DSLR can easily zoom manually and set shooting parameters manually. , and you can take some special shots (such as shooting fireworks with door B). But many consumer cameras are automatic (especially card machines). Most cameras have no manual zoom ring, so they can only zoom automatically by motor. Because the speed of zooming is slow, many shooting opportunities will be lost. Many people think that automation is better than manual operation, which is really a misunderstanding. Cameras with automatic function but no manual function are often low-end cameras, because the accuracy and speed of automation are far less than that of manual operation.

Do you really need DSLR?

If you just use a camera to shoot scenery, "come here for a tour" and record family entertainment, there is really no need to buy a SLR. Although DSLR is good, it is not suitable for everyone because of its price and weight. In addition, even if you have a DSLR, it doesn't mean that you can take good photos from now on. Because DSLR is more powerful, you need to learn more about photography to apply it well. If you use automatic transmission all the year round, the advantages of DSLR will be greatly reduced.

In addition, if you belong to the following situations, then you really need a DSLR.

1. If you have high requirements for image quality, please choose DSLR.

In contrast, consumer cameras will let you down. The simplest example is that the shallow depth of field effect (blurred background) of DSLR is beyond the reach of consumer cameras.

2. If you often take portraits, please choose DSLR.

Although the images taken by consumer cameras are very clear, we must correct the understanding that a good photo is clear and blurred in Jiao Wai, but not all of it.

3. If you have special requirements for snapshots and need faster response, please choose DSLR.

If you use a consumer camera to capture a moving scene, it will be difficult for you to capture the moment you want because of the lag of the shutter, and all you capture is the action you don't need. This result will directly lead you to lose confidence in "snapshot" photography and only shoot still things.

There is another point that friends who want to contact SLR should know.

Three nouns that DSLR novices are most concerned about.

1. Coke section

People often ask how many times the lens of a DSLR camera is. Please note that this is an extremely amateur question. When the digital camera was just born, because the focal length of the lens was pitifully small, in order to distinguish it from the focal length of the traditional 135 lens, we only talked about the zoom multiple and didn't talk about the actual focal length, which would make people forget that the focal length was small and the photosensitive area was small, which was actually a distraction. But DSLR uses the lens of 135 camera, which is usually based on the actual focal length, such as 17-85mm, which means that the zoom range of this lens is17 mm ~ 85 mm. If you insist on asking how many times the lens is, then this lens is 5 times zoom. The reason why this conversion is unscientific is that since the DSLR can replace the lens, if it is replaced with a lens of 70-200, the zoom factor is less than 3 times, but the base starts from 70mm, which is actually farther than the previous lens with 5 times zoom. Even for consumer cameras, the final result brought by optical zoom magnification is related to the starting base, and not all the fields of view with the same magnification are the same, so the magnification of consumer cameras is also a vague concept.

2. Original lens and sub-factory lens

Camera manufacturers such as Canon, Nikon and Pentax, which produce DSLR fuselage, are called original lenses in order to correspond to the lenses produced by their DSLR systems. And some professional lens manufacturers provide lenses with different camera interfaces, so that consumers have more choices, such as lenses with interfaces such as Canon, Nikon and Pentax produced by manufacturers such as sigma, tamron and tokina, commonly known as sub-factory lenses. Of course, it seems inappropriate to refer to these professional lens manufacturers as sub-factories, because many lenses produced by these professional lens manufacturers have the same quality as the original lenses, but the prices are much less than the original lenses, making them the first choice for many photographers who are not well off.

3. The focal length conversion rate

At present, the photoreceptor size of mainstream DSLR is much larger than that of consumer cameras, but it still can't meet the specifications of 135 film (unless it is a full-frame camera). Therefore, the imaging range of the lens with 135 camera will be different from that of 135 camera, and it is usually multiplied by 1.5 times (Nikon product) or 1.5 times. For example, Nikon DSLR is equipped with a 50mm lens, and its viewing angle is equivalent to the viewing angle when the focal length is 50 mm×1.5 = 75 mm. However, the optical characteristics of a certain focal length will not change because of the same viewing angle. Even the "equivalent to ××mm~××mm of 135 camera" declared by consumer cameras in the publicity only means that the viewing angle is equivalent, and the optical effect cannot be "equivalent".

superiority

It only has one lens, which is used for taking pictures and framing, so the parallax problem is basically solved. When taking a view, the light emitted by the object is focused by the lens, reflected by the oblique mirror to form an image, and then reflected by the "roof prism" raised at the top. Photographers can observe the scene through the viewfinder eyepiece, and it is the same image as the scene, so framing and focusing are very convenient. When shooting, the mirror will bounce up immediately, the lens aperture will automatically shrink to a predetermined value, and the shutter will open to make the film sensitive; After exposure, the shutter is closed and the aperture of the mirror and lens is reset at the same time.

Single-lens reflex cameras can be replaced by various wide-angle, medium-focus, telephoto or zoom lenses, and can also be equipped with close-up lenses, telescopic rings or telescopic leather cavities as needed. In short, any scene that can be seen clearly from the viewfinder can be photographed by the camera. A simple single-lens reflex camera using 120 film generally does not need a pentaprism (such as Great Wall DF-4) and can directly focus on the ground glass. Mid-to-high-end single-lens reflex cameras can also be replaced by overlooking viewfinders (such as Zhujiang S-20 1, Nikon F3), so they can also be used for low overhead or inverted viewing just like dual-lens reflex cameras. This is one of the reasons why the single-lens reflex camera gradually replaces the double-lens reflex camera.

The disadvantages of single-lens reflex camera are as follows: after adding mirror room and pentaprism, the body is thickened and the weight is increased; There will be mechanical vibration and noise when the mirror bounces; The time interval from pressing the shutter button to starting the shutter is also slightly longer than other cameras; It is difficult to focus with a small-caliber lens in a poor light environment because the viewing screen is dark, which may easily lead to focusing errors. Therefore, some foreign journalists picked up cameras with head-up framing and double-image overlapping focusing. They think this camera is small and light, with bright view, quick focus and easy to capture.

In short, digital cameras can be divided into four categories: card machine, home telephoto machine, single motor and SLR. At the same price, the shooting quality is almost the same, and there is little difference.

What kind of digital camera to buy depends on your own needs and uses.

For ordinary users who are not good at photography, they generally don't take pictures, but occasionally use them, such as taking some scenery, taking pictures, and taking pictures when traveling. It is recommended to buy a card machine, which is cheap and affordable, and more importantly, it is small, portable and easy to use.

I am a little interested in photography, but I don't particularly like photography. I hope to have some special telephoto effects. I can buy a home telephoto machine, such as taking pictures of distant scenery, birds and animals and the moon.

If you have a strong interest in photography and are eager to learn and improve photography technology, then you can have money to buy a SLR and no money to buy a motor. Other camera knowledge, you can Baidu, such as photography technology, shopping essentials and so on.

No matter what kind of camera you buy, it is recommended to buy a package containing an SD card with a capacity of more than 8GB. Note that the reading and writing speed of SD card should be higher than C6 as far as possible, and it is best to use a card with the standard of C 10. It is recommended that the SLR be equipped with two batteries.