Focus at different apertures

Although the exercise instructions said find a similar subject, I instead opted for a macro shoot using a Sony A57 at 400 ISO , a Walimex manual focus 85mm lens at its widest aperture f1.4; at f5.6 and at f22, coupled with a 36mm extension tube. Given the setup, the depth of field at all of these apertures was going to be small but it was however, recognisably different as the following shots illustrate:-

f1.4 @ 1/10 second


f5.6 @ 1.6 seconds


f22 @ 10 seconds


As can be seen the first shot only places a small area of the front and central brown square in focus; the second shot all of the square and the third nearly three squares deep in focus.

I also tried some further shots of the white pieces of the chess set:-

f1.4 @ 1/30 second


f5.6 @ 1 second


f22 @ 6 seconds


The Depth of Field here ranges from a very small area in front of the cross on top of the centre piece to three pieces. So as well as enabling more light (and thus faster shots – useful for indoor shots concerts etc) the use of varying apertures can be used creatively to create an image that the eye would not normally consciously be creating:-

Catkins at f2.8

Harbour Camera Sony DSLR-A900; Exposure 1/8000 sec; Aperture f/2.8; Focal Length 26 mm & ISO Speed 400


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