paul_d5 Posted September 19, 2006 Share Posted September 19, 2006 Anyone using an umbrella with a 580EX or SB800?I was wondering what f stop exposure you are obtaining. Link to comment Share on other sites More sharing options...
michael_madio Posted September 19, 2006 Share Posted September 19, 2006 Umbrellas generally reduce the effective output by 2-3 f-stops. The rest is a simple guide number calculation using the new effective GN. Link to comment Share on other sites More sharing options...
m3rdpwr Posted September 19, 2006 Share Posted September 19, 2006 Keeping in mind light falls off with distance. You won't get the same amount of light falling on the subject moving the source further away... -Mario Link to comment Share on other sites More sharing options...
paul_griffiths Posted September 20, 2006 Share Posted September 20, 2006 I use an SB800 at 1/4 power at 400asa I get f8 at about 6 feet. See attached image. Link to comment Share on other sites More sharing options...
guts80 Posted September 20, 2006 Share Posted September 20, 2006 Combined with Nikon's CLS system I've got a fantastic portable on-location studio setup. The attched image was shot with a single SB600 camera left w/ Phofoflex 30" silver umbrella at TTL+0.3 ISO 400, 1.6" @ F/5.6. On-hoteshoe SB800 acting as master. The power was probably at around 1/8 or 1/16. However the issue with using hot shoe flash is the reduced power. Lights can not be placed too far from the subject. ISO 100 F/5.6 at full power with the umbrella is only about 7 feet max when outdoors. Link to comment Share on other sites More sharing options...
guts80 Posted September 20, 2006 Share Posted September 20, 2006 Sorry forgot to attach the image Link to comment Share on other sites More sharing options...
guts80 Posted September 20, 2006 Share Posted September 20, 2006 Okay the image should display inline now.... Link to comment Share on other sites More sharing options...
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