Travel Light with Gossen and Sekonic
You might think it superfluous these days to carry a hand-held light meter - what with all digital cameras containing their own light metering capability and never being wrong and always giving you perfect exposure every time. Oh, look, there's another flying unicorn...
Where was I? Ah, yes - the Gossen meter and the Sekonic meters. Got 'em both in stock and it looks like some people still use them...to check flash exposures before they light the fuses...to get the exposure right before the model stalks in and glares at them...to get accurate exposure even when the matrix-all-over -whatever-you-want-Boss meter in the camera insists on something that looks horrible.
They buy the small light models and take them in their shirt pockets when they go bush with the panoramic or large format cameras. They pop them out at weddings before the bride arrives to see if the church is dim enough...and there are churches here in Perth that do dim on an industrial basis. You can generally tell from their contact sheets or presentation sites that the exposures are dead on...without having to be shot 15 different times with an air of increasing desperation.
Of course, if you want to sit up until 2:00 AM recovering your exposure on the computer, please do. I'm going to use an exposure meter.