Timeline for What is the power output from two speedlites combined?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Sep 2, 2016 at 16:45 | comment | added | Alan Marcus | The Guide Number intertwines the brightness of flash as it relates to distance. These multipliers apply to both Guide Number adjustments and lamp-to-subject distance. They are worthy to use for lamp distance adjustments to establish the lighting ratio provided the lamps are identical. The same multipliers operate with Guide Numbers for exposure compensation. Caution Guide Numbers are just guides based on specific environs like size of room, ceiling height and reflectivity of surroundings | |
| Sep 2, 2016 at 16:13 | history | edited | Alan Marcus | CC BY-SA 3.0 |
added 80 characters in body
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| Sep 2, 2016 at 16:07 | comment | added | Michael C | Could you please make clearer exactly what is being multiplied by 0.7, 0.84, 1.2 or 1.4 in the penultimate paragraph to change exposure by +1, +1/2, -1/2, and -1 stop? The f-number? The GN of the flash? The flash to subject distance? Etc. | |
| Sep 2, 2016 at 15:42 | comment | added | mattdm | This is covered at What is the relationship between Guide Number and flash power level? — your answer would fit nicely there. | |
| Sep 2, 2016 at 15:12 | history | answered | Alan Marcus | CC BY-SA 3.0 |