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Gordon W | profile | all galleries >> Tips & Techniques Galleries >> F-stops tree view | thumbnails | slideshow

F-stops

In the olden days of film and much simpler cameras, it was easy to know when you were increasing or decreasing the shutter speed and/or aperture by one ‘stop’ because this was done by twisting a dial or knob that was labelled by full stops and often had detents at each stop as well - so a ‘stop’ usually really was a stop. ;-)

However, with digital cameras that only have a numeric readout it's not so obvious when one is changing exposure by a full stop or not.

So, if you ever wanted know what's a full, half, or third stop, below is a chart for you. Click on it for a more readable size.

The scale used for f stop settings starts with 1 (focal length = diameter of the lens opening).

Further illuminating reading on this and related topics, such as EV, can be found at these links...

F-numbers Explained
EV Compensation Explained
Table of F-stops
Table of F-stops