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2010-10-28 02:49:02

About digital camera’s 10 knowledge

1. Pictures are sometimes the wrong color, we often

find digital photos of the scene inside our eyes to

see the original color of the landscape has changed,

sometimes reddish, sometimes yellowish. This is how

the case? This does not adjust the white balance was

mainly due to good reasons. Function of white balance

adjustment and color photography in the traditional

when you add the role of color temperature conversion

filters are similar, the purpose is to achieve

accurate color reproduction, but the color

temperature does not need a digital camera plus lens

filters, instead of using circuit adjustment mode ,

by changing the electronic circuits of red, green and

blue color mixing ratio, the color of the light

elements in the amendment off the high side. Most

digital cameras have automatic white balance

adjustment, this function under normal conditions or

more accurate, but under some complex conditions,

difficult to ensure the shooting. In fact, we are

exposed to the light source is generally more

complicated. So we have to take the time to develop

the first observation of the surroundings, the camera

white balance adjustment put before good practice.

Some digital cameras have self-adjusting the white

balance adjustment mode, generally a rectangle with a

small box above, the following two small triangle

symbol. This mode of white balance adjustment is to

let you point the camera at the scene white objects,

and then half-press the shutter, this time, the

camera will automatically record the status of this

white light, according to this value, you can then

The shooting of color to the correct restore. I

suggest that you adjust the camera white balance

modes such conditions, use it, in most cases, it is

more precise.canon bp-308 battery

2. Pictures are a virtual might be mainly caused by

several factors. First, the digital camera shutter

lag time is longer, so the hand is not easy to

predict with confidence that this is taken out of the

image will be virtual, because that is the hand

shake. In general, the staff can jitter is negligible

and the focal length of the shutter into a reciprocal

relationship between the degree and faster than this

time. Therefore, the light is not very good, slow, we

would not be desirable to use Jiaojia moving or fixed

objects to a fixed camera. Secondly, the picture is

worthless and may have no choice because the focus of

a good reason. Very often, we only noticed the scene

to be shot inside the box on the viewfinder, while

ignoring sharpen the focus on the subject to shoot,

then the picture would be the case on the subject is

not true. Again, that is, the location of the main

movement occurred, due to slower digital camera

shutter, resulting from the completion of pressing

the shutter to take a relatively long time used, then

it is easy to place the main location of the mobile,

in this case pictures are also is vain. Solve the

above problem, one is used and with stationary

objects to a fixed camera, the other one is flat on

the camera can make the camera move together with the

shooting of objects, so that although the background

of the picture is fuzzy, but the main is clear.

Method often used for filming behind fast moving

objects such as cars and so on.

3. Take a good picture, there are many small point in

this case most of the night of the shooting. This is

due to the high sensitivity caused. The photo is what

we call noise. To know the sensitivity (ISO) the

higher the value, the picture quality will be more

rough, the lower the sensitivity value, the screen

will be more delicate. However, the sensitivity means

high sensitivity to light, so when shooting in low

light, we often choose high sensitivity, then, if the

camera’s own noise reduction system is not good, it

will cause the noise appears on the screen situation.

Want to avoid such a situation, we need to

artificially adjust the slightly lower sensitivity,

then a relatively long exposure time to compensate

for the light to enter, so pictures are there will be

level, and quality assurance the. Of course, the

premise is that you need to bring a tripod.

4. Pictures are too dark or too bright it is often

better because the exposure causes no control.

First, we should know and what exposure are related

to control and then correct it. It is mainly and the

following factors:

A. and the object itself between the ability of the

reflected light. The reflection of light of different

objects are different. Let’s imagine a black from

the coal store in the snow cat to a glass of milk

bottles, among them how the difference?

 B. Lighting. This and the relationship between the

intensity of light, and light intensity, the natural

need the exposure time is short; and vice versa.

 C. film speed. Low sensitivity to light sensitivity

that relatively weak, require relatively long

exposure time; sensitivity at the high sensitivity to

light, requiring relatively short exposure time. But

easy to bring high sensitivity is difficult to avoid

the noise, appear on the screen is a lot of coarse

particles. So how do we come all the objects exposed

to the right as much as possible to the

photosensitive material to restore go?

This requires us to grasp the knowledge of the

following:

a. the aperture: As already repeatedly stressed, the

greater the aperture, the greater the amount of

light; the smaller the aperture, the smaller the

amount of light.

