Bahtinov mask

Hey kiddo, do you know that photographers and amateurs love to take pictures of the stars and the moon? And sometimes, it can be tricky to get them in focus? That's where a bahtinov mask comes in handy!

A bahtinov mask is a tool that helps photographers focus their camera perfectly when taking pictures of the stars. It's named after a Russian astrophotographer named Pavel Bahtinov who invented it.

It's like a little plastic or metal frame with three thin pieces of metal, called vanes, sticking out of it like a Y shape. When you put it over the lens of your camera, it splits the starlight into three different directions. This creates a pattern on your camera's screen that helps you see if your focus is in the right place.

You will look through the viewfinder, and adjust the focus of your camera until the pattern appears symmetrical. When the pattern is symmetrical, it means your camera is in perfect focus, and you can take those amazing starry night shots you've always wanted!

So, that's the bahtinov mask. It's a simple tool that helps photographers capture beautiful shots of the night sky, just like you capture photos of your Lego creations!