Monday Non-Combat Magical Item - Picturebox

I've been reading The Colour of Magic from the Discworld series by Terry Pratchett (it's amazing and I highly recommend it). That has inspired today's Non-Combat Magical Item, the Picturebox.

Picturebox

Wondrous item, uncommon

The Picturebox is quite an amazing invention. It consists of a small hollow wooden cube, with a glass lense in the front, as well as a viewport for viewing. There is a small door in the back of it. The device is used to create still pictures, in as little as one minute.

A small imp is summoned and bound to each picturebox. Only imps of the highest artistic ability are used. The imp lives inside the picturebox, having all of the comforts of home, (stone slab for sleeping, gruel for eating, high-quality canvas and paints). When the user of the picturebox wants to capture a moment for posterity, they simply point the picturebox at the target, being careful to not obstruct the lense and therefore the view of the imp, press the button, and hold the box as steady as they can for one minute. The skilled imp quickly paints a portrait of what he can see, the portrait is of the hyper-realistic style that is popular in the lower planes. Painting imps will only paint what they can see, so they do not take any critiques on style, or attempt anything abstract.

The picture is then handed to the user out the back door of the picturebox. The picture is a standard 6-inch square. It is customary, but not required, to give the imp a short coffee break before taking another picture.