I was working on a gig w/ someone using a wide-angle adapter, a 0.8x but zoom-through (sony made on a sony cam). Since it was zoom-through, he basically left it on all the time for his shots, so that even when he was zoomed in, he'd still get a wider shot.
My question is this... how would an additional piece of glass affect getting a shallow depth of field? As I understand it, on cameras with zoom lenses, your depth of field is related to the distance between the pieces of glass on the lens. I can't remember if it's directly proportional or inversely, but if the distance between the pieces of glass affects the depth of field, would adding a wide angle adapter affect that as well?
For this example, we were trying to do a shot with a woman putting on makeup in a mirror and her husband in the background, out of focus, then racking between them. With the adaptor on, we were able to sufficiently get the shot by putting her between the camera and a mirror, then bouncing off the mirror to the husband in the background.
My question is, would this have worked better or worse without the adaptor? I can't zoom that much with mine so I typically only use it when I need to go REALLY wide, but my thinking is that if the depth of field is inversely proportional to the distance between the pieces of glass, then the additional adaptor could create a more shallow depth of field, but if it's the opposite, then a wide-angle could work against shallow depth of field. Or, the third option, it has no affect on it at all.
My question is this... how would an additional piece of glass affect getting a shallow depth of field? As I understand it, on cameras with zoom lenses, your depth of field is related to the distance between the pieces of glass on the lens. I can't remember if it's directly proportional or inversely, but if the distance between the pieces of glass affects the depth of field, would adding a wide angle adapter affect that as well?
For this example, we were trying to do a shot with a woman putting on makeup in a mirror and her husband in the background, out of focus, then racking between them. With the adaptor on, we were able to sufficiently get the shot by putting her between the camera and a mirror, then bouncing off the mirror to the husband in the background.
My question is, would this have worked better or worse without the adaptor? I can't zoom that much with mine so I typically only use it when I need to go REALLY wide, but my thinking is that if the depth of field is inversely proportional to the distance between the pieces of glass, then the additional adaptor could create a more shallow depth of field, but if it's the opposite, then a wide-angle could work against shallow depth of field. Or, the third option, it has no affect on it at all.
