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The true 50-caliber light-entry foot picture is brighter, and each optimization effect is both a cost consideration and a breakthrough in the technical threshold; the large objective lens has a wider field of view and the light-entry amount is brighter.
Low-dispersion ED lens eliminates chromatic aberration imaging without purple fringing, purple fringing will occur after ordinary glass is refracted; ED lens is better for correcting chromatic aberration
The 8 ~ 12 magnification is the hand-held gold magnification: don’t be greedy for high magnification, the higher the magnification is, the clearer and farther you look. The magnification is too high and the image is jittery and blurry. Most military telescopes are 8 ~ 12 times
SMC high-definition coating has high light transmittance and clear imaging: this coating is burgundy, in order of light transmittance: wine red film > green film > blue film, the better the coating, the higher the light transmittance. The clearer the color of the picture
The BAK4 prism phase film is coated with high-reflective dielectric film for high-definition and sharp imaging. The prism group is coated with phase film, high-reflective dielectric film and reflective film. The contrast is higher and the image is sharper in the low light environment at night.
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