What are macro rings are ordinary hollow tubes that change the working length of your lens. That is, it’s just a tube that is placed between the lens and the camera.
How they work – imagine that you are focusing on a fixed lens, one of the old ones, where the entire lens unit (all lenses) goes when focusing, you twist the focus, all lenses go slowly (the trunk of the lens lengthens), leave and leave as far as the design allows you lens. But the focus is spinning to a certain value and in order to draw out (push back) we add rings even more. Of course, in modern lenses, focusing sometimes happens differently, because the explanations are given just for example. Continue reading
One of the most important and basic parameters of any photographic equipment is the size of the photosensitive sensor of the camera. And this is not about megapixels, but about the real physical area of the photosensitive element.
Previously, most photographers were shooting on film cameras, which used the so-called 35mm film (standard film from the distant 1930s). These were quite old times, and somewhere since 2000, digital mirror cameras (CCP) became very popular, the principle of operation of which remained the same as in film cameras, but instead of CCP film they began to use an electronic photosensitive matrix, which forms the image . Continue reading
Vignetting is the effect of darkening the corners of an image. Often, vignetting is simply called ‘vignette‘
In a broader sense, vignetting is a change in the brightness of an image from the center to the edges of the image. You can also do ‘vignetting on the contrary’, when the edges are brighter than the center of the image.
The above is an example of vignetting that gives a Nikon 50mm f / 1.8D AF Nikkor lens when used on a Nikon D700 full-frame camera and with a full aperture, the lens is focused to infinity, a white sheet with a tripod is photographed. In the corners of the image, a drop in brightness is noticeable, and the brightest part of the image is in the center of the image. Continue reading