Looking at colour and exposure is important as they have a profound and interrelated effect. In this exercise the idea is to look at the range of variations in colour produced by using a varying exposure. As I shoot in RAW and use Lightroom as an editor I discovered that although I had used a variety of exposures the RAW editor had actually minimised the effect of this. I also found that my camera (if left to its own devices) also counteracted the varying exposure by altering the ISO to compensate. So - several tries later, ISO set to a fixed amount (100), f/5.6, and with varying exposure times I came up with this range. The actual picture is a fairly close up shot of a deep blue pottery vase.
|Original exposure - 1/60 sec.|
This is the original exposure and probably the best. There is a good range of deep colour here and it is fairly accurate to the actual vase.
|Decreased exposure - 1/125 sec|
This looks much darker off line and when printed. The colour is very dense and less detail is visible.
|Increased exposure - 1/30 sec|
Here the vase looks much lighter, it makes an interesting picture - but is less true to the original.
I also took 4 other intermediate exposure, the differences did not show well on line, but were definitely present.
- Varying exposure alters more than just the strength of the colour, It also effects what we perceive in the details.
- Controlling exposure needs more than thinking about the shutter speed.
- RAW editors do a lot of changes automatically!