Showing posts with label wax crayons. Show all posts
Showing posts with label wax crayons. Show all posts

Monday, January 07, 2013

Tablets, light tables and wax crayons

click photo to enlarge
When I was young a comic that I bought often featured a quiz. One of the popular categories consisted of photographs or drawings of everyday objects seen from unusual angles. A ball point pen, for example, might be shown from a viewpoint where the tip pointed directly at you and would consist of a hexagon enclosing a large circle with a couple of smaller concentric circles inside. A teapot seen from directly above would be a large circle (the body) with two smaller circles within it (the lid and the central lid handle), and a couple of bars projecting from opposite sides (the spout and the handle). You get the idea. I recall competing against friends to see who could draw a commonly found object in such a way that its identity couldn't be guessed. Simple pleasures, happy days!

We have in our house, at the moment, a new, clear plastic tub of short, wide, wax crayons. They are for some young children to use. When I looked at the tub from above the other day I was reminded of that childhood game and an idea for a photograph popped into my mind. A photograph from directly above might have colour, shape and interest if I lit it imaginatively. And with that thought, particularly the word "imaginatively", I made a connection with something I'd been pondering for a while. We have an Android tablet and it had occurred to me recently that it would make a useful light table for photographing small objects. The problem was I didn't know how to make it display a completely white screen. However, that little problem was solved in a eureka moment when I realised that if I opened a PDF and turned to a blank page I'd have just what I wanted. There must be a more elegant solution to that problem but I was entirely happy with my easy-to-realise answer.

So, here is the resulting photograph. It was taken quickly, hand-held. It's not the best macro shot I've ever done, but is a useful forerunner and test for what I hope will be better images using the tablet as a light table.

photograph and text © Tony Boughen

Camera: Canon
Mode: Aperture Priority
Focal Length: 100mm macro
F No: f6.3
Shutter Speed: 80 sec
ISO: 1250
Exposure Compensation:  -0.33 EV
Image Stabilisation: On