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What do the T and v stand for?

Picture of Canon mode dial.
Public-domain image from Wikipedia.

37

Tv stands for "Time value". Similarly Av stands for "Aperture value".

Source: http://en.wikipedia.org/wiki/Shutter_priority

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  • Not that I don't appreciate your quick helpfulness, @Vikas. :) – Please Read My Profile May 23 '11 at 18:08
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    @mattdm +1 just for you buddy – rfusca May 24 '11 at 2:20
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    @rfusca: funny. But I'm serious that it's detrimental to the site to over-upvote trivial answers, because it causes the really great answers to be relatively undervalued as they get buried under quick things like this. – Please Read My Profile May 24 '11 at 3:15
  • Additionally, while I believe the answer to be correct, the linked source is actually quite poor, as it's merely an unsourced wikipedia article with nothing to back it. See dougkerr.net/Pumpkin/articles/APEX.pdf for a better one. – Please Read My Profile May 24 '11 at 3:17
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TV stands for Time Value. This is basically to indicate that you can set the Shutter Speed manually and the aperture will set automatically depending on the other parameters you've set like the exposure and the ISO. This mode is very handy in case of bird photography, sports photography or anything where shutter speed needs to be constant.

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  • I think time value is just poor translation . Speed value would be more to the point. Ken – Ken May 12 '17 at 22:11
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    @Ken I disagree. "Duration" would be better, as the value (i.e., 1/5 s, 1 s, etc) is in units of time, whereas speed is relative to unit of 1/time (i.e., Hz). – scottbb May 13 '17 at 1:33

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