Linear or Circular Polariser?

In the early days of the polarising filter there was just one type – the linear polarizer.  The circular type arrived when the cameras with advanced metering (and later focusing) systems became popular. The Canon T90 and Olympus OM4 both had new advanced TTL metering that would be affected by the way a linear polarising …

Polarizing Filter and cross polarization

If you have a computer with an LCD monitor and a camera with a polarizing filter on the lens you can create some really colourful photos like this: All you do is place a piece of plastic (the above is a cd case with ice on the surface) in front of an LCD screen and …