How is the strength of a flash unit indicated? - ProProfs Discuss
Advertisement

How is the strength of a flash unit indicated?



Asked by Provor, Last updated: Nov 19, 2022

+ Answer
Request
Question menu
Vote up Vote down

2 Answers

e.Susan

e.Susan

e.Susan
E.Susan

Answered Dec 05, 2017

The strength of a flash unit is often indicated by a guide number. Similar to camera stops, flashes have special stops as well. They are known as flash ability, and are assessed in fractional increments. They are also often described as, full power, half-power, quarter-power, etc. Moving one-step at a time along this size (from full capacity to half-power or from half-power to quarter-power) is one stop difference.

Precisely the same change as when modifying your shutter rate or aperture one stop. Based on your unique display model or brand, 1 /2 or even 1/3 stop flash power increments might be possible, similar to in-between shutter speed and aperture modifications. On some flashes, the power is displayed as a direct conversion on the display LCD screen.

upvote downvote
Reply 

provor

provor

provor
Provor

Answered Sep 01, 2017

Guide number
Guide Number
Guide-Number
Guide-number
upvote downvote
Reply 

Advertisement
Advertisement
Search for Google images Google Image Icon
Select a recommended image
Upload from your computer Loader
Image Preview
Search for Google images Google Image Icon
Select a recommended image
Upload from your computer Loader
Image Preview
Search for Google images Google Image Icon
Select a recommended image
Upload from your computer Loader

Email Sent
We have sent an email to your address "" with instructions to reset your password.