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 projected by the lens onto the sensor, the smaller the focal length, the smaller the image scale. We can say that a lens with a large focal length enlarges objects, as if bringing them closer to the photographer, and with a smaller focal length – it reduces, moves objects away.
The focal length determines the angle of the image of the lens (angular field). For a lens with a large focal length, the image angle is narrow – enlarging objects, a telephoto lens fills the entire frame with them. A Continue reading
Imagine a terrible picture: you bought a reflex camera, and the pictures from it come out fuzzy. However, if you look closely at the pictures, you will find that the camera is focused, it’s just that a completely different object fell into the focus area, not the one you shot as the main one. Well, by the way, if your software supports focus points right on the picture.
Everything seems to be fine, but focused on the left eye (relative to me)
Focus, in such cases, “creeps” back to the background
(ie, further than the object, then its name is “back focus”, from the English back focus) or vice versa, Continue reading