Mako2011 wrote:

Polycarbonate can withstand forces nearly 200 times stronger than steel. 2DPA-1 and Hemp Plastics are also much stronger than steel

This is a bit of a weird one. You'll often hear things like "spider silk is stronger than steel", or in this case, various plastics are stronger than steel, but the figures never really hold up.

For example, if you look at the young's modulus (the point at which a material elastically deforms), you get these figures:

Hemp plastic: 23 GPa

2DPA-1: 12.7 GPa

Steel: 150 - 200 GPa

In terms of tensile strength, you get:

Hemp plastic: 60.2 MPa

2DPA-1: 488 MPa

Steel: 950 - 2690 MPa

Unless my knowledge of physics is totally corrupted, I'd say the plastic strength claims are probably made by manufacturers of plastics.

Not that any of that matters, because camera lens cases aren't made of those materials, but you know, I just like something solid.