This is an inferior approach to UV photography. To be honest I've been reticent to post this. However someone may find a use for this.

And for the sake of disclosure I was inspired by this gentleman's work. The "softness" of the image adds an ethereal quality I like.

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Step 1: Equipment

You will need

An Ultraviolet irradiator, I used my FOD but a compact fluorescent blacklight in a reflector should work also.

A target holder, I used a pair of helping hands.

A convex lens, mine was sourced from a pair of binoculars.
and mount

A measuring stick

A fluorescent screen.

A dark room (by which I mean a room you can make dark)


A target ( preferable one which shows strong disparity in appearance under UV irradiation compared to visible light, so as to prevent DIGGer's from dying of apoplexy when you do something they're convinced can't be done.) In this case a yellow lantana.

Step 2: First find the focal length of your lens

You'll need a light source, a measuring tape, the lens and a screen, for right now a piece of paper makes an adequate screen.

Lay the tape out on a flat surface and place the screen at the zero point. Then place the lens at 2N on the tape (with N being any reasonable number to start, say 2 inches) and the light source at 4N. Now slowly move the lens and the light source away from the screen, while keeping the distance ratio the same, until the light source is in focus on the screen. At this point the lens focal length is equal to N.

I assume this is a valid approach since 1/u+1/v=1/f The basic simple lens calculation. Sorry no image, but you can do this empirically as well.
vishalapr3 years ago
Amazing!!!!!!!!!!!!!!!Absolute fantastic!!!!!!!!!!!!!!!!!
Could you compare glow in the dark paint with color-safe bleach or "brightening" laundry detergent as the fluorescing material?
royalestel8 years ago
That's a brilliant idea. Use fluorescent paint's ability to convert UV light to the visible spectrum. Aww-sizzum. Thanks for the idear, mate.