Friday, 14 May 2010
Exercise: Focal lengths and different viewpoints
This first image of the sundial on the Front Lawn of our garden was taken with the lens set to 144mm
For the second image I set the lens to its widest setting and moved closer to the sundial until the subject was framed as close as possible to the original image, shown in Figure 1 above.
A couple of observations of differences between the two images can be seen, the first is around the distortion of the subject in the second image, with the base of the sundial appearing to slope towards the bottom of the base, while in the original image, the subject is seen with the base have almost vertical lines.
Also, in the first image, the subject is somewhat isolated from the background, with the background out of focus. The second image shows the background much sharper, even though the image was taken with a wider aperture, f3.5 for Figure 2, compared with f5.6 for Figure 1.
This isolation from the background gives the image a much softer feel than the overall sharper background in the second image