Learn German: Wir haben hier keine Kamera. - We don't have a camera here.

In German, when you want to negate a noun that would normally use "a" or "an" (an indefinite article), you must use a form of kein. You cannot say nicht eine Kamera. It helps to think of Wir haben hier keine Kamera as literally meaning "We have here no camera."

Since this is the accusative case, why is it keine and not keinen?

The verb haben (to have) always requires the accusative case for its direct object. However, Kamera is a feminine noun (die Kamera). In the accusative case, only masculine nouns change their endings (taking -en, like keinen). Feminine nouns keep the exact same -e ending they have in their basic dictionary form, which is why it stays keine.

Why does hier come before the object? In English, "here" usually goes at the end of the sentence.

German is very strict about keeping the conjugated verb in the second position (haben), but it places other details a bit differently than English. A general rule is that short adverbs of time or place, like hier (here), usually sit right after the verb and before the direct object (keine Kamera). Remembering the literal translation "We have here no camera" will help you get used to this pattern!