I made this 2 piece tpu case for telescope lenses.

This was a very long couple of prints over 30 hours combined. It's for an Orion telescope that's why the Orion drawing.

How well does the TPU do for impact protection?

Very well. Significantly better than the cardboard boxes it replaced.

What software did you use to model it?

This was all tinkercad believe it or not. But if you need something stronger check out freecad.

Not OP but Fusion 360 could get this done pretty easily.

Plus the hobbyist license makes it free to use.

That looks awesome! Great job! Did you design this case yourself?

Thanks yes I designed it myself =)