Taking readings this way lets you set your exposure based on your subject not the background.
F stop light meter.
They usually have a number of modes including reading light that is reflected from a subject light that falls on a subject or scene incident light and the light.
It is done according to a defined scale.
Whereas the incident meter measures the exact power of the light source providing a better reading.
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This is because the f stop numbers come from an equation used to work out the size of the aperture from the focal length of the lens.
1 i have the meter in auto reset cordless flash mode i e.
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I have a stupid question regarding light meters specifically the sekonic 758dr.
You can increase your aperture buy one stop from f 5 6 to f 4 0.
By this you are allowing 50 less light through the lens 1 f stop.
Depending on your needs you will either have to choose a camera light meter that s able to measure one of those two types of light or one that can do both if you are prepared to accept a higher asking price.
Handheld light meters measure the quality of light in a scene and then break down the results into measurements photographers can use i e.
The method of taking a reading most of the photography light meters can measure two different types of light.
The lightning bolt 2 set the iso 1 to iso 100.
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In doing so you re halving the open area of the aperture in the lens.
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The sekonic l 398a light meter studio deluxe iii 401 399 is an ideal light meter for those who are doing still photography.
In this case reflected metering isn t exactly accurate and you d overexpose other segments of your image if you used that reading to set your f stop.
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The iso range on the meter is 6 to 12 000 with 1 3 step increments and thanks to the amorphous photocell there is no need to worry about using and charging a battery.
You now want to add a stop of light because your cameras meter says you are underexposed by one stop.
Sophisticated handheld photo light meters can gauge intensity down to tenths of an f stop allowing for precise readings.
I am following these steps.
The point is that you can increase or decrease exposure by making the aperture larger or smaller.
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Again refer to the chart above.
If you are changing from f 2 to f 2 8 you are halving the exposure.
I am using this meter to set the f stop and light ratios in a home studio setup 2 monolights and 2 flashes in manual mode.
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F stop shutter speed iso etc.
