As is well known, our 57x 850mm long-range zoom camera is smaller in size (only 32cm in length, while similar products are generally over 40cm), lighter in weight (6.1kg for similar products, while our product is 3.1kg), and higher in clarity (about 10% higher in clarity testing line) compared to the same type 775mm motorized zoom lens. Apart from the multi-group linkage technology and integrated design, another very important factor is the use of aspherical lens design.

What are the benefits of using aspherical lenses in telephoto lenses?

Eliminating spherical aberration

Spherical lenses can cause spherical aberration, which means inconsistent image quality between the center and edges of the lens. Aspherical lenses can correct this spherical aberration, resulting in clearer and more uniform imaging.

Improving optical quality

Aspherical lenses can improve the quality of the optical system, making imaging more precise. They can reduce aberrations such as coma, field curvature, and chromatic aberration, thereby improving imaging accuracy and consistency.

Increasing resolution

The use ofpherical lenses increase resolution, allowing for more detailed display of details. They can reduce light scattering and chromatic aberration, thereby improving image clarity and sharpness.

Reducing lens weight and size

Compared to traditional spherical lenses, aspherical lenses can be thinner, thereby reducing the weight and size of the lens, making the camera equipment lighter and more portable.

Increasing flexibility in lens design

The use of aspherical lenses provides lens designers with more freedom and flexibility. They can be designed according to specific imaging needs to achieve better imaging effects.

In summary, the use of aspherical lenses can improve image quality, increase resolution, reduce weight and size, and provide greater flexibility in lens design. These characteristics make them an indispensable component in telephoto lenses.

At the same time, aspherical lenses are more expensive, so nowadays many electric zoom lenses do not use aspherical lenses in order to reduce costs.