A rating system exists, and an undistorted lens is designated as 1/1/1/1, though 1/1/1/2 is also widely considered a professional standard.The amount of control you have over sensitivity and speed varies from one helmet to the next, so you’ll need to check those. Cheap models still go clear, but the view can be slightly fuzzy. If it’s too thin, it might be prone to cracking if knocked or dropped.Small things like ear protection, a browband to absorb perspiration, or air vents to keep you cooler can make a big difference if you’re wearing your welding helmet for extended periods.A larger screen makes it easier to see what’s going on, but as they are LCDs any additional size often means more expense.You also want good optical clarity. A lightweight helmet with good adjustment of the headgear generally provides more comfort, but it’s important to check shell structure.
