Your flash synch is the fastest shutter speed at which the shutter curtain reveals the entire sensor at once. Using a shutter speed faster than your flash synch will reduce the amount of light your camera sees from the flashes. Reasons like this are reasons people turn to other camera systems such as medium format with leaf shutters in the lenses to allow for much faster flash synchs. I certainly did it when I started out messing with strobe lighting.Īlso when using studio lighting, if your modeling lamps are not bright enough to let the camera auto-focus with a Neutral Density filter, many people stop down towards F/16-22 to get proper exposure (assuming your SLR has a max flash synch speed of 1/200-250). People that don't necessarily know of or use Neutral Density filters usually stop down in bright light to get a certain shutter speed. EC on the body will do same but for the background. EC on the flash darkens or brightens the human skin. The flash will expose the foreground (subject/s). In summary, when placing the body in M mode, it will expose the background, making it darker or brighter depending on what you need.
F STOP IN PHOTOGRAPHY SKIN
that would calm down the background and still the flash will expose the human skin perfectly. Or one could use a ND filter causing the light to dim 3-4 or mor stops.
F STOP IN PHOTOGRAPHY ISO
One could shoot at ISO 100 or L (ISO 50) and see if that will cause the under-exposure of the background (when body in M mode). of course one has to be mindful of the flash sync speed of the body, so one needs to keep the shutter speed in that range. In this way, you get a less over powering background, yet expose the human skin perfectly. In this way, you place the body in M mode, flash in E-TTL mode, let the body under-expose the background 1-2 stops by stopping down the lens past F16, then the flash, using E-TTL, will expose the subject/s perfectly. Second, for flashing a subject which is backlit by a brighter background, and during the daytime. However, there are good reasons to use F22 and in these cases infraction can be a small price to pay.įirst, almost never for landscapes.because with most lenses F8 - F16 is more than sufficient DOF, for sharp images. With most lenses stopping down below F16 can cause light infraction which softens the sharpness rather then the expected sharper focus.
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