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ISO 15781-2013 pdf free download
ISO 15781-2013 pdf free download.Photography Digital still cameras Measuring shooting time lag, shutter release time lag, shooting rate, and start-up time
Photographie — Cameras numériques — Déacalage dans le temps du mesurage de Ia prise, décalage dans le temps de I’ouverture de l’objectij cadence de prise et temps de démarrage.
However, in the case where the shooting image cannot be checked through an optical viewfinder, or if the initial setting of the product is “image display device on in the camera with both optical viewfinder and image display unit, the time between switching the power on and the moment the viewfinder image (through-image) is displayed shall be measured.
When using the internal measurement, suppliers as shown in informative Annex C shall directly observe appropriate signals, and the time defined in &U. shall be measured.
5.2.2 Shooting time lag
Prior to each measurement of the shooting time lag, the digital still camera shall be turned to lace a distant object and shall focus on this object. The elapsed time between turning the camera on the stand and pressing the exposure button shall be less than 3 s.
The distant object shall be located at a distance of at least 100 times the focal length of the camera lens, or 5 m, whichever is greater.
For products that allow manually focusing to infinity, this option may be used. The focus point can also be set to Infinity using a collimator.
The shooting time lag, TSL, shall be measured by turning the digital still camera to face the chart and by fully pressing the exposure button with continuous auto focus turned off. in the case of the external measurement, the time between starting the timing device and the first illuminated time indicator in the correct focused image is the shooting time lag. If the image is clearly out of focus it shall not be used to measure the shooting time lag because in this case the camera may trade the focus accuracy for higher speed (shutter priority) and the image of the timing device Is blurred and unable to show the correct timing. For cameras that do not deliver sharp images when pressing the exposure button fully, the digital still canwra shall be allowed to focus by first pressing the exposure button halfway down; immediately after the camera indicates that it is in focus, the exposure button shall be fully pressed. The timing device shall be started when the exposure button is pressed halfway down and the fact that the digital still camera did not focus correctly without this manual adjustment shall be reported together with the results.
In the case of the internal measurement, appropriate signals shall be directly observed as shown In informative Annex C, and the time period defined in &L1 shall be measured.ISO 15781-2013 pdf free download.
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