7. Prism type: roof prism, Porro prism 8. Prism material There are two types of prisms commonly used in telescopes: bak-4 and bk-7 prisms. BAK-4
1. Objective lens diameter The diameter of the telescope is the diameter of the lens of the telescope. The telescope model generally clearly indicates the
A telescope is a visual optical instrument used to observe distant objects. It can magnify the small opening angle of distant objects at a certain
A telescope is an optical instrument that uses lenses or mirrors and other optical devices to observe distant objects. The light passing through the lens
This is an inspection checklist for the average purchaser who has a few notions about how a factory is run but has no specific training or experience in quality and manufacturing management.
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