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Review Summary
Using an aspherical lens to increase the field of view, which has traditionally been a drawback of zoom eyepieces.
The design ensures a wide field of view through the entire zoom range and a flat field all the way to the edge of the lens. The newly developed optical design reduces the deterioration of the image at high magnifications.
Kowa TE-10Z 20-60x Zoom Spotting Scope Eyepiece has 10 lens elements in 6 groups and uses an aspherical lens to increase the field of view, which has traditionally been a drawback of zoom eyepieces. This design ensures a wide field of view through the entire zoom range and a flat field all the way to the edge of the lens. The newly developed optical design reduces the deterioration of the image at high magnifications.