Fix the light before you buy a webcam

Quick answer: Put a light source in front of you, raise the camera to eye level, and look at the result before you spend a dime. If the picture is still grainy or soft, then buy an external webcam, or use the phone you already own.

You've seen the call. A man sits in front of a bright window, and all that's visible is a dark shape with a halo. He sounds confident. He looks like a witness in protective custody.

He probably thinks he needs a better camera. He needs to turn his chair around.

Light does most of the work

A camera sensor, any camera sensor, is just collecting light. Give it plenty, aimed at your face, and even a modest laptop camera looks decent. Starve it, and every camera turns to mush.

Three rules, in order of importance:

• Face the window, don't sit with your back to it. Daylight from the front is free and flattering. Daylight from behind turns you into a silhouette because the camera exposes for the bright glass.
• Put a lamp behind your screen, not over your head. An overhead light carves dark pits under your eyes. A lamp sitting behind the monitor, aimed at you or bounced off the wall in front of you, fills your face evenly.
• Use one kind of bulb. Mix a warm yellow lamp with cool daylight from the window and your skin goes two colors at once. A daylight-color bulb in a plain lamp is a few dollars and solves it.

Evening calls are where this matters most. Once the sun goes, the only light on your face is the glow of the screen, and that makes you look like you're calling from the bottom of a well. Turn on the lamp.

Test it. Open your call app's preview, or the camera app, and look. If you can read your own expression without squinting, you're done with this step.

Then fix the angle

Most laptops sit on the desk with the camera pointed slightly up your nose. It's the least flattering position a lens can take, and it's the one you've been living with.

Stack the laptop on a few books until the camera is level with your eyes. That's it. No purchase required. A cheap laptop stand does the same job if you want it neater, but books work fine and you already own them.

Sit about an arm's length back. Close enough that your face fills the frame, far enough that you don't look like you're confessing to something. Leave a little room above your head.

Then do the one thing almost nobody does. Look at the camera lens now and then, not at the faces on the screen. It feels odd. On the other end, it reads as eye contact, and eye contact is what makes a person feel like you're actually listening to them. That's the point of the call, and it costs nothing.

When the laptop camera really is the limit

Sometimes you do everything right and the picture is still bad. Fair. Laptop cameras are squeezed into a lid thinner than a pencil, so the sensors are tiny and plenty of them still top out at 720p. In a dim room they get grainy and smeary. They also point wherever the lid points, which is a problem if you use an external monitor and the laptop is sitting off to the side. Then everyone on the call gets a profile shot of you looking at something else.

That's when an external camera earns its place. A few things are worth paying for, and a few aren't:

• 1080p is plenty. Call software compresses your video hard before it goes out. 4K sharpness mostly gets thrown away on the way. Don't pay for it.
• Autofocus and decent low-light performance matter more than resolution. Those are the things you'll notice.
• A clip that sits on top of your monitor puts the lens near where you're actually looking. That's most of the reason to buy one.
• Skip the built-in microphone in your buying decision. It's the weakest part of any webcam. More on that below.

A long-time default in this category is the Logitech C920, a 1080p camera that's been around for years and has been the pick of a lot of people who just want a call to work. If you want to step up, Logitech's Brio line goes higher on resolution and handles light better. Neither is the only sensible choice, and whichever way you go, check the current model and reviews before you buy, because this category turns over.

The camera you might already own

Your phone's camera is better than any webcam you'll buy at a reasonable price. The only trouble is getting it to act like one.

Recent iPhones can work as a webcam for a recent Mac, wirelessly, through a feature Apple calls Continuity Camera. Newer Android phones can act as a USB webcam when you plug them in. Check your own phone's settings, since support depends on the model and software version.

You'll need a way to hold it. A small tripod or a clamp-style phone mount runs about what a decent lunch does. Put it at eye level, plug it in so the battery doesn't die mid-meeting, and turn on Do Not Disturb so a text doesn't pop up while you're talking. If you take a lot of calls, it's worth the hour of setup. If you take two a month, it isn't.

Sound beats picture, every time

People forgive a mediocre picture. They don't forgive audio that echoes or cuts out. Somebody who can't hear you clearly stops listening within a minute or two.

So before you spend a cent on video, get a headset or a good pair of earbuds with a mic close to your mouth. If you haven't picked yours yet, buy headphones for your week, not for the review scores. And if your call stutters while the picture looks fine, the culprit is probably your connection. The home internet numbers that matter, and the ones that don't will tell you which one to check. Upload speed is the one that matters here.

Tidy what the camera sees

Look at the corner behind you in the preview. Laundry on a chair. A pile of mail. A door standing open to the bathroom.

Clear the frame. You don't need a studio, just a wall that doesn't distract. A bookshelf, a plain wall, a framed picture. Spend two minutes on it. It's a courtesy to the people you're talking to, the same way showing up with your shirt tucked in is.

Kids and a dog wandering through the background are fine. That's a real house, and nobody sensible minds. A mountain of dishes is a different matter.

Cover it when you're done

An external webcam you can unplug is the simplest privacy fix there is. For a built-in one, a sliding cover costs a couple of dollars and takes ten seconds to fit. Use one. And keep your accounts locked down while you're at it, since a stolen login does more damage than a camera ever will. Lock down every account you own in one evening walks through it.

The test

Before your next call, open the preview and ask yourself one question. If a stranger saw this, would they think you took the other person seriously?

Turn the chair, stack the books, switch on the lamp. Do it before you shop. Nine times out of ten, you'll find the camera was fine all along.