![]() ![]() Now that we've established why focus stacking is important in regards to macro photography, let's dive into ways you can capture the images necessary for focus stacking.Ī perennial favorite for macro shooters is the use of a focusing rail to move the camera forward/backward at set intervals. In short, focus stacking allows us to obtain exactly the DOF we desire in a scene while maximizing sharpness at the same time (assuming an aperture wider than the camera's DLA is used). Noticeable sharpness and contrast penalties are incurred when using apertures significantly narrower than a camera's DLA, so shooting at f/5.6 allows you to obtain the sharpest image within your DOF. And the second (probably more compelling) reason is that the cameras listed above have DLAs ( Diffraction Limited Apertures) of f/6.7 and f/6.6, respectively. The first is that even if you used f/16 with the 5Ds R under the shooting conditions listed above, your DOF would only increase to 0.23" (5.84 mm) which still won't be enough DOF to cover your subject under a lot of macro shooting conditions. With such a shallow DOF at f/5.6, why not just use a much narrower aperture to gain more DOF? There are two main reasons. Zoom in helicon remote full#Note that if a 7D Mark II were used and the framing remained identical between the two cameras, the APS-C 7D II's DOF would be greater than the full frame 5D Mark IV's (see FOVCF). Switch out the 5D Mark IV for an EOS 7D Mark II and the DOF would change to 0.05" (1.27 mm). Macro photography, especially as magnifications of 1.0x (or greater) are achieved, necessitates focusing on very close subjects, which in turn produces a very shallow DOF even at relatively narrow apertures.įor instance, using a Canon EOS 5D Mark IV and an EF 100mm f/2.8L IS USM Macro lens set to f/5.6 with a subject distance of 11.8" (the lens' minimum focus distance), your DOF would be approximately 0.08" (2.03 mm). Your DOF is determined by the relationship between format size (full frame or APS-C), focal length, aperture and focus distance. Focus stacking allows you to gain more DOF (depth of field) so a larger portion of your frame can be in sharp focus.
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