Diffraction
Diffraction is an optical phenomenon that limits the sharpness of a photograph while reducing the relative aperture of the lens. Unlike other optical aberrations, diffraction is fundamentally unremovable, universal and…

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Camera modes
Today, any digital camera offers the photographer a frightening variety of shooting modes. Due to the fact that the instructions for the cameras describe the features and purpose of a…

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Sharpness
Is sharpness important for a good photo? Yes and no. On the one hand, technically perfect photography, as a rule, should be absolutely sharp. No matter how entertaining it may…

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other fundamental

How to find out the pixel size of a matrix?

Why might a photographer need a pixel size? There are enough such situations. Knowing the pixel size can be useful for determining safe shutter speeds when shooting with handhelds, because the smaller the pixel, the more noticeable the camera shake appears in the pictures, and the shorter shutter speed may be needed to eliminate movement. Having no idea about the pixel size of the matrix of your camera, you can not seriously talk about the depth of field, since the allowable diameter of the scattering circle directly depends on the size of the pixel. The value of the diffraction-limited aperture for a particular camera also depends on the pixel size. Finally, it is possible that when comparing multiple cameras, you will want to find out which one has a higher pixel density, which means it provides better detail and is more suitable for shooting distant objects.

The instructions for digital cameras very rarely indicate the pixel size of the matrix, but, fortunately, this parameter is quite easy to calculate on your own.

In most instructions, you can find information about the physical size of the photomatrix, as well as its linear resolution, Continue reading

Image angle

The angle of the image or the angular field of the lens is the angle formed by the rays connecting the extreme opposite points of the frame with the optical center of the lens. In other words, this is the maximum angular size of an object that can be captured using this lens.

The wide angle of the image allows the lens to cover more space due to the small scale of the image. The narrow angle of the image shows less space, but on a larger scale.

Since the frame has a rectangular shape, it is necessary to distinguish the angular field, measured horizontally, vertically and diagonally. In the technical characteristics of photographic lenses, the largest, i.e. Continue reading

Diffraction

Diffraction is an optical phenomenon that limits the sharpness of a photograph while reducing the relative aperture of the lens. Unlike other optical aberrations, diffraction is fundamentally unremovable, universal and equally common to all photographic lenses without exception, regardless of their quality and cost.

Diffraction can only be seen at 100% magnification. Notice how the image becomes less and less sharp with increasing aperture.
With the passage of light through the aperture, the bulk of the light waves continues to move rectilinearly. However, those waves whose path lies near the very edge of the diaphragm deviate from their original direction, trying to go around the obstacle that has arisen on their way. The smaller the size of the aperture Continue reading

7 mistakes of any photographer
If you are a photographer, you have at least seven funny stories that you would rather not remember. Well, yes, it is - as it is human nature to make…

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Depth of field
Depth of sharply depicted space (depth of field) is the distance between the closest and farthest object in the scene, which are perceived in the photo as sharp. Everything that…

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Optimum Aperture Selection
The ability to effectively use an existing lens has a much greater effect on the sharpness of a photograph than the choice of the lens itself. The number of apertures…

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How to take pictures in the cold?
Happy New Year, winter finally arrived, with snow and frost, and for many, the question arose about shooting in frosty weather, how to handle photo equipment. Not everything is as…

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