Based on the short story "Camera Obscura" by Basil Copper. This story was first published in the Herbert van Thal anthology The Sixth Pan Book of Horror Stories (1965).

Host: We branch out a bit this evening and move a few feet away from the usual and get into the area of photography. Now, this painting here had best be viewed in a dark room, because it conjures up the ghostly, the ghastly, and the ghoulish. It tells the story about a very remarkable device that offers up a vision as things are, and a hellish vision of what they were and shall be. Our painting is called Camera Obscura.

Gingold: That may be business, Mr. Sharsted, but it is a far cry from humanity.
William Sharsted: Humanity, Mr. Gingold, applies to funeral eulogies and Valentine cards, not business.

William Sharsted: My father was a most successful man.
Gingold: At the art of backing people into a corner of despair, he was without peer.

William Sharsted: Gingold! Gingold! I don't belong here, I swear to you! these aren't my kind. These are ghouls and graverobbers! Bloodsuckers and usurers! I don't belong here! Gingold! Gingold!
Gingold: You're wrong, Mr. Sharsted. You're in your element.
William Sharsted: I'll reform!
Gingold: With your colleagues and your peers. Damned and doomed for an eternity of the leech.
William Sharsted: Never mind the 300 pounds.
Gingold: Oh no, Mr. Sharsted, too late for reprieve. Now you shall stumble and weep and swear along the alleys and squares and streets of your own private Hell!
William Sharsted: I'll reform! I'll change! Gingold! I'll change!
Gingold: And you shall do for all eternity.