Precautions for video shooting 5D2 Precautions for video shooting

1: Tripod is extremely important. The camera frame itself is not used for moving shooting, so it is best to find a camera tripod, which can shoot shaking pictures smoothly and ensure the stability of telephoto pictures. I use a professional camera stand in Liback. The only small problem is that the camera tray is installed on the camera, and there will be ugly squeezing marks under the camera after long-term use.

2: lens selection. Generally speaking, the most commonly used are super wide angle and telephoto, and the focal length must be fixed with a large aperture. Because 5D2 is full, you can choose according to the movie title. The recommended configuration is as follows: 10mm (or 12 mm)-24 mm ultra-wide angle 24- 105 mm aperture is better, such as 2.8 24-70 Canon Red Circle 120-500(600)mm gun barrel 50 mm F65438+. The ultra-wide angle and telephoto I used are the deputy director of Sima. The actual shooting proves that shooting video is completely ok, but the price is much cheaper. If you don't want to spend money on lenses, this is enough.

3. Focus on the problem. At present, it is troublesome to use 5D2 to shoot dynamic pictures that need to follow the focus, and there is no suitable follow-up focus. The focusing damping of the camera lens is very astringent and feels bad. Of course, it is not a problem to use it occasionally. But that small LCD screen can only look at the focus. 5D2 has an HDMI interface. If the conditions are good enough, you can consider bringing a 720P display with HDMI, so that the live display will be more reliable. Of course, if you are a professional follow focus clerk, he can look at the scale. . . . But ... . Canon lens scales are all in the lens. It's inconvenient up there

4: battery problem. The original 5D2 battery can generally shoot two fast 4G cards intermittently, about 12 minutes (it is recommended to use a large-capacity memory card). Don't believe that you can shoot advertisements for two hours in a row, which is the theoretical maximum of direct shooting. Many times, it is still necessary to take photos, find the right focus and find the feeling of the picture. It is impossible to spend that long. Therefore, batteries are extremely important. At least three fast batteries should be prepared to ensure that there will be no problems. You can choose the battery of the vice factory, which is cheaper and has a smaller capacity. It takes about 1/4 less time than the original battery, but it should be enough.

5. If friends who often shoot city propaganda films or scenery films, they will definitely use freeze-frame shooting, such as sunrise and sunset night scenes. These shots are so cool with 5D2. On the one hand, the resolution is super cool, and there is huge room for later adjustment. On the other hand, the shutter time can be put very slowly, and the effect of night scene, especially traffic flow, is excellent. The slow door can greatly reduce the irritability of the picture, and the picture looks particularly clean and beautiful. It is especially recommended to buy a timer shutter handle, which can set the interval of automatic shooting.

6. Prepare enough color filters. (ND) UV is essential, and the lens must be well protected, and enough gray film should be taken, because the ISO 100 aperture will receive 8- 1 1 in the midday sun, and the video can't be shuttered too fast (it will cause insufficient motion blur, leading to a sense of jitter in playback), so the shallow depth of field effect you want is gone. It's better to prepare ND0.3 0.6 0.9 1.2. Commonly used may be 0.6 and 0.9.

7: viewfinder, wide angle of ultra-low and ultra-high aircraft. If there is no external viewfinder, it is fatal.

B: precautions when shooting

The liquid crystal of 1: 5D2 is lit, because don't be confused by the explosion of the picture. Looking at it later, there is no exposure transition at all. Take a photo when you are uncertain, and expose it with the photo. It can't be wrong. Afraid of exposure transition, as a result, the aperture is closed too tightly, resulting in some pictures being very gray and dark. After revision, 5D2 mov is not red one's RAW after all, and there is not much space. So try to shoot as accurately as possible in the early stage.

2,5D2 is not suitable for shooting large-scale moving pictures. The existence of jelly effect makes the types of films that 5D2 can shoot a little limited, and the most suitable ones are fixed and slow-motion scenes. If you need a lot of follow-up shots and move quickly, the linear objects in the picture will be tilted and deformed. Of course, if you do, it's okay to get used to it.

