Long exposure photography often committed 10 errors

Long exposure photography often committed 10 errors

Photographer Francesco Gola 1981 was born in Italy, and its job is to engineer. Coast long exposure shot rigorous works its composition, photo canvas online majestic atmosphere, has a high popularity in 500PX.

In 2015 I (refer to Francesco Gola, the same below) All seminar opened in Italy, I will do a little investigation. I let all who attend at the end of the seminar. The most common offenses committed before their own class photography three erroneous write a piece of paper to me. So, I resolved to collect all the material up, canvas prints pick out the 10 most frequently committed errors in long exposure photography will be described.

Error one: anti-shake system is set to open state
There are some very lovely technology can help us get sharper images and reduce the vibrations caused by the body blurred, this technology when we slow low-light photography is very helpful. Although different brands of this function call are different, but their role was largely the same (like Nikon and Canon cameras they use the lens image stabilization technology. Sony, Olympus and Pentax are using anti-body shake technology). Nonetheless, in the end, this damping technology while keeping quality constant, then fourth gear to reduce the shutter speed to shoot.
Image stabilization technology uses sensors to detect jitter, and be compensated by moving the lens module or the sensor itself. The problem is the case that if the camera is in a relatively stable tripod (Of course, if you are doing a long exposure, your camera must be on a tripod), then the possibility of the occurrence of the vibration is very small. Perhaps you know this, but you do not know the camera, so even if there is no movement, the anti-shake system will try to compensate for camera shake by moving the lens or the sensor, and this situation actually triggered jitter ( or fuzzy) rather than eliminate them. So, if you sit safely stay in the camera on a tripod, let us turn off the image stabilization features it!

Error two: Mirror lockup forget to use
SLR camera, the light through the lens, reflector and then reflected into the viewfinder. When you press the shutter the moment, the mirror will be laid away in order to let light directly onto the sensor. This movement causes tiny body vibration, resulting in blurred pictures.
To avoid this vibration, you can activate the mirror lockup function. After activation, the first time you push the shutter, the mirror will be raised, and when you press the shutter again before shooting. Do underestimate this only a few seconds each, it allows the body to avoid shocking! Of course, if you are using a free reverse camera, this advice when I was nonsense it!

Error three: because the cash-strapped without the use of a graduated filter
In some cases (not a big place than light), only a gray density mirror can make you get the desired results. However, in many cases, the light exposure conditions compel us to maintain a balance in the use of gray gradient mirror. If you are using a screw ND filter, you might think that the only way to utilize GND filter is post-PS, but you’re wrong!
You can grab the hand and placed in front of the camera filters. For an exposure time of up to a few seconds of shutter speed, your only problem is properly adjusted in the hands of the filter. For up to several minutes of photography, even if your hands do not be too solid as a rock, the final result will be satisfactory (if you do not believe it personally try). Of course, the filter frame is still needed, especially in the need to go to multiple filters of the environment (or the time when you hand cramps).

Error Four: In order to extend the exposure time to the aperture setting to f / 22
The rule is easy: If you decrease the aperture, you will get a longer exposure time.
Driven by this rule, you might naively think that just the touch of your finger to adjust the aperture from f / 11 to f / 22, the exposure time can be expanded from 30 seconds to two minutes. In theory, this is not sinful. Unfortunately, there is a physical phenomenon is called optical diffraction, that is, when the aperture is smaller than f / 16, sharpness of the image will be significantly reduced. If you have used the f / 11 and eager to slower shutter speeds, reducing the ISO or use dimming filters will be the better choice.

Error 5: Forget adjust sensitivity
Speed ??Is a big boost long exposure time, and sometimes you might forget to adjust the sensitivity but only to take care of the aperture and filters? Remember that each camera has a sensitivity range, within which its output quality is almost the same. In the advanced camera, this is usually in the range ISO 50 to ISO 200. That means you’ll have to adjust the space of two branches. In two branches of long exposure photography means a few minutes exposure time.

Error six: like shooting in the studio with the same
When you are shooting in a cozy room or studio, no external factors can affect the quality of your photos. But if you’re standing on the rocks by the sea, facing the magnificent sea storm, it will not be long before your filter completely ‘wet body. ‘ Do not forget before leaving the bag with a clean lens cleaning cloth, even if you want to know the filter coated with the tiniest drop of water, will cause a sharp diffraction phenomenon, so that the photos destroyed. Never underestimate the power of nature, even the blue skies, the weather changes, but also is a Zhancha effort.

Error Seven: Choose inferior filters
Each plus a filter in front of the camera, the overall quality of our optical system will inevitably be reduced. Indeed, some well known brands of filters are very expensive, but do you really confident in putting a filter in front of dozens of blocks in front of your lens? No, never! So concerned about the quality of it: for filter quality and not quantity! You do not have to collect all models ND and GND filter. Try to understand Which is your most commonly used filters, then remember to use your ISO and aperture to complement filter. Finally, remember that more high-quality filters are actually very close to the people. To better use the Internet.

Error Eight: underestimate the power of the wind
When you make a long exposure, your camera will be as long as a few minutes of exposure to be appointed by the external environment, even the occasional visit of a few seconds, the wind will let you have lost. Buy a durable tripod, then it properly resettled. If it is necessary in order to put up the extra weight on the hook in the tripod, the tripod to increase stability. Avoid using a tripod central axis, the axis rises will decrease the stability of the tripod.

Error Nine: do not cover the viewfinder
Finally exposed for three minutes, only to find the preview photos full of mysterious purple fringing and halos. Why is that? Although the camera just to let light enter through the lens. But unfortunately there are still other potential via hurt your photos. The most famous of them is the viewfinder. In order to prevent light from entering from here, after focusing remember to cover it. If your camera does not give you a cap, you can use black tape, if there is no tape, unfortunately, the chewing gum is better than nothing. Viewfinder into the most typical result is light-induced halos. Right, if you have an anti-camera, then please ignore me again!
If you insert a filter system, then there may be another way to light leakage is a gap between the filter (which is why many photographers prefer to screw filter). In this case, the best solution is used by black tape. Filter leaky most typical manifestation is the emergence of purple fringing.
Finally, if you are using a shift lens or lens adapter installed, the light leakage problem may appear on the lens. The best way to solve this situation is to cover it with a scarf.

Error ten: credulity Filter Manufacturer
When you worked so hard to buy a six-speed ND filter, and naive enough to think that it really will give you the effect of the sixth gear. Unfortunately, you are mistaken again. In my lifetime, I have never found a filter with manufacturers to promote kept absolutely consistent, of course, this difference is usually small, but even half the difference profile, in the long exposure also means a few minutes error.

To avoid these mistakes, you can try the following steps:
Choose a room, close the window lights. (You need a light absolutely stable place)
Stand a good camera photo of the room, until you get a perfect histogram. Record all shooting data (speed / aperture / shutter speed).
The nD filter is installed on, and then adjust the parameter setting body, so that the exposure is consistent with the previous photo.
A photo shoot with ND filter
Observation of the histogram and compare two photos, if they are identical, indicating that the filter manufacturers label filter specification is accurate. If the new histogram to the left, you can filter specifications than he claimed to be superior; the other hand, if the right side, then the actual specifications of the filter is lower than the manufacturer’s label.

If the histogram cannot overlap, then change the shutter speed and then shoot one, in order to obtain a sample can be taken without the filter coincides histogram.
When you find the Heart of the filter after trying to establish their own shutter speed conversion table. The other possibility is to install PhotoPills applications on your smart phone, which permits you in case of use of filters, to quickly get the correct shutter speed.

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