Definition of guide number in English:
A measure of the power of a flashgun expressed in metres or feet.
- Such technical items as ‘guide numbers’ don't seem to matter any more.
- Unless you're shooting under those conditions, consider the guide numbers to be estimates.
- Small flashes have guide numbers ranging from 45-80, while large shoe-mount units will be up to around 130.
Definition of guide number in:
- US English dictionary
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.
Most popular in the US
Most popular in the UK
Most popular in Canada
Most popular in Australia
Most popular in Malaysia
Most popular in Pakistan