Volume 1, Issue 5 (May 2004)

    Seeing and Photographing Your Visual Observations

    (Received 21 August 2002; accepted 17 September 2003)

    Published Online: 2004

    CODEN: JAIOAD

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    Abstract

    Light can play tricks on your eyes. Deficiencies that are observable at 1:00 PM are not necessarily observable at 3:00 PM. Depending on the nature of the light, sunlight vs. daylight, an inspector may or may not observe a bowing stone panel. Depending on the building facade material, configuration, or texture, light may or may not illuminate a facade deficiency. Ornate facades cast shadows in sunlight. A crack or spall can be lurking in those shadows. The inspector's choice of binoculars, experience, and possibly his psychological disposition may influence whether or not he observes an existing facade deficiency. Recognizing the deficiency may truly be a challenge, but photographing the deficiency may be a greater challenge. The crack or spall that lurks in the shadow on a sunny day may be nearly impossible to photograph. Excessive sunlight that reflects off the facade may wash out a photograph. Automatic cameras typically grab all surrounding light for a photograph, but this may be too much or too little depending upon the item to be photographed within the frame. The ability to set your camera manually may be necessary. This paper discusses the nature of light and suggestions for observing building facades and for recording deficiencies.


    Author Information:

    Petermann, MA
    Consultant, Wiss, Janney, Elstner Associates, Inc., New York, NY


    Stock #: JAI11161

    ISSN: 1546-962X

    DOI: 10.1520/JAI11161

    ASTM International is a member of CrossRef.

    Author
    Title Seeing and Photographing Your Visual Observations
    Symposium Building Facade Maintenance, Repair, and Inspection, 2002-10-13
    Committee E06