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/home/cptrental1/public_html/denizko/wp-includes/functions.php on line
5413
PL 1.4x Extender
The extender allow the focal range of the optics to be extended, whether they are fixed focal or variable (zoom). There are two versions: 1.4X that only subtracts a Stop of light or the 2X that subtracts two steps of diaphragm. Both extend the focal multiplying by the magnification factor.