Lenovo ThinkPad X1 Carbon Screen Protectors

The Lenovo ThinkPad X1 Carbon has a 14-inch display. That figure is the diagonal measurement, so it doesn't on its own tell you a protector will fit, two devices with the same diagonal can have different corner radii and cutouts. Always buy one listed for the Lenovo ThinkPad X1 Carbon by name.

Privacy is the default choice for the Lenovo ThinkPad X1 Carbon. A micro-louvre layer narrows the viewing angle so only the person in front sees the screen.

Worth knowing before you buy: noticeably dimmer, expect to raise brightness; awkward for sharing photos or watching video with someone.

Somewhere between £8 and £25 covers almost everyone. Under about £8 you're usually buying glass with no oleophobic coating, which looks fine for a week and then smears permanently.

Above £25 you're paying for a warranty, a better applicator, or a speciality finish like privacy or paper-feel. Those are real benefits, but they're refinements. The jump in protection from nothing to a £10 protector is far larger than the jump from £10 to £30.

Only if you buy a magnetic or slide-in filter. Adhesive ones are effectively permanent, and a privacy filter makes it impossible to show your screen to anyone standing beside you.

Given that a privacy filter also dims the display for you, removability is worth paying a few pounds more for on a laptop you use for presentations or pair programming.