Okay here we go....im wondering how you choose exactly what f stop you set your lights to....i've been setting my key light 6.7 and shooting at 6.7 as per the instruction i recieved at dave blecman's wonderful workshop.... i just never really questioned that i guess. however, after reading a few articles here and there i came across a maxim shoot where the photographer shot at f18...even though the key light was f16 and the background lights were f22....i understand the background lights were brighter to obtain pure white on the background but why did he purposely underexpose the model? In the image she seemed perfectly exposed. I guess what I'm getting at is does it matter what you choose as your starting f stop as long as the ratios are right? for example setting your key light at f 8 as long as the other lights are ajusted accordingly? or seeing your key light at f 22 as long as everyting follows accordingly.... i know the f18 shot would have had greater depth of field but would that necessarialy make the image sharper? is that why it was shot at f18? Also if working f stops in the studio are generally higher....i.e. f 5.6 and up....how come all the "pro" lenses are the ultra fast f 2.8 lenses? it seems that 2.8 would be pretty out of place in the studio....im sorry if these questions appear stupid but im new to this and this has just been bothering me it probably has a very simple and obvious answer. also if someone has any info about how to best calibrate a light meter to your camera id love the info! thanks!
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