Shutter speed affects ambient exposure. Model: Dina Massery.
A quick example showing how shutter speed affects ambient exposure. Notice that in each shot, the only camera setting that changed was the shutter speed. The actual brightness of the lamp in the background was not adjusted between shots. The flash exposure remains the same. The lamp appears brighter as the duration of the exposures increase.
In short, when you have your flash exposure set correctly (manually or TTL), all you have to do to increase the visibility of the ambient light is lower your shutter speed.
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Dear Ed ,
you raise very important point but my challenge remain with the aperture values for faces and i hope you will discuss this in detail one time ..
what is the best aperture value you would recommend for extremely sharp face and eye lashes details in a normal indoor good day light with the use of your flash system ?
i often use f4 to get background blur but as a result i might have the far eyes not as sharp as i want it be ! am i doing something wrong or is it the f4 aperture ? ( i used both 85mm 1.8 and 24-105 L 1.4 on 5MKii )
please help