question about Lumiquest 80-20

windozewindoze Registered Users Posts: 2,830 Major grins
edited November 12, 2005 in Technique
when u use the system, you generally lose "stops" - correct? So what does that mean in terms of picture quality and knowing that you're going to lose stops suggests that you should do what???


troy

Comments

  • AndyAndy Registered Users Posts: 50,016 Major grins
    edited November 11, 2005
    windoze wrote:
    when u use the system, you generally lose "stops" - correct? So what does that mean in terms of picture quality and knowing that you're going to lose stops suggests that you should do what???


    troy


    Info on the Lumiquest 80-20.
    If the photographer can enlarge the light source and have it coming from a more natural direction, it will be a significant improvement over direct flash. All of our bounce and diffusion devices enlarge the light source and, at least to some degree, move it farther from the camera. Our 80-20 incorporates ceiling bounce into the process by bouncing 80% of the light off the ceiling which becomes a new, larger light source coming from a more natural direction. The 20% fill is then directed back into the subject to help fill shadows cast by the ceiling bounce. Obviously it would be pointless to use the 80-20 without a ceiling since 80% of the light would be lost rather than bounced back into the frame.

    Read the FAQ, Troy - and you'll see that if you put your camera in P mode using ETTL-2 on your flash, you'll be fine - the camera's metering will still work automatically. Only worry about "stops of light lost" if you are shooting in manual mode on the camera manual mode on the flash.

    Websites are your friend, Troy lol3.gif
  • TOF guyTOF guy Registered Users Posts: 74 Big grins
    edited November 12, 2005
    windoze wrote:
    when u use the system, you generally lose "stops" - correct?
    Any way of diffusing the flash light has a cost.
    windoze wrote:
    So what does that mean in terms of picture quality and knowing that you're going to lose stops suggests that you should do what???
    That means that the flash system GN number is less. A possible consequence is that you may have to increase ISO.

    Thierry
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