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| Einstein and 86" white PLM Guide Number? http://www.paulcbuff-techforum.com/viewtopic.php?f=8&t=4910 |
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| Author: | Mack [ Thu Mar 31, 2016 9:58 am ] |
| Post subject: | Einstein and 86" white PLM Guide Number? |
Any estimate as to what the guide number of an Einstein with the white 86" PLM as a shoot-through? Full power at 10 feet @ ISO 100 outdoors. Tia. Mack |
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| Author: | Technical Support [ Thu Mar 31, 2016 4:07 pm ] |
| Post subject: | Re: Einstein and 86" white PLM Guide Number? |
ISO 100 white PLM at 640Ws should yield about f/8 at 10 feet, assuming there is no cover to assist in redirecting. This is true for bounce or shoot through. Remember, when outdoors, ambient light can introduce a significant amount of additional light that would add to this exposure. |
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| Author: | Kenneth.Rhem [ Mon Apr 04, 2016 8:23 am ] |
| Post subject: | Re: Einstein and 86" white PLM Guide Number? |
I'm interested in this as well. How much better would it do with the spill kill cover? Or, does it preform any differently at all. Yes, I already recognize the added advantage of not having all of that reflected light pouring out of the back of the umbrella. |
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| Author: | Technical Support [ Mon Apr 04, 2016 4:19 pm ] |
| Post subject: | Re: Einstein and 86" white PLM Guide Number? |
Adding a black outer cover or a spill kill fabric will add about a stop vs all else being equal but without these fabrics. So, f/11-ish at 10 feet. |
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