Why magnesium alloy????

Started Apr 19, 2013 | Discussions thread
user_name
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Re: Why magnesium alloy????
In reply to gipper51, Apr 20, 2013

The big issue with plastic is one of rigidity.

Magnesium is superior in that it does not warp with mild heat and can retain critical dimensions that plastic can not.  It is also superior to plastic as far as machining precision goes.

Internal components and the image sensor need to be accurately aligned relative to each other.  Magnesium or other metals offer a much better scaffold for critically positioned parts than plastic by a wide margin.

While I am not sure about this, I suspect that internal vibration dampening may be another issue when metal may have an advantage.

So, it is a trade off between durability, cost, and precision.  Everything is a compromise to one extent or another.

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