Exercise 8: Your Camera's Dynamic Range

This exercise is one that I put off attempting for quite a while because of how complex it is and due to the fact that I saw little benefit in completing it. I produced a set up similar to the one described in the text, set the exposure compensation to +0.5, the point at which the camera's highlight warning began to show. I then took spot meter readings from the highlight area (represented by the white A3 drawing pad in the centre of the frame) and shadow area (the area inside the house.) The readings I got were 1/1000 @ f16 for the highlight area and 1/125@f5.6 for the shadows. Using a dynamic range calculator I found through an internet search.

I arrived at a difference of 6 stops between the shadow and highlight area - about half the dynamic range I had been led to believe my camera was capable of through various tests I had read! A quick examination of the image in Lightroom however showed that I should have taken a meter reading for the shadows from the area underneath the children's sand table at the front left of the image. This shows the inherent flaw in this exercise - it is an attempt to be quite scientific in analysing dynamic range and yet provides too many variables to give accurate data. My understanding of dynamic range comes purely from using my camera in different situations and gaining an idea of how it will behave. At the same time I need to decide which elements are most important in the frame and whether my cameras metering will be fooled into under or over exposing - I have learned that the eyes can often fool you into how light or dark a scene is and to use the histogram to judge whether a full range of tones will be recorded. Completing this exercise has done nothing to further my knowledge in this area, maybe this is because I am already familiar with the way my camera operates. I doubt whether I would attempt a repeat of this exercise with a new camera - I would probably experiment with how the it behaves in real situations to understand its strengths and limitations.