Guide numbers explained – the maths behind the mystery
By John Aldred
When flashes first started to use Guide Numbers, they were a fairly reliable judgement of how one flashes power stacks up against another. But as flash technology has evolved, the humble Guide Number is often exploited as a marketing gimmick to make flashes sound a lot more powerful than they actually are. In this video, Gerald […]
The post Guide numbers explained – the maths behind the mystery appeared first on DIY Photography.
February 5, 2019 at 09:46PM
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