If you look through the lens at a distant point, the point image will not move when the lens is rotated slightly about a vertical or horizontal axis the goes through the nodal point. This is called the optical center.
With a thin lens this is close to the geometric center, with a longer complex lens the optical center is buried somewhere inside. The optcial center of a complex lens may or may not be inside an element.
In my experience, generally I known optical center of the lens is the thinnest point of minus lens or the thickest point of plus lens. And in that point (optical center) we can see directly through the lens without any distortion, if the power (dioptry) of lens is correct for your eye. Also we can find it (optical center) by used lensmeter.
It depends on the lens one has on it at the time. The lens is interchangeable.
No, the optical center of a lens is the point on the lens axis that is unaffected by refraction, while the geometric center is the physical center of the lens. The two may not coincide depending on the shape and design of the lens.
300m
Yes. 5X SCHNEIDER-KREUZNACH VARIOGON Optical Zoom Lens
The optical center of a lens is a point on the lens axis where light passing through the lens does not deviate, regardless of the angle of incidence. It is often used as a reference point for optical calculations and design. The optical center is typically at the geometric center of a lens with a symmetrical shape.
Optical zoom cameras are used to take a shot in which a far-away object appears both prominently and clearly. Essentially you need a decent zoom lens to obtain this ability, and a good camera with a widely-adjustable lens offers this feature.
That depends on the lens you put on the camera.
The optical center of a lens is the physical center point of the lens where light rays passing through it converge without any deviation. This point is important in determining the optical axis of the lens and is often used as a reference point in lens designs and calculations.
axis or optical center
That depends on the lens that is mounted on the Sony A33 DSLR.
Optical Zoom is the true zoom, Digital is basically the zoom in of what the highest optical zoom is. Therefore Optical Zoom is the better zoom, and gives a much clearer picture.
The optical center of a Kryptok 22 lens is typically located at the geometric center of the lens. This is the point where light rays passing through the lens converge without significant deviation.