Intro to HDR
is a technique that has become available in the recent times. It is designed to improve the overall impact of usually a landscape photo which has contrasting parts in terms of the availability of light. It is the difference between the brightest and the darkest part present in a single frame.
Our eyes have an amazing dynamic range and are easily able to understand the subtle differences between the reflections of light that is taking place when viewing a large area.
The image that our eyes capture, are perfect in terms of the distribution and diffusion of light in a natural manner because of the dynamic nature of these images. We can easily see the diffusion and different intensities of light sources for example present in the sky at the dusk.
Cameras on the other hand have smaller dynamic sensitivity. They can either take a bright photo with high sensitivity or dark photo with reduced sensitivity. They traditionally failed to do justice to such scenes with variable amounts of light in the frame. HDR photography is the answer to that.
The camera attempts to cover a greater sensitivity range by taking a number of photos and then inter-mixing them to get a better blend of the actual lighting present in the frame. This technique is perfect for taking landscape shots at the times of dawn and dusk.
All modern cameras are built with an HDR shooting mode. It is essential though to learn to use this mode. First of all, as it involves the taking of multiple pictures to improve the landscape, it cannot be used to take the photo of a moving object.
HDR shooting provides better results, if the camera is placed on a stable platform and used to take the photo of a scene that is not changing quickly in a dynamic manner. This means that the technique is limited to landscape photography.
This does not mean that HDR photography is not important. It can be extremely important for nature photographers. You need to learn to use the mode by tampering with the available settings. Unfortunately, the automatic HDR mode on a camera does not offer the same advantages as offered by the other automatic options present on high end cameras.
Expert photographers learn to improve their HDR shooting by changing the exposure as well as using a stable platform. Other skills that you require for HDR shooting are to understand the effects of changing ISO settings on your camera as well as looking at the time of exposure. HDR photography also requires interested individuals to learn about the different Photoshop options that are available for improving the contrast difference present in the final frame.
You should also learn more about the AEB (Auto Exposure Bracketing) mode on your DSLR camera. This mode allows you to take multiple photographs at different exposures. You can then use different image processing software tools out there to perform a merger in order to create a picture. You can play around with the available pictures to ensure that you are able to finalize an image which perfectly represents the actual scene that you observed.
Another important concept of HDR shooting is that you simply cannot rely on your hand. You need to get a tripod in order to shoot the perfect HDR photos. Avoid scenes or situations where you find moving objects because they will appear as a ghost in the final processed image. This happens because the software tries to prepare an image by giving importance to all the elements and objects present in a set of images.
In HDR shooting, there is no single shot, but your DSLR camera will always have quite a lot of advanced settings to use when performing HDR photography. It is often best to use a fixed aperture value and allow the camera to select the appropriate shutter speeds for the different shots. You can use manual setting, but then you will have to set the shutter speed as well, making it difficult to obtain the best results.