EmaginePixel wrote in post #17955500
Rand, thanks for the info. Would you say 2/3 stop is rated equivalent to 400W? If so then, how much more (in stops) is the AD600 over the AD360IIs? I have a feeling that the AD600 is comparable to Profoto B1 (500W) at best.
Not really sure how to compare WS of strobes to any valuable degree to where you could use those figures to be a true representation of a strobes performance. Those figures are good for giving you some idea of the classification of a strobe and a relative expectation of the strobes performance but I take them with a grain of salt. There are so many variables to consider, that could affect the flash exposure output, even when using the same modifier in the same setup.
When I did the testing it was to help Elv verify some results he was getting when testing these strobes. We came to the conclusion that the flash tube design possibly had a lot to do with the difference in the readings. There is a big difference between the flash tubes of the RL600B and AD600B, and the way the bulbs are positioned in the modifier. This difference in flash tube design and the method of testing (flash meter 4' from center of modifier) may not be giving a true representation of the flash capability, and it definitely does not give a true representation of the overall performance and the features of that flash.
The AD600 has so many great features, when compared to other 500-600WS battery powered strobes, that a few 1/3's of a stop of flash output here or there is not going to make a difference to me. I have many options when working with the output of any given flash but, I am not going to pay $2500 for a Profoto flash and transmitter that can't even do a global FEC, nor am I going to go cheap for an RL600B that that takes twice as long to recycle as the AD600BM, has Faux HSS requiring flash sync timing, etc... The list could go on and on of all the pro's and con's to where the flash meter reading difference, taken 4' from the center of a given modifier, is of no real significance other than to throw into the mix of conversations in a forum. In the end it is just information to consider but hopefully it's not the sole basis for choosing a strobe.