Fuji gets titanium, Olympus gets...plastic?

Started 2 months ago | Discussions thread
cba_melbourne Senior Member • Posts: 1,398
Re: Fuji gets titanium, Olympus gets...plastic?
7

Mitrajoon wrote:

The plastic used is as strong as Titanium and bounces better.

Polycarbonate has roughly 1/8 the tensile strength of Titanium, and weighs about 4 times less by volume. Hence, Titanium is about twice as strong for the same weight.

Titanium "bounces" quite well too, it can easily bend and stretch without damage. For example, there are springs made of Titanium, just as there are springs made of Polycarbonate.

Titanium parts cost a LOT more though, because Titanium is a beast to machine or form. Whereas Polycarbonate can be very cheaply mass produced by injection molding. Titanium can be injection molded too, but it's melting point is 1,668C. Plycarbonate melts already at 225C.

For comparison, Magnesium which is also often used for camera chassis melts at 650C. It has about 3-4 times the tensile strength of Polycarbonate, and weighs only about 1.5 times as much. It is rather brittle though, meaning it breaks easily when bent.

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