Converting Colour to Black and White

You may just take all colour from your colour images. That is called desaturation. That means that each pixel gets converted into a grey pixel with the same luminosity that the colour pixel had before.

That is more or less what classic black and white photographers used to do. They just used some b&w film in their camera. However, that was often way to boring even for b&w photographers. That is why they used colour filters like red and green, which are called B&W filters although they are coloured.

ISO-Values of a Canon 7D from 100 to 12800

A comparison of the automatic lighting optimization (ALC) and the highlight tone priority (HTP) and their impact on the iso noise.

For this test scenario I chose some motive with lots of rather homogenous dark surfaces because those are most likely to expose the noise. 

There is one picture for each ISO level that corresponds to full E.V. levels, such as 100, 200, 400 and so on.

When HTP (D+) is enabled then the available ISO values range from 200 to 6400 (no 100, no H = 12800). With HTP enabled ALC is always off.

Gegenüberstellung 100, 400, 3200 und 12800 ASA


From Mass Media to Art Works

It is told that the transfer technique was discovered reather erroreous just by some sloppy worrk within the Polaroid laboratoires. Now the idea of producing unique litle piecies of art has become quite fashionate.


Polaroid Emulsion Lift

5 DM Polaroid Transfer

Polaroid is dead.

Long live Polaroid.










1 Polaroid-Image, or more
2 Bowls for water
1 Electric kettle
1 new media (e.g. water colour paper)
1 plastic spoon

A Tutorial for Digital Infrared Photography

Tübingen Beyond Red

In this brief tutorial you will learn the basic steps from the image out of the camera to this final with a couple of mouse clics using free software only.

Out of the camera infrared image