Over the past weeks there's been a few posts about how grainy some of your displays are. Typically comes with instructions to test by 1) putting it into dark mode, 2) go to the settings page, 3) take a picture of the screen in a dark room.

Now for those of you who can visibly see the grains with your naked eye, this is not likely to concern you.

But for those you who can't see the grain but are surprised to see it when you take a photo of it, it's likely because when in dark mode, the camera of your phone or whatever camera, if in auto mode, might be bumping up the ISO which introduces a lot of grain in the photo, but is not indicative of the presence of grains.

Case in point - my eyes don't see any grain on my screen even up close. However:

The first photo of my screen is using my iphone with the lights on. But the fact that I'm focusing on a dark screen causes it to bump the ISO up to 1000. It looks grainy.

The second photo I took using my mirrorless camera. Iso at fixed at 125, same conditions. No grain.

That's my theory anyway.

• Darn autocorrect in the title. You're* using instead of yours.