![]() ![]() ![]() I then “stacked” the 9 images in Photoshop (more about this later), resulting in the following image, which is now sharp from front to back: Crocodile at the “Ferme aux Crocodiles”, Pierrelatte, France (Focus stacking from 9 shots) #Helicon focus eos r series#So I took an additional manual focused series of 9 pictures at aperture 8 with different focal planes, at that time manually focused with my Sony Alpha 7R III and the Sigma 60-600mm DG OS HSM. 8m from the crocodile at 600mm focal length. in the following picture, which was taken at 600mm focal length at an aperture of 32: Crocodile, “Ferme aux Croq”, Pierrelatte, FranceĮven at aperture 32, the depth of field is only about 30cm at a distance of approx. An exampleīut even when photographing with telephoto lenses, the depth of field is sometimes not sufficient. For example, the depth of field in the 1:1 macro range is only 2 mm at an aperture of 16. A depth of field calculator for the macro range can be found here, for example. small objects, where only a minimum depth of field can be achieved even with a very small aperture. This is especially common with macro shots, i.e. In some situations even the smallest aperture is not sufficient. Things are different if you want to display a three-dimensional object completely in focus. Fast lenses are particularly suitable for this purpose. In many cases, a depth of field as shallow as possible is even desired in order to isolate a subject. You can control the depth of field during shooting by selecting the aperture. you get closer to the object (macro photography).a longer focal length is used (telephoto lenses).the aperture is opened further (smaller aperture number).I do not want to go into further details here. The area in front and behind of the focal plane which is still sufficiently sharp is called “depth of field”.įurther information on this topic can be found in the Wikipedia article. So back to the camera: The range of sharpness depends on the lens aperture, the focal length and the distance to the subject. With increasing age, our eye lens gets more and more rigid, then the only thing that helps is wearing glasses - Ok, I’m digressing… For accommodation, it they can change the refractive power of the eye lens to make us see sharply either near or far (i.e. In front and behind of this plane, all objects are displayed more and more blurred with increasing distance. Some optical basicsĪll lenses focus on only one plane at a certain distance, called the “focal plane” and the distance to this plane can be read directly from most lenses. The plane of sharpness thus moves from image to image towards the beckground. The camera takes an editable number of pictures in quick succession and shifts the focus backwards in adjustable steps. The Canon EOS R5 and R6 offers a new function in its menu, the “Focus bracketing”. ![]()
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