Our next photo challenge was depth of field. In contrast to the first week, Selective Focus, week four was “Tack Sharp.” Here again, once you understand the relationship between ISO, aperture, and shutter speed, composing photographs that emphasize different artistic elements is easier. This week’s challenge was to compose a photograph using a very small aperture, so that there is deep depth of field, which Ricky described as “tack sharp,” a term I had not heard before.
I had been using relatively slow film (ISO 100), large f-stop (small aperture) and slow shutter speed (1/60 sec or slower), plus a tripod for slower shutter speeds, for decades before this challenge. This combination gives clear (not grainy), sharp (everything is in focus) images of landscapes or still lifes. The question was, what to shoot? There was not a lot of guidance on what the photograph ought to contain, whether the subjects should be large or small, whether the image should contain objects that were close together or far apart, etc.
I tried one with river rocks by our pool deck
That one didn’t do it for me.
I tried one with large rocks near a stream
That one didn’t do it either.
I was driving along a Farm-Market road north of Sherman (Texas) when I saw these sheds. I went back the next morning (so as to get the early, golden light). This one did it!