Profoto B10 review: Comparing the power of the B10 vs B1 and B2
Still not the proper review of the Profoto B10 yet, but I wanted to highlight one aspect of the Profoto B10 (B&H) – how its power compares to the Profoto B1 and B2. What specifically piqued my interest here, past the specs of 250Ws, is this video by Michael Anthony, where he mentioned that the B10 gives 2/3rd stops more light than the Profoto B2, even though they are rated for the same output: 250Ws. I must admit to being skeptical about this, so I decided to investigate further.
The summary is that, the Profoto B10 really is more powerful than the spec sheet would suggest.
With direct flash, the B10 gives 2/3rd stops more light than the Profoto B2, and about 1/3rd stop less than the Profoto B1. I was hugely surprised by this, and thought this might be due to how the light is spread by each flash. I therefore decided to test this by bouncing the flash into a large umbrella, and then metering what the output was – the results were fairly similar:
The Profoto B10 gives 0.5 stops more light than the similarly rated Profoto B2, and only 0.5 stops less than the bigger Profoto B1.
Note that I limited the scope of this test. I didn’t test for output with high-speed flash sync. Neither did I test for recycling times.
[ Correction: In the video I somehow mistakenly kept referring to Watts/second, instead of WattSeconds (Ws) to describe the flash power.]
You can pre-order the Profoto B10
The Profoto B10 basic kit also includes:
I tested this several times with different light meters, and the results were consistently the same as shown in this video – the Profoto B10 is 1/2 stop brighter than the Profoto B2, and only 1/2 stop less bright than the Profoto B1 (even though the spec would indicate a stop difference.)
In this video, metering for the direct flash at 10 ft away, at 100ISO, we got:
B10: f8 + 7/10th of a stop
B1: f8 + 9/10th of a stop.
When we equalized this with the umbrella, (and I have to apologize for over-using that word in the video), we got:
B2: f/5.6 + 1/10th of a stop
B10: f5.6 + 6/10th of a stop
B1: f8 + 1/10th of a stop.
The Profoto B10 (B&H) is going to prove to be a remarkably versatile flash in a really compact form – you get a powerful flash, and a powerful video light (with variable WB). The battery is rated for 400 full pops! Then there is the Profoto app which opens more possibilities too.
- review: Profoto B10 flash – a first look
- Profoto B10 flash – Creativity Unleashed
- review: Profoto A1 flash – video review
- review: Profoto B2 Flash – photo shoot
- video clip: BTS – Profoto B2 review photo shoot
- Comparing output: Studio lights vs. speedlites / speedlights
- For more videos, follow me on Vimeo / YouTube