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Thread: On-body AF assist lamp

  1. #1

    Default On-body AF assist lamp

    Hi, Lens with a large diameter can block the AF assist lamp built at front side of the camera body. Can the camera therefore lock the focus on the subject in this case where the lighting condition is dim or low. Is this considered as one of the "cons" of the camera. An alternative is to use an external flash on the hot shoe.
    Last edited by henry soh; 24th November 2010 at 10:01 PM.

  2. #2

    Default Re: On-body AF assist lamp

    Quote Originally Posted by henry soh View Post
    Hi, Lens with a large diameter can block the AF assist lamp built at front side of the camera body. Can the camera therefore lock the focus on the subject in this case where the lighting condition is dim or low. Is this considered as one of the "cons" of the camera. An alternative is to use an external flash on the hot shoe.
    Depends on the camera. On my Sony bodies, no issues so far, even in really dim light.

    Having an AF assist lamp in the first place is already considered good.
    Alpha

  3. #3
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    Default Re: On-body AF assist lamp

    Quote Originally Posted by henry soh View Post
    Hi, Lens with a large diameter can block the AF assist lamp built at front side of the camera body. Can the camera therefore lock the focus on the subject in this case where the lighting condition is dim or low. Is this considered as one of the "cons" of the camera. An alternative is to use an external flash on the hot shoe.
    If you are asking whether having an AF assist lamp is good even though there may be times when it cannot be used due to a monster lens in front, then it is "yes". Simply because there will still be times when the monster lens is not in use and you need to the AF assist.

    Note, however, the AF lamp has a limited range.

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    Default Re: On-body AF assist lamp

    Quote Originally Posted by henry soh View Post
    Hi, Lens with a large diameter can block the AF assist lamp built at front side of the camera body. Can the camera therefore lock the focus on the subject in this case where the lighting condition is dim or low. Is this considered as one of the "cons" of the camera. An alternative is to use an external flash on the hot shoe.
    I using a 18-200 and it does block around 50% of the AF assist lamp. But still sufficient enough to help the camera focus using the centre focusing point.

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