Aperture, focal length and exposure
These three elements are what I would call the existence of the camera.Due to the rules of the optics, certain optical effects can only be effected by the correct combination of these three. The limits of technology then determine to what extent these factors can be realized. This is the reason why you can only get certain motifs with digital tricks or not at all with mobile phones, and why cameras sometimes need eternally long lenses. Hence the following approaches:
With in mind,
I have three ways to have a motif emerge from the background.The first is the silhouette, and all you need is a very bright background. The outline arises by itself if the motif is not illuminated from the front.
On the other hand, there is the depth blur, i.e. the effect at which the background (and, if necessary, the
the foreground) appear blurred, and thus sharply expose the motif.
This is theoretically also possible with a mobile phone, but the tiny opening/aperture makes the area in which everything appears sharp very large.
Since this is always a part of the distance to the subject, one must accordingly very close, if one wants to have with the mobile phone the hint of a depth blur.
In contrast to the image with sheet, you can see directly how many areas of the image are almost still quite sharp.
The aperture is simply too small here. (PS: The larger the number of apertures, the smaller the opening.) These types of shots still require a corresponding lens with a longer focal length and large aperture. Which in turn increases the required light, because less light falls into the long pipe.
In third place is the freeing by motion blur.If you have a subject that moves, you can follow the camera with longer exposure times (1/10 to 1/100), causing the subject to be sharp, but the background blurred. You may know such photos from racing or car advertising.
The most important thing for all three approaches, however, is that you have at least a clue how to use your technique.Therefore, it is sometimes appropriate to spend the few minutes studying the manual or a tutorial video. Aperture preselection and exposure time preselection are the first important steps to take better photos.
After all, it is possible to consciously aperture, etc.consciously, you can deliberately cause things like aperture effects (lens flares). Here, too, the size of the aperture is important.
The sparkle (one of the aperture effects) on the chain is created by a very large aperture.
The trees in the background are blurred because the sharpened area is smaller than the distance from the chain to the trees in the background. The rule for this is: large number of apertures, close to the motif and large distance to the background.