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Thread: Manual control or Automatic for Canon Speedlite 430 EX II

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    Ausphotography Regular David's Avatar
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    Manual control or Automatic for Canon Speedlite 430 EX II

    I have a question relating to my Canon 400D and the new speedlite 430 EX II I recently acquired.

    According to the Canon 400D Manual there is is customer function (page 105) called

    Custom Function C. Fn8 for E- TTL II

    The 2 options are

    0: Evaluative : This provides fully automatic flash photography in all light conditions including automatic exposure compensation. The camera is integrated with the Speedlite and all you do with the Speedlite is turn the thing on, thats it, apparently.

    1: Average: Geared for users who want to control the Speedlite. It averages the entire flash metering area (as opposed to what ?). Also in this custom mode the camera will not execute automatic Exposure Compensation, so it may need to be adjusted.

    QUESTIONS

    A. What does the evaluative mode measure for flash exposure if not the entire flash metering areas (option 1) ?

    B. Do I have to have this custom function set to 1 not 0 to be able to manually manipulate the settings etc on the Speedlite ?

    C. What are the advantages (if any) of having 'control over the speedlite' ? cf just leaving it as it is, automated via the camera ?


    I guess the simple answer for a newbie to all this would be leave it in the default mode (0) and get more experience before you try going away from the automatic Speedlite via camera controls option, then think about changing to self control of the speedlite and manual setting/manipulations when you know more about Strobism.


    If I did switch to the control the Speedlite option, I dont mind having to adjust the Exposure Compensation and have actioned a custom function that gets me direct quick access to EC by simply pushing the SET button after the shot if necessary to adjust the EC for the next shot. Im getting my head around FEL thingo too.

    Comments and suggestions most welcome from anyone with more than my level of Strobism experience, which would be 0.
    Comments and CC welcome..

    Gear: Canon 6D & 1Ds Cameras l Canon EF 17-40mm F 4.0 L USM l Canon EF 24-105mm F4.0 L IS USM l Canon EF 70 - 200 F4.0 L USM Lenses I Manfrotto Tripods I Adobe Photoshop CS6 l Lightroom 3.0 I Lee Filters



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    I cant help as yet on the questions but I'll be watching this since I just got one also
    Cat (aka Cathy) - Another Canon user - 400D, 18-55,75-300mm Kit Lens,50mm f1.8, Tamron 90mm f2.8 Macro, Sigma 28-70 f2.8-4 DG, Tripod and a willingness to learn
    Software used: PhotoImpact, Irfanview and a lot of plugins
    We don't make a photograph just with a camera, we bring to the act of photography all the books we have read, the movies we have seen, the music we have heard, the people we have loved. - Ansel Adams


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    Member lloydy's Avatar
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    Really complex stuff... and lots more to know, believe me... I found a really great article on the Canon EOS flash system that explains how this all works in easy to understand terms.

    see here

    http://photonotes.org/articles/eos-flash/

    hope this helps
    Pete
    Canon EOS1000, Canon 300D plus crappy kit lenses, Canon 40D, Canon 5dMkII
    Sigma 12-24mm F4.5-5.6 EX DG, Sigma 24-70mm f/2.8 EX DG HSM, Canon 24-105 EF f/4L IS USM
    Canon 50mm EF f1.2/L USM, Sigma 150mm F2.8 EX APO Macro DG, Canon 70-300 EF f/4.5-5.6 DO IS USM

    all shared with my lovely wife (except for the 5DMKII)

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    Quote Originally Posted by lloydy View Post
    Really complex stuff... and lots more to know, believe me... I found a really great article on the Canon EOS flash system that explains how this all works in easy to understand terms.

    see here

    http://photonotes.org/articles/eos-flash/

    hope this helps
    Pete
    Thanks Pete for the great link: Looks like Ive got some serious homework to do now

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    Member Dawixe's Avatar
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    Nice..... been looking into this for ages. Thanks

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    Average averages the scene when the camera meters

    Evaluative uses a complex algorithm to do the metering

    The biggest difference i have seen is that basically average will give you more predictable results, whereas Evaluative will strongly bias towards underexposure when there is a bright object close to you (e.g. if you are photographing a group of people from one end of a restaurant table with white cloth, the white cloth will cause the camera to underexpose the flash exposure under evaluative, whereas it will be blown out in average metering)

    If you ride your FEC when using Evaluative you should be fine, but otherwise Average is decent but make sure you use RAW so you can rescue the inevitable over exposures

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    Thanks Pollen: Im very very new to flash light work and have sooo much to learn.

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