Exercise: Focus at different apertures (TAoP)

Objective: To demonstrate how aperture affects the depth of field. 

For this exercise I have to focus on one spot within the frame, but change the aperture settings. I focused on the middle area of the image (mainly the fret board). My aperture range is between f5.6 to f22. I stayed with the same subject as before (my guitar) but included a bit more detail to each frame as a way of measuring how much comes into focus and at what aperture.The idea of the exercise is to demonstrate that a wide aperture of f5.6 will have a shallow depth of field, whilst an aperture of f22 should have depth ranging from front to back in the image.

I shot 4 images at f5.6, f7, f13 and f22. These settings were the best in order to highlight my results.


This image taken at f5.6 has a very blurred overall feel, with only the middle of the fret board in focus.


At f7 the guitar body is much more focused and you can start to distinguish more detail in the background i.e. a cable running up behind the left curtain and a small black spot under the window frame.


At f13 there is a significant difference. The folds in the curtains and the cable are becoming much sharper, and the black spot is more noticable. The guitar is in full focus.


The final image at f22 is in full focus. The curtain folds are sharp and detailed. I feel that the reflection in the window on all images is distracting and blurry. However, i was reluctant to crop this out as i wanted to include the folds in the curtains. This was a result of not using a tripod for the last pictures in particular as the shutter speed was significantly decreased. I would like to re do these shots when my new tripod arrives 🙂

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