Parallel lines can be projected either as parallel or as converging lines on a 2 dimensional photograph. As converging lines they are considered a distortion of the reality, nevertheless they can be useful to give the illusion of depth. It is your choice as a photographer to represent those lines parallel or not, and this article explains how to control it.
It is common knowledge among photographers that the Depth of Field increases when the aperture decreases, but by how much ? Unfortunately there is no simple relationship between the DoF and the aperture, but this article provides a accurate and simple answer to the question.
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A DSLR camera provides the option to fire the flash on the 1st or 2nd/rear curtain, which can produces different photographs in the same conditions. This article explains what it means, and how to use it.
The series of pictures below shows a tennis ball falling down, captured with different settings of flash and ambient light. It put in evidence the influence of setting the flash on the 1st or 2nd curtain.
The rest of the article also explains what are 1st and 2nd curtains, and provides recommendation on which setting is better.
The Depth of Field (DoF) increases with the distance to the subject, and even becomes infinite beyond a certain distance, which is called the hyperfocal distance. This article tells you everything you need to know about it…
Portrait Photographer based in Eindhoven, the Netherlands. 