What is the black screen of Canon SLR camera?

Compared with paraxial cameras, SLR cameras have the advantage that what you see is what you get, and the imaging angle in the viewfinder is the same as the final film. So, what about the black screen of Canon SLR camera? Let's take a look at the relevant content information.

What happened to the black screen of Canon SLR camera?

There are four situations:

The first type: the lens shutter is not opened;

The second type: the imaging chip (CCD) is broken.

The third type: it may rarely appear on Canon, that is, the DSP image processing chip is broken.

Fourth: Even if the objective lens is used, the screen is black.

What happened to the black screen of Canon SLR camera II:

There are several situations in which the camera may have a black screen and no image:

1, the DISP button was not pressed.

2. LCD cable is faulty

3, CCD photosensitive original fault

4. The aperture of the camera lens is not open.

5, circuit board image processing chip failure

What is the black screen of Canon SLR camera?

If you are already in shooting mode and press the "DISP" key on the back of the camera, but you still can't open the LCD screen, then:

1. Please check whether the battery is fully charged.

The battery power is insufficient (it may also be that the battery is aging and the power storage capacity is reduced), or there is oxidized dirt at the contact between the battery and the camera, which will make the camera unable to open the LCD screen.

Should:

A, ensure that the battery is fully charged, if the battery is aging, it should be replaced with a new battery;

The storage period of "disposable alkaline batteries" in shops is generally long, so there is no guarantee that the power is still sufficient.

Ni-MH rechargeable battery needs 14~ 16 hours to be fully charged.

B clean the oxidized dirt at the contact between the battery and the camera to ensure good contact.

2. If it is confirmed that there is nothing wrong with the battery. Then there is something wrong with the hardware of the camera.

This kind of fault is difficult to solve by yourself, so it is recommended to send it to customer service for testing.

Canon SLR camera skills

Sunshine 16 rule

Mouth formula: sunny sixteen yin eight; Cloudy for eleven days, dusk; Genting 5.6; Rain, snow and sunset.

Specific steps

Step 1: Set the shutter to the sensitivity. For example, ISO 50 sets the shutter to 1/60 and ISO 65438 sets the shutter to1125. In short, let the shutter speed be as close to the sensitivity as possible.

Step 2: Set the aperture to f 16 on sunny days, f 1 1 on cloudy days, f8 on cloudy days, and f5.6 on very cloudy days.

2, the sensitivity (ISO) numerical setting

Generally, the ISO setting should not exceed 400, and the picture quality is generally good.

100 is enough in good light. When shooting people in darkness or dusk, ISO is set to 200 and 300, but it cannot exceed 400, otherwise the picture will be rough.

Close-up and macro shooting skills

When shooting close-ups or macro shots, such as flowers, insects, birds, etc., when you are not good at using full manual file, you can adjust the camera to Av file.

The aperture is preferably f5.6 or below, and the focal length is preferably above 50. Try to shoot within 1m to blur the background.

If the light is good, the sensitivity is ISO100; In the case of weak light, ISO is preferably within 400.

Generally, side backlight is used for shooting.

Shoot insects, use TV files and appropriately increase shutter speed (1/250) and ISO value; Insects account for a large proportion in the picture, so the exposure can be reduced appropriately, and vice versa.

3, night photo shooting skills

Choose a suitable shooting time (the night scene does not have to be shot in complete darkness, and the best shooting time is the time between sunset and complete darkness)

Note: the shooting time of the night scene is very short, so it is necessary to choose the location in advance and construct the scene.

The shutter is set faster than the safety shutter to prevent the picture from blurring caused by hand jitter.

Appropriately increase the ISO value to increase the brightness of photos (ISO800 is the limit of 600D).

2. Shooting skills under TV (shutter priority)

Mainly used to shoot moving objects, such as sports events;

In the case of sufficient light, the shutter of high-speed subjects such as racing cars can use 1/500 or11000 seconds;

In the case of insufficient light, the shutter should be lowered, the camera should follow the subject, and the subject of the picture presented is static and the background is moving (virtual);

measure

Evaluation photometry is usually used when the light is relatively uniform, such as cloudy days.

In the case of complicated light, the central focus can be used to measure light.

Spot metering can also be used in the case of complex light, with stronger contrast between light and shade. Where the focus pair is exposed, it can be used for close-up but not for shooting large scenes.

This metering mode is mostly used when the photographer wants to fully express the subject.

Partial metering mode is very suitable for taking landscape photos with the subject in the center of the picture or with little contrast of ambient light.

Set the white balance WB according to the light environment.

Outdoor is usually set to automatic white balance, and the tone is enhanced in various modes: daylight-no need to enhance; Cloudy day-yellow; Tungsten lamp-blue; White fluorescent lamp-magenta; Glittering sunlight

4, outdoor photos, people, lens exposure and black face phenomenon.

Avoid light erosion: adjust the lens position and shoot with front light and side light.

