With the Athens airport not too far away, relatively speaking, seeing air traffic overhead happens quite often at work. I grabbed the camera and decided to see how good this 35x optical zoom on my new Canon SX40 HS camera actually is.
I quickly discovered that at that level of zoom, it's quite challenging even to follow a moving object, let alone actually get a picture of it.
But even at full 140x zoom, (35x optical and 4x digital), the outline of an airplane is clearly visible.
Unfortunately, adding digital zoom makes the picture somewhat unstable.