Philip Bladon of Redditch puts this question. He also asks which local authority is most supportive of metrication. The editors of Metric Views, however, have doubts about whether this would be a useful line of enquiry, and invite comment from readers.
Category: Consumer affairs
Would lined beer glasses solve the pint problem?
It is sometimes claimed by opponents of the metric system that any interference with “the British working man’s pint” would spell political death for any party that dared to touch it. Leaving aside the sexist assumptions behind the claim, let us examine whether there is a practical solution that need not be controversial.
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Are imperial units natural? (and some useful rules of thumb)
One of the claims sometimes made by defenders of imperial weights and measures is that they are “natural”. The metric system (they may say) is all very well for science and technical matters, but for everyday life imperial units like the foot conform to the human scale and are more “natural”, unlike the arbitrary metric unit, the metre. We examine this argument.
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What’s wrong with two systems?
Defenders of imperial units sometimes claim that using units from different systems simply contributes to the richness of our language and culture. People use whichever units are appropriate to the context (they argue).
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The Four Thirds system
In response to a misconception voiced in another article, https://metricviews.uk/2007/08/28/photo-paper-sizes/#comment-312, it may surprise some readers to learn that the image sensors in Four Thirds digital cameras do not have a diagonal size of four thirds of an inch.
[Article by Martin Ward]
The naming of the Four Thirds camera system is a good example of a practice that is often used when a manufacturer wants to hide the true size of a product from the consumer. Namely, an obscure or deceptive imperial measuring convention is used instead of the original metric design size. The image sensors in Four Thirds cameras are actually 18 mm x 13.5 mm (22.5 mm diagonal), with an imaging area of 17.3 mm x 13.0 mm (21.6 mm diagonal) – quite a lot smaller than a diagonal size of four-thirds of an inch (33.9 mm), and significantly smaller than the 22.5 x 15.0 mm and 23.6 mm x 15.8 mm sensors used in the equivalent cameras of competitors Canon and Nikon.
The practice of describing image sensors in this deceptive manner continues from the days when all image sensors consisted of vacuum tubes and were described by the physical diameter of the glass tube, which was always larger than the “diameter” of the image sensor inside. Thus the imaging area of a Four Thirds camera sensor (17.3 mm x 13 mm) is the same as the imaging area of a hypothetical vacuum image-sensing tube of 4/3 inch diameter.
As with LCD and plasma TVs, technology has changed beyond the point where it makes any sense to continue using the old measuring conventions. It would be far more useful to modern consumers to describe the sizes of TV screens and camera image sensors in terms of width x height in standard metric units, than in terms of the diameters of hypothetical vacuum tubes, especially when these products now come in different aspect ratios. But, as is often the case, the needs of consumers do not always coincide with those of the marketing departments of manufacturers.
Further information on the Four Thirds system can be found at https://www.four-thirds.org/en/
No return to pounds and ounces
Today’s announcement by the European Commission that it is to propose that “supplementary indications” (such as lbs and oz) should be allowed indefinitely does NOT mean that traders can go back to weighing and pricing in imperial measures – so says the UK Metric Association (UKMA). [Press release issued on 11 September.]
Why are photo paper sizes imperial?
A correspondent recently complained that a university quoted photographic paper sizes to him in imperial units. This reminded me of an unpleasant discovery I made some years ago. Continue reading “Why are photo paper sizes imperial?”
Symbols understood by everyone, everywhere (unlike abbreviations)
Do British road signs have symbols on them or abbreviations? (Martin Vlietstra asks a rhetorical question).
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Tesco – trying hard but must try harder
On Saturday 21 July 2007, I visited a Tesco store in the West Midlands. On many of the fruit and vegetable displays there were signs showing the inkorrect symbol ‘Kg’. (Article contributed by Philip Bladon, author of ‘A Dictionary of International Units’)
Overheard in the deli
Overheard at the deli counter in a Sainsbury’s in Sussex (reported by Roz Denny). Continue reading “Overheard in the deli”
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