How to check used lens before purchase?
All problems when choosing used lenses come down to one thing: they used a lens. This means that they were photographed a lot, put and removed from the camera, stored…

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Scatter Circle Size
A scatter spot (circle) is a distorted image of a point projected by a photographic lens onto the camera’s matrix or film. These distortions are caused, firstly, by structural factors,…

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How does a digital camera work?
For full control over the process of obtaining a digital image, it is necessary, at least in general terms, to imagine the device and the principle of operation of a…

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still perceived

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 lies closer or further than the depth of field zone is more or less blurred.

It should be understood that the concept of IPIG is quite arbitrary. There is no real and unambiguous depth of field in nature, since the lens at a time can be focused only on one specific distance, and not on some abstract range of distances. It is more appropriate to speak more about a focusing plane of infinitely small thickness, closer and further which the image begins to blur. Continue reading

What is the focal length?
The focal length (FR or ƒ) is the distance between the optical center of the lens and the camera sensor. The larger the focal length, the larger the image scale…

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How to overcome 6 fears of the photographer?
For most newcomers to photography, one of the biggest challenges is overcoming fear. This often leads to the fact that the photographer misses a great shot or does not even…

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Back button focus
According to an established tradition, autofocus is activated by pressing the shutter button halfway, and pressing it fully releases the shutter. However, it is often much more convenient to separate…

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HDR panorama
HDR is a technology that has existed for more than a year and is an adaptation of the image to the peculiarities of our eyes (the eye never sees the…

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