Learn Hardcore Romanian: Aparatul foto este gata.

In normal English, you would just say the camera. Romanian often uses noun combinations like this, where the first noun is the main thing and the second noun helps specify what kind it is.

aparat = device, apparatus
foto = photo / photographic

So aparat foto = camera, and aparatul foto = the camera.

Why is the word the attached to aparat instead of being a separate word?

Romanian usually puts the definite article at the end of the noun, not before it like English does.

So:

aparat = a device / device
aparatul = the device

This ending -ul is the definite article for this noun in the singular.

That is why aparatul foto means the camera, not aparat foto.

Why is only aparatul marked as definite, and not foto too?

Because in Romanian, in a noun phrase like this, the definite article usually goes on the main noun.

Here, the main noun is aparat. The word foto just specifies the type.

So:

aparat foto = camera
aparatul foto = the camera

You do not normally say aparatul fotoul or anything like that.