Previously, the material described below was part of an article about types of lenses, but the article grew and broke into two separate parts.
When choosing a photo lens, many users of photographic equipment immediately want to get a high-aperture 50-fold superzoom lens with the possibility of macro photography, beautiful bokeh and ‘razor’ sharpness. Unfortunately, no such lens for cameras with interchangeable optics does not yet exist. Blame the laws of physics and the complexity of manufacturing. Continue reading
For a better understanding of the operation of such a device I will give an example from life. When people look at the sun – they squint their eyes, that is, reduce the gap through which the light passes. If people did not squint, the sun would burn the retina of the eye with its strong light. At night you need to do the opposite – open your eyes wider to capture more light, while the pupils also expand. Eyes with large pupils have many animals that need to be seen well at night. Continue reading