Or get closer. Decreasing your distance by dividing by the square root
of 2 (1.4) will increase the exposure by one stop. Dividing by 2 will
increase 2 stops.
For example, if your original distance is 10 feet from the subject,
reducing the distance to 10/1.4 = 7 feet will increase one stop.
Reducing to 5 feet will increase 2 stops.
Chuck Norcutt
Simon Worby wrote:
> Michael Wong wrote:
>
>
>>If I want to enlarge the amount of flash, how do I do? Thanks!
>
>
> If you don't need the full wide angle coverage of the flash, you can
> increase the effective GN by using a zoom adapter, such as the
> "Electronic Flash Zoom Adapter T32" which at 135mm setting increases the
> GN on the T32 to 42.
>
> Simon
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