亚博2020

Objective aperture (effective aperture)

The effective aperture of the inner diameter (mm) of the lens frame of the objective lens (front). The larger the aperture of the objective lens, the stronger the ability to collect light, and the higher the resolution and brightness of the image formation. However, at the same time, the weight and cost of the telescope will increase with the large objective aperture lens, so the maximum operation should not exceed 50 mm.
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