Profoto B10 review: Comparing the power of the B10 vs B1 and B2
Something I mention in the review: Profoto B10 flash and want to highlight about the Profoto B10 flash (B&H / Amazon) – how its power compares to the Profoto B1 and B2. What specifically piqued my interest here, past the specs of 250Ws, was mention online 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 order the Profoto B10 via these affiliate links
- Profoto B10 flash (B&H / Amazon)
- Profoto Core Backpack S (B&H / Amazon)
- Profoto B10 flash duo kit (w/ Core Backpack S) (B&H / Amazon)
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 / Amazon) 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
- review: Profoto B10 flash – a first look
- Profoto B10 flash – Creativity Unleashed
- review: Profoto A1 flash – video review
- review: Profoto B2 Flash – photo shoot
- Comparing output: Studio lights vs. speedlites / speedlights
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