Mark A. Cella is a distinguished fellow of film studies at California State University in Los Angeles. He’s a published writer on Cinema History and Film Theory. He has directed over 35 shorts and documentaries, including the award winning “Marlboro House”, which took top prize at the 2006 Slamdance short competition.
Today Extension Tubes - These are a handy way to turn any long lens into a macro lens for ultra-close shooting. They are hollow metal tubes that are mounted between the camera and the lens. Typically they come in a set of different lengths which can be combined. It is a good idea to open up the lens a little when using an extension tube, as a little light is lost. It should be noted that they do not work when used with wide lenses.
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