Plural of "camera obscura"
From wiktionary :
Etymology
New Latin, from camera, chamber, + obscura, dark.
Noun
camera obscura (plural camera obscuras)
You can find example of usage in wikipedia page :
Most practical camera obscuras use a lens rather than a pinhole (as in a pinhole camera) because it allows a larger aperture, giving a usable brightness while maintaining focus.
This is a book in references :
- Smith, Roger. "A Look Into Camera Obscuras". Retrieved 2014-10-23.
There is a website :
Cameraobscuras.com George T Keene builds custom camera obscuras like the Griffith Observatory CO in Los Angeles.
And this is also a category : Camera_obscuras
The funny part is that camera in english came from this.
Your immediate reaction probably arises from other phrases such as court martial and inspector general. The difference is that these phrases are derived from French, and already have plurals associated with them (courts martial and inspectors general). The term camera obscura seems to have originated with Kepler in 1604, and the term spread as a fixed phrase. As a result, in English the plural is formed by simply adding an s to the final word: camera obscuras.