3. Because the circuit processing of moire fringe is not good, avoid shooting a large number of horizontal stripes. There will be color interference at the junction of black and white, which will greatly affect the picture quality. This is a common problem in wide-angle situations. Telefocus is unlikely because the background is more virtual.

4. If you have many dialogue storylines that need to be broadcast on TV, then use 5D2 with caution! ! ! ! ! ! ! 5D2 is 30FPS. If you want to make a movie (25PS) and broadcast it on domestic TV, you will inevitably encounter various conversion problems. There are two methods, one is to change 30FPS into 25PS by transplantation, and the overall length remains unchanged. The problem is that the picture is blurred, which is highly recommended. Another way is to treat the material 30FPS as 25FPS, because there are 5 more frames per second, so it feels a bit slow, which is also the reason why the audio is not synchronized. If you insist on synchronization, the voice will change tone. Therefore, friends who are looking forward to making movies with 5D2 need to use it carefully. At present, only bios supporting 24P or 25P can be used for work. At present, we can only shoot advertisements, special topics and scenery films that are not sensitive to counterpart synchronization.

5. Pay attention when shooting, the style should be set reliably and the saturation should be reduced. So it won't overflow on TV.

6. About stroboscopic: voltage (generator car); The shutter speed with tungsten lamp or kino is one fiftieth of a second.

Because the camera mode of 5D mark ii does not provide the function of manual aperture and shutter, the machine will automatically adjust (in the case of sufficient illumination, automatically reduce the aperture and then improve iso), wasting the large aperture of EF lens, and the noise that could have been avoided will also appear in the dark area. What's more, if the aperture changes during shooting, it will directly lead to the frame drop of the shot film! Some people say that using a full manual lens can certainly solve this problem. But it lacks the advantage of fast focusing. In order to make it convenient for everyone to play each lens, it is necessary to introduce a method to keep the EF lens with a large aperture through the "exposure lock" function ~ ~ ~ The specific principle and operation method are as follows:

Key points: The automatic exposure adjustment of 5D2 is to change the ISO first, then the shutter, and finally the aperture. Among them, the adjustment of ISO and shutter is about 1 second, almost synchronous (but ISO changes the fastest), and it is adjusted in about 2 seconds.

All the way to the aperture.

Using this changing time difference, we can quickly lock the exposure, lock the changing ISO, shutter and aperture value, and achieve the ideal or close to ideal exposure combination.

1. The trick is to cheat the camera's automatic metering system. You may need to bring your own light source, such as a flashlight, or you can use bright light sources on site, such as light bulbs. So as to control the amount of incident light in front of the lens.

2. It is suggested to set the dial to m (the reason will be described later). If you want to shoot a shallow depth-of-field film with large aperture and low ISO, first cover the lens with your hand and press the camera shutter button half-way. At this time, the camera exposure display ISO is automatically upgraded to 3200, using the slowest shutter and the maximum aperture of the lens. After that, remove your hand and let the light in with a field light source or your own flashlight. At this time, the ISO will decrease rapidly, and then the shutter will be adjusted within 1 sec. When the shutter is about to reach the ideal value (for example, 1/60), press the exposure lock button immediately, and at this time, it is too late to change the aperture, so you can lock the large aperture and the low ISO at the same time. In the dark indoor test last night, using EF 50/ 1.4, using the above method and practicing several times to grasp the time point, you can successfully set ISO 100, aperture 1.4, shutter 1/60 for shooting, or you can set other combinations, such as ISO/kloc.

3. Before locking exposure, remember to go to the short film setting menu and set the locking exposure time a little longer, such as one minute or longer (the default is 4 seconds), so as not to lock for 4 seconds after finally capturing the ideal ISO aperture shutter value and unlock it before shooting. The locking time can be set to more than one minute, so that there is enough time to finish focusing, composition and other work and shoot after exposure locking. If you don't capture the ideal exposure combination when you press the exposure lock, you can press the menu key to unlock the exposure lock and try again.

