Sometimes novice photo enthusiasts do not know which mode to use when, while reading the instructions, but have not figured out... Pick up your camera and take a look at the flash control mode. Typically, these modes are displayed in the control panel to the left camera. If the menu flash synchronization mode will find SLOW - this article will be helpful.
Now we consider the action SLOW mode on the example of two photos presented here. The picture on the top left is made in the normal mode, Fill-flash, below - mode SLOW. These photos were taken on a cloudy day in the afternoon (in the evening); shooting mode «A» (aperture priority); pulsed light - External flash Nikon Speedlight SB-900 (TTL-BL).
In automatic mode, the metering system TTL determines the intensity of the reflected light from the foreground object, ignoring the brightness background. For this reason, we have the correct exposure for the main object, in this case, two girls and a failed dark background (photo left). To save our photo
to save the reputation of not being disgraced before the girls, that is, get rid of the dark background in the control panel to set the camera settings, flash sync mode SLOW; Again the girl says the right words, make a new picture and see how miraculously burst background natural light (photo below left).
This mode with characteristics very similar to one of the scene modes referred to as "night portrait" (auto slow sync), which is almost all the SLR (on the Mode Dial Shooting - silhouette of a man and a side asterisk). Subject Program "night portrait" I never use because I do not like to work in a fully automatic mode. But if you're not used to working in a semi-automatic modes such as «A» or «S», - can start with it...
SLOW flash mode is effective in low light conditions (in cloudy weather or when twilight). The slow synchro mode camera controls flash power and endurance, setting parameters such exposure, in which the main subject and background correctly exposed. Extract when the flash fires increases to the level at which it becomes possible to capture background lighting with natural light. See photo at left.
when the flash SLOW, the camera sets the appropriate shutter speed to her in spite of the limitations set forth in the menu of the longest shutter speed in a flash. For example, you set the camera's shutter speed is not less than 1/60 sec., And the camera can take and safely ignore your settings by setting a full second exposure, which will inevitably lead to a blurring of the image, unless you use a tripod.
This mode is also useful for shooting Bust of, when you want to save the natural background illumination. The use of high-aperture optics when shooting in SLOW, to some extent, reduce the risk of blurring the image, because aperture optics allows you to set faster shutter speeds in low light conditions. As for kitovskih aperture lenses with mediocre - here it is necessary to use a tripod to prevent camera shake at the appearance of the images.
But again, it all depends on the shooting conditions. If daylight conditions allow the use of restraint at least 1/60 sec. - Do not worry. Firmly secure the camera in hand, you can avoid blurring images due to some slow shutter speed. If your lens has an image stabilization, - use it. Slow synchronization allows you to technically high-quality images even in difficult conditions such as shooting in the church, where the ceiling can not serve as a reflective surface.
If your family photo archive thoroughly amazed "syndrome black background" - it's time to change the camera on that which has this amazing flash mode, or learn how to use. Thank you for your attention.