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L308S Meter - values resetting

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    mwoods
    mwoods  10 United Kingdom
    18 May 2014 - 11:30 PM

    I'm new to using a lightmeter - when I take a reading in wireless flash mode I'd like to shift the values up and down as you can in ambient mode; i.e. press up and down until I get the aperture I want to use.

    When I press up or down the f-stop value resets.

    Am I missing something? What am I doing wrong, please?

    I can control the aperture with the flash output but want to adjust using the current output.

    I hope that made sense! Any experienced advice greatfully accepted!!

    Regards, Mark.

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    Snapper
    Snapper  93742 forum posts United States Minor Outlying Islands3 Constructive Critique Points
    19 May 2014 - 12:28 AM

    I'm not entirely sure I understand the question, but here goes anyway. The big thing on flash measurement is setting the shutter speed to ensure you are syncing correctly, and then the meter will tell you what aperture you need to set for a correctly exposed shot. In order to change the aperture you generally want to change the amount of light hitting the subject, and that normally involves changing the flash output. You seem to get that from your second last line, but it really is all down to the amount of light in order to change the aperture. If you want a smaller aperture to limit dof you can always fit an ND filter if you don't want to change the flash output.

    There may be another explanation I'm not aware of, so maybe someone else will come along and help.

    mwoods
    mwoods  10 United Kingdom
    19 May 2014 - 2:29 PM

    Thanks, Snapper, but my question is about the meter itself. I take a reading but when I press up or down to see the reading to see that exposure as a different shutter speed and aperture (as you can in ambient mode) the reading simply resets to zero.

    oldblokeh
    oldblokeh  3796 forum posts United Kingdom
    19 May 2014 - 3:41 PM

    That's the way it works. It says in the manual (with respect to flash metering):


    Quote: After measuring, if the shutter speed is changed, the
    measurement value (aperture value) will revert to zero. In such
    cases please measure again.
    If ISO film speed is altered after measuring, a calculated value
    (aperture value) will be displayed.

    It's only likely to make a difference if ambient light represents an appreciable fraction of total illumination, I think.

    mwoods
    mwoods  10 United Kingdom
    19 May 2014 - 5:55 PM

    Ah, brilliant, oldblokeh! Thanks - exactly what I was looking for!!

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