 b. adjust the speed: the faster the shorter the time

into the light, into the light is smaller; and vice

versa

c. metering method: In general, we want to subject to

metering, the camera will be prompted to give your

required aperture and speed. According to this figure

to the exposure, the resulting picture should be a

gray color photos. So, whether black or white photos

are reduced to 18% of the ash, in photography, called

“middle gray.” But we usually encounter is rarely

black or white to take some objects, then this

exposure is no problem. If you encounter a black or

white objects, it is also easy to handle. Things like

making snow, you can first half in front of your hand

pressing the shutter, which is the metering of their

skin, and then take on the kind of snow you press the

shutter, Name the snow is white color. The reason is

that the camera was metering your hand, because of

our skin to close mid-level gray, so the ratio of

skin to naturally restore the white of the snow will

be gray become brighter than white. As another

example, a person’s clothes are black, we can also

use the same method, the first of their skin

metering, and then shoot. Our hypothetical, if the

make another snow when metering with the snow itself,

then what is the color photo to get started it? You

can try, is not necessarily snow, white reflective

objects can be strong. Now the camera’s side light

the way to have the central focus of the average

metering, spot metering. canon bp-2l5 battery

d. In addition, digital cameras generally offer + /-

2ev file, exposure compensation, exposure of a photo

when you feel you can not add and subtract when the

exposure compensation to be adjusted. Because the

objects in a different environment, making light, so

how to control the exposure is essential. Flash,

reflectors and other natural very useful, appropriate

use of the correct exposure compensation is another

effective way. EV value, said exposure value, which

reflects the aperture size and shutter speed

combination. EV value and the scene brightness and

film sensitivity is also relevant. In layman’s

terms, the faster the film speed, the brighter the

subject matter, the greater the EV value, the

corresponding time is necessary to use a small

aperture and fast exposure. Exposure compensation is

to allow the photographer to determine the camera’s

exposure metering of the “quantity” to amend,

adjust, and thus be suitable for the performance of

the main correct and accurate exposure. Volume with

exposure compensation +3, +2, +1, 0, -1, -2, -3, and

so on to that “+” indicates the exposure meter set

the exposure based on the increase, “-” indicates

less exposure, the corresponding figures for the

series of exposure compensation (EV). Becoming

increasingly popular digital cameras, digital cameras

beautiful appearance, strong features won the

consumers, but the digital camera, after all,

electronic products, so in practice, or complex than

traditional cameras, digital cameras, many of the

term is not very understanding, which to some extent,

the use of the impact of some, so we used a

collection of general digital camera will appear to

explain some of the words available to us, we can

make better Fun own “equipment . ” 1. What is e

lock? ae is the automatic exposure control device of

the abbreviation AE, ae ae lock is locked to a

particular set for automatic exposure control human

exposure to ensure that the main exposure of normal.

There are several locks to use ae to note: 1,

manually or automatically self-timer can not be used

when the exposure (ae) lock. 2, press the auto-

exposure (ae) after the lock not to adjust the

aperture size. 3 Do not use with flash photography

(ae) lock. 2. What is ccd? CCD not only to

“electronic coupling component” (charged coupled

device), it is like traditional film cameras as the

light-sensitive system is the light sensing circuit

device you can think of it as those many tiny sensor

particles, covered in Lens rear, when the light from

the lens and image through, projected onto the

surface ccd, ccd will have a current, the contents of

the sensor to convert the digital data storage. ccd

greater the number of pixels, the larger the size a

single pixel, the images collected will be more

clear. Thus, while the number of ccd image quality is

not the sole focus of the decision, we can still rank

it as the camera one of the important criterion. 3.

What is cmos? comple-mentary metal-oxicle-

semiconductor, Chinese translation, “complementary

metal oxide semiconductor” is a light sensing

circuit device it is now commonly used in Canon

digital cameras such sensitive devices. 4. What is

dpof? dpof refers to a digital print order

instruction is used in the storage media (video

memory card, etc.) to record information. In this

format, you can set your digital camera to print

those images, and how many to print.

5. What is the exif? The so-called exif

(exchangerable image file format for digital still

cameras), is the jeita (Electronics and Information

Technology Industries Association) to develop, the

decision to record a file jpeg image and sound way of

additional information on the specifications.

6. What is the exif 2.2? exif 2.2 version is a new

revised digital camera file format that contains the

best to print a variety of shooting information.

7. What is ptp? ptp English “Picture Transfer

Protocol (picture transfer protocol)” acronym. ptp

is the first by a Kodak company developed in

consultation with Microsoft, a standard, consistent

with this standard imaging equipment in the access

after the windows xp system can better be shared by

the system and applications, particularly in terms of

network transmission, the system can access to these

devices when used to create web albums upload

pictures, online chat, send pictures and so on. Of

course, this is mainly limited computer knowledge to

facilitate ordinary users, the camera, application

software, websites together more easily …. the

completion of some fool-functions.

 8. What is a tiff format? tiff is a more flexible

image format, which stands for tagged image file

format, file extension tif or tiff. The format

supports 256 colors, 24-bit color, 32-bit color, 48-

bit color and other color spaces, and support rgb,

cmyk and ycbcr other color mode, supports multiple

platforms. tiff file can not be compressed, file size

larger, it can be compressed to support the raw, rle,

lzw, jpeg, ccitt3 group and 4 other compression.

9. What is a wave? This is the recording standard

used windows file format, the file extension “wav”,

pcm format of the data itself or compression type.

10. Image storage format digital camera captured the

image file is large, storage capacity is limited, so

the image is usually compressed and then stored. The

most common image storage format is jpeg and tiff

files, jpeg highly compressed files to make changes

to the original 1 / 4, 1 / 8 or 1 / 16.

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