Significance and disadvantages of wide-angle lens of hand-held binoculars

1, Wolf 8X45 belongs to wide-angle lens. Anything with a field of vision greater than a certain value is considered wide-angle, but it is greater than 6 degrees, which I forgot.

Most modern telescopes are wide-angle mirrors. It can be understood that if there is no special design, the magnification is certain, and the aperture larger than a certain value is a wide-angle lens; Wide-angle lenses are those with a certain aperture and a magnification below a certain value. At present, there are some methods to improve the field of view, but at the cost of obvious edge imaging distortion.

The landlord must think that telescopes with the same caliber and magnification can have wide-angle and non-wide-angle designs. Actually, this is not the case, but as long as aperture ratio is the same, such as 8x45, its visual field is basically the same. Unless there is a special design to increase the field of vision, small field of vision is a helpless choice under high magnification and small caliber, not a feasible choice, and I think unless there is a top telescope, a small caliber and high magnification telescope is a toy.

So I don't think there is anything wrong with wide angle. If there is a disadvantage, it is 1, and the edge imaging of wide-angle lens is poor and the distortion is obvious. 2. A telescope with the same aperture and high magnification must have a small field of view. On the other hand, the wide-angle magnification is not high, and the contradiction between field of view and magnification is just like the contradiction between large aperture and portability of a telescope.