Avoid the black face caused by backlight: flash fill light (forced flash)

Flash usage skills: Flash can directly fill the light (note: Flash can be used not only at night, but also on cloudy and sunny days); The flash reflects light (by adjusting the position of the flash, the light will shine on the face of the main character)

Setting of safe shutter speed

The focal length conversion coefficient of Canon 600D is 1.6, so the actual equivalent focal length is 80mm when installing a 50mm lens.

If the shutter of1125 seconds or 1/250 seconds is selected, the shooting stability is guaranteed. On the contrary, if the shutter of 1/30 seconds is selected, there may be "false shooting".

Photographic exposure and photometry skills

Common combination of aperture and shutter exposure on sunny days:100/16; 200/ 1 1; 400/8; 800/5.6;

White plus black subtraction rule (relative gray level)

Exposure compensation: white plus black minus

When shooting white (bright) objects, the high exposure is increased by+1 or+2; Shoot black (dark) objects to reduce exposure,-1 or-2;

Photometer without decomposition exposure: red brick; Bright sand and rocks; Bright leaves; People's skin (back of hand), that is, when metering, adjust the metering of hands.

1. Portrait shooting

Lens selection:

Large aperture, medium focal length and wide angle are not suitable (easy to deform, but suitable for girls with long legs), and long focal length is not suitable (compressed space has no three-dimensional sense, such as a flat nose).

Generally speaking, the focal length of 18- 135MM is appropriate, and the focal length of 85- 135MM is called portrait-only.

The ISO should be as low as possible to increase the delicate feeling of the picture, and slightly higher if the light is not enough.

Portrait composition: cutting the dividing line (head close-up, chest line, waist line, whole body), posture guidance, prop application (flower umbrella, small bag, folding fan)

Close-up of the head: commonly used open composition, that is, the forehead or chin is drawn (if the whole face is in the picture, the picture is not vivid).

Actual distance reservation: close shot (overhead 10- 15cm, below the bust line 5- 10cm), medium shot (overhead10-kloc-0/5cm, below the waist line 5-15cm).

Shooting angle selection

Frontal portrait: the picture is symmetrical and too rigid; It is best to tilt your face slightly so that the lines will be clearer (except those with higher cheekbones)

Seven-point portrait: it is best to tilt your face slightly so that the lines will be clearer (except for those with higher cheekbones).

Three-point portrait: the face has a large angle.

Profile portrait: highlighting nose lines or moving pictures.

Shooting height selection

Upward shot: big chin, rich face and tall figure (leading face)

Bow shot: oval face, big eyes, pointed chin (thin face)

Flat shot: the picture is objective but not vivid.

The subject's posture and gestures.

The three sides (face, collarbone and buttocks) should not be parallel, which leads to seriousness, rigidity and inactivity.

Your feet and arms should not be symmetrical (your legs should not stand at attention or straddle)

The clavicle surface should not be perpendicular to the camera optical axis, and the shoulders should not be at the same height.

Men turn in the direction of high shoulders (playing cool), and women turn in the direction of low shoulders (feminine).

A straight waist makes people look more energetic.

Treatment of environment and background: If the environment is messy and there is a large area of interference, try to open the aperture as much as possible to obtain a smaller depth of field.

Portrait photography lamp

Classification of light: natural light and artificial light; Strong light and soft light;

Front light (dull), back light (purely highlighting the outline), side light (yin and yang face, dividing line highlights personality,), front side light (large area bright area, small area dark area, bright picture), and reverse side light (small area bright area, large area dark area, low picture and prominent outline); Top light, middle light, low light, foot light

The choice of outdoor light is mainly to use sunlight, mostly using side light; You can also highlight the outline in a large area with side backlight and fill the dark area with reflector.

Outdoor people ran out.

Soft sunshine (cloudy, reflected light with clouds): most suitable for portrait shooting.

Sunny day (clear sky): it is forbidden to shoot with front light and front side light. People can't keep their eyes open when they look at the sun. Generally, they choose side backlight or backlight, and then fill the light with reflector or flash.

Light turbidity: Poor light treatment will lead to dull picture; There is no need to use a reflector, and the skin is delicate; Tips for exposure precautions (slightly increase exposure, although skin details are lost, people's skin is whiter), white balance (blue in cloudy light), and color application (cloudy colors are dim, make-up should be thicker, and clothes should be brighter).

Take a portrait of the landscape

Common focal length: 24-50MM is recommended, which can accommodate the scenery, but attention should be paid to highlighting the main body-people.

Don't put the subject in the middle of the picture, it's better to put it near the golden section.

The golden line of photography is the tic-tac-toe that appears on the camera. The intersection of the two lines is the golden line. These four lines are the dividing lines. Because putting people or things on these points is the best position of the whole picture, it is called golden section line or golden section line. )

In order to highlight the main body and make the characters whiter, you can appropriately increase 1/3EV or 2/3EV.

Portrait shooting in sugar water (very popular at present, with shallow scenery and blurred background): large aperture and long focal length.