Can a lux meter be used as a photographic light meter?

Discussion in 'Photography' started by anon, Nov 27, 2006.

  1. anon

    anon Guest

    Is there a formula I can use to use a lux meter reading to figure out
    fstops OR shutter speed? If there is please give me a link or web page
    I can read up on.

    Or do I have the wrong type of meter entirely?

    It looks like the one in the pic. I understand that things will depend
    on the (film speed + fstop) OR (film speed + shutter speed). I am just
    looking for something to get me moving in the right direction. It model
    is ISO-Tech ILM350 I got it at a swap meet and saw "ISO" on the unit so
    I thought it would work as a light meter even if I am not too sure how
    it works just yet.

    To see a picture of a lux meter similar to what I have, click the link.
    It will also show you how to contact me. Reply through the backpage ad
    listed below or directly on this newsgroup. Please don't use the email
    from this post, it was killed by spam. I used a short-link redirect
    since the post link is kind of long.

    http://xrl.us/tg9n (Link to sanantonio.backpage.com)

    Thank you.
     
    anon, Nov 27, 2006
    #1
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  2. anon

    Whiskers Guest

    On 2006-11-27, anon <> wrote:
    > Is there a formula I can use to use a lux meter reading to figure out
    > fstops OR shutter speed? If there is please give me a link or web page
    > I can read up on.


    I haven't read this group for a while, so I apologise to all concerned if
    this question has already been dealt with or abandonned.

    This page explains the basics of 'illumination', 'luminance', and
    photographic exposure
    <http://johnlind.tripod.com/science/scienceexposure.html>.

    > Or do I have the wrong type of meter entirely?


    I would say, almost certainly the wrong sort of meter for photographic
    use.

    snip

    > http://xrl.us/tg9n (Link to sanantonio.backpage.com)
    >
    > Thank you.


    A normal photographic light meter will have some means of rapidly
    calculating the film-speed, shutter-speed, and lens aperture, combinations
    for photographic exposure purposes - based on an 'integrated' reading of
    either all the light being reflected from the scene ("reflected light
    meter") or of the light falling upon it ("incident light meter"), or will
    read the light reflected from a tiny portion of the subject from which the
    exposure calculation also takes account of the colour and 'brightness'
    rendering required for that part of the image ("spot meter").

    Each type has its uses, and many models can function as both "incident"
    and "reflected" meters, and a few as a "spot meter" too although the best
    spot meters are purpose-built for that task. Then there are meters
    designed for use with flash-lit studio set-ups, and others for use in the
    dark-room. Whichever type you use, the readings need to be be
    "interpreted" by the photographer, to get the best results.

    Through-the-lens metering built into cameras is a whole different thing,
    but essentially works as a reflected light meter or as a lot of
    spot-meters or as something in between.

    --
    -- ^^^^^^^^^^
    -- Whiskers
    -- ~~~~~~~~~~
     
    Whiskers, Dec 9, 2006
    #2
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  3. anon

    anon Guest

    Thanks,
    I had a feeling that the lux meter was (mostly) all wrong for what I
    wanted-- a photographic light meter. You kind of confirmed it.

    I only paid 5$ for it so I don't feel too bad. When I bought it I
    thought it was curious that id did not have a dial for the fstop or
    speed. What really threw me off was that the name of the damn thing is
    "ISO-tech"!

    No matter. I can still play with it and I could use it as a supplement
    to what I already have. Thanks for the link. I will look it over and
    mess w/ the math.
     
    anon, Dec 10, 2006
    #3
  4. anon

    Whiskers Guest

    On 2006-12-10, anon <> wrote:
    > Thanks,
    > I had a feeling that the lux meter was (mostly) all wrong for what I
    > wanted-- a photographic light meter. You kind of confirmed it.
    >
    > I only paid 5$ for it so I don't feel too bad. When I bought it I
    > thought it was curious that id did not have a dial for the fstop or
    > speed. What really threw me off was that the name of the damn thing is
    > "ISO-tech"!
    >
    > No matter. I can still play with it and I could use it as a supplement
    > to what I already have. Thanks for the link. I will look it over and
    > mess w/ the math.


    At least you'll end up knowing more about exposure than most photographers
    do :))

    --
    -- ^^^^^^^^^^
    -- Whiskers
    -- ~~~~~~~~~~
     
    Whiskers, Dec 10, 2006
    #4
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