Tonal range values
The tone of a photographic image is determined by the proportions in which black, white, and gray tones are correlated. Degrees of tonality in photography The human eye recognizes up…

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Factors affecting bokeh
The number and shape of aperture blades The arrangement of the lens aperture affects not so much the quality of the blur as the shape of the blur circles. In…

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Discipline
Don't shoot thoughtlessly. Although your emotional reaction to the scene may be spontaneous, it should lead to a non-spontaneous act of shooting that requires attention and accuracy. Negligence at work…

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appear

The strategy for choosing the optimum diaphragm

Find the aperture value at which your lens shows the best sharpness, and use this value whenever possible (most often it is f/8 or so).
If you don’t have enough light, or if you want to highlight the main subject using a shallow depth of field, increase the size of the aperture, but try not to open it completely unnecessarily.
If the need has come, feel free to open the diaphragm and do not worry about it. In situations where you may need it, the aperture value is not the most important factor limiting the sharpness of images. The wiggle spoils the image much more ruthlessly than any lens aberrations. Continue reading

Factors affecting bokeh
The number and shape of aperture blades The arrangement of the lens aperture affects not so much the quality of the blur as the shape of the blur circles. In…

...

Discipline
Don't shoot thoughtlessly. Although your emotional reaction to the scene may be spontaneous, it should lead to a non-spontaneous act of shooting that requires attention and accuracy. Negligence at work…

...

Sharpness
Is sharpness important for a good photo? Yes and no. On the one hand, a technically perfect photo should usually be definitely sharp. No matter how interesting it may be…

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