We’re always iterating on the TC-1 format. If you have questions, comments or ideas, please send an email to TechCrunch+ Editor-in-Chief Alex Wilhelm at [email protected].

The TC-1 helmet promotes a very low degree of neck fatigue which helps firefighters during long incidents. We offer several options when building your custom TC-1.

We’re always iterating on the TC-1 format. If you have questions, comments or ideas, please send an email to TechCrunch Managing Editor Danny Crichton at [email protected].

The new Sigma TC-1411 teleconverter increases the focal length of L-mount lenses by 1.4x, and the TC-2011 by 2x. They are compatible with the new 100-400mm F5-6.3 DG DN OS Contemporary lens. The Sigma ...