Optical lenses and magnification in archery*

Optical lenses and magnification in archery*

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The use of optical lenses to increase or magnify a target of concern is commonly used in compound bow archery.The principles and factors that may influence the use of these lenses may, however, not be fully understood by archers.Two types of lens systems, the one-lens system bengals dog collar and the two-lens system, as described by the authors, may be used.Different factors such as the draw length of the archer,the ametropic condition of the archer, depth of field, depth of focus, age, accommodation, the power of F1 and F2 (see Figures 1 and 2 in the paper) and the distance the lens is placed blue square tablecloth from the archer may influence the results of the lens used by the archer.(S Afr Optom 2010 69(1) 29-34).