The lens structure can be understood as the structure of the lens, which is mainly composed of lenses. At present, the lens of any camera cannot be composed of a single lens, as is the case with standard lenses and functional additional lenses. A lens is often composed of multiple lenses, and these lenses will form a group according to need, so as to restore the object to be captured as clearly and accurately as possible.
The structure of the lens mainly refers to the number of lenses constituting the lens. Since different manufacturers and different products use different technologies, it is absolutely impossible to simply think whether the number of lenses is good or the number is small! The number of lenses of different lenses is identified by numbers, which can be described at a glance. For example, "Canon EF28-105 / 3.5-4.5U", the label is 15 elements in 12 groups, which means that this lens has a total of 15 lenses, which are divided into 12 lens groups, some of which are 1 lens In groups, some are in groups of two pieces to achieve different functions.
Tape measure is consist of case,belt,click lock,hook,magnet,clap,protective,blade and spring.
Case can be divided into four types.They are plastic case/ABS case, rubber coating, twice-injection case, UV chroming case.
Hook can be divided into four types, they are common hook,cat hook,sheep hook and flat hook.
Belt can be divided into two types, they are PVC belt and nylon belt.
Normal package is single package, inner box, carton. Customer can customn the package.
Tape measure can be used for construction site or household.
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Tape measure is consist of case,belt,click lock,hook,magnet,clap,protective,blade and spring.
Case can be divided into four types.They are plastic case/ABS case, rubber coating, twice-injection case, UV chroming case.
Hook can be divided into four types, they are common hook,cat hook,sheep hook and flat hook.
Belt can be divided into two types, they are PVC belt and nylon belt.
Normal package is single package, inner box, carton. Customer can customn the package.
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