Emolux 52mm Metal Lens Hood For Canon/Nikon 50mm F1.8

LENS - An optical element which converges or diverges light

Black - A colour which does not emit any colour of the spectrum. Black absorbs all frequencies of the spectrum.

Diameter - A measurement across a circle passing through the middle

Canon - A Japanese company specialising in imaging and optical products

weight - A measure of the force applied on an object by gravity. Measured metric in grams and kilos or imperial in lbs and oz

Quality - An object that has quality is superior in function and finish than a less quality object.

Weight - a measurement of how heavy an object appears due to the pull of gravity. For example the weight of an object on planet earth will be different to the weight of the object on the moon

F1 - a high level automobile racing tournament

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