Jon Tarrant

Having looked at resolution figures quoted in line-pairs-per-millimetre and in cycles-per-pixel attention now turns to lines-per-picture, which is a measure that defines the maximum number of picture lines and therefore indicates the amount of detail that any picture can contain.

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Lens resolution figures have long been stated in line-pairs per millimetre but in the digital arena it is common to use cycles per pixel: what is the difference and how are these two resolution metrics related to each other?

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Compact System Cameras are, in many ways, the best of both worlds; they and small and yet also very versatile. But by the same token, Compact System Cameras may be viewed as being awkwardly cramped and poorly suited to some kinds of photography…

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The arrival of zoom lenses changed the way photographers approached their subjects. In the days of primes you had to move to another spot to change the composition but zoom lenses removed the need for that… or did they?

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Macro lenses come in a variety of different focal lengths but how do you choose the best focal length for any given macro situation?

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Numerical testing and visual sharpness are two very different things. Of the two, visual sharpness is probably more important but it is also harder to define.

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