4. Using a similar method, by manipulating the difference between the light entering the camera and the camera's automatic adjustment of ISO, shutter and aperture time, with the increase or decrease of +-2EV on the camera, more diverse exposure combinations can be set. You can try to play and see how many combination changes you can set. You have tried a variety of exposure combinations the night before, but because you haven't played for long, you can't further test where the limit is. You need a camera in hand.

5. It is suggested to set the metering mode of the camera to central focus before shooting short films: 5D2' s instructions mentioned that central focus is used for metering when shooting short films (smiling face detection is not turned on). Therefore, the exposure combination of the shooting position can be evaluated by photometry using the central focus of the camera. You can choose two extremes of ISO value: 100 or 3200, which will be easily locked in short film mode. For the sake of image purity and daytime shooting, ISO 100 should be the most commonly used. After photometry determines the aperture shutter required for shooting the scene, enter the short film mode and lock the desired aperture shutter with the above method. It should be noted that you may not be able to successfully capture the required exposure combination, but you can capture a fairly close exposure combination or replace it with another exposure combination with the same EV. As long as it is not a serious overexposure or underexposure, some exposure differences can be allowed in the editing software.

Make adjustments.

Some ideas and suggestions (not necessarily correct, need more actual measurement and verification):

1. will shoot short films with 5D2, and most of them want the film effect of large aperture and shallow depth of field. Using the above skills, it is possible for EF lens to shoot short films with large aperture and low ISO. Because the camera automatically selects exposure value, it is easier to lock the high and low extreme values in ISO control, and it is difficult to lock the middle value if it changes too fast, so is the aperture value. It is found that the change of shutter is not only1/30 ~1125. I took the brightest incandescent bulb test at the scene last night, and the shutter can reach 1/5000 at the earliest. It is estimated that the shutter can be higher when shooting bright lights or the sun (I am not sure whether it is 1/8000).

2. When the camera dial is set to M, AV, TV and other modes, the slowest shutter is different. The slowest shutter of AV and TV can reach 1/5 seconds, that is, 0.2 seconds, while the slowest shutter in M mode can reach 0.8 seconds, that is, the range of shutter speed adjustment is the largest, which is why I suggested setting it to M pure manual mode.

3. Judging from many shooting proofs, the main problem of 5D2 is poor film compression and coding, so I guess the DSP effect set inside the fuselage should be as little as possible, and the burden of computational complexity should be reduced as much as possible to see if it can help improve the image quality. Therefore, I personally suggest that the picture style should be set to "neutral" in the parameter setting, and the contrast should be adjusted to the lowest -4. Even the saturation and sharpness can be reduced and then made by software. Personally, I suggest turning off the "highlight priority" function, because it is mentioned in the manual that turning on this function will adjust the ISO range of the camera to 200 ~ 6400. I have doubts about making the image quality thicker, so I suggest turning it off. Whether to turn on other functions, such as denoising, automatic image optimization, etc., will have an impact on the quality of short films, which needs more tests on the station to prove.

4. After exposure locking, 5D2 can't be adjusted at all. You can only set the addition and subtraction of EV before exposure locking, but you can't add or subtract EV after exposure locking. However, Canon's HDV consumer machine (such as HV20 used by the author) can still add and subtract EVs after exposure locking, so the exposure control of 5D2 is worse than its own HDV consumer machine, which shows Canon's determination not to let the products cross the border. Therefore, we can't expect the controllability of 5D2 in short film recording to replace our own HDV, which users must consider clearly before using the video recording function of 5D2.

Presumably, Canon has limited this function in the whole marketing strategy and for the protection of CMOS. After all, this directly affects the cost of its after-sales service. The above excerpt is only a guide to use and thinking direction. I hope everyone will work together to bring the practical function of this small machine to the extreme!