![]() ![]() One of the advantages of the focus stacking technique is the lens can be set at its optimum aperture to give the best possible quality. A smaller aperture could have been used to get greater depth of field but the image quality would be affected due to diffraction effects if too small an aperture is used. Single shot taken with Canon EOS 40D with Tamron 90mm macro lens at f/5. These can easily be cropped from the final image but it is worth noting that it is a good idea not to frame the image too tightly when taking the photos. This is a full frame image which has been resized to fit on the page and shows the edge effects to the left and right of the image resulting in the text being reflected and also edge effects at the top and bottom. Image combined using CombineZM from a series of 40 individual shots shot taken with a Canon EOS 40D and Tamron 90mm macro lens set f/5. Once the pictures have been taken they can be combined using free software such as CombineZM or commercial software like Helicon Focus (the example on this page was combined using CombineZM). ![]() There is no need to touch the camera and the mirror stays locked up during the sequence which minimizes the chances of camera shake or movement. The live view display in DSLR Remote Pro for Windows makes it very simple to automate the process of taking a sequence of images with different focus settings by running a script. This technique is useful for macro and close-up photography, landscapes, product photography and any other image where the depth of field is critical and the subject isn't moving. Focus stacking is a technique for increasing the depth of field by taking a series of photographs with different focus settings and then combining them together using the areas in focus from each image. ![]()
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