What is a Book Light?

Here's 4 examples of ads we used a book light for. What have you all used it for?
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[@1smores]

This is the best explanation to how to set this up

[@yisusao]

I am very grateful to find your channel, excellent explanation

[@chinopalos]

Thank you again for this incedible Video! Please Keep in doing them

[@jaceplatt188]

Ooohhhh, so thats how you do it. Well that answers my question, thx man!

[@pizzomedia7261]

Nice video. How do you control spill using a book light with minimal grip? In always find this to be a challenge. Thanks!

[@AshConnaughtonDP]

use book lights all the time! on a toy commercial, a documentary for CBBC and a short film all at the end of last year, using them pretty often on the long drama job im on at the moment too!

[@TheObsessiveDP]

fantastic! Those situations sound about right

[@user-uo5om7sx2p]

COOL I HOPE YOU GET 1000000000 SUPS

[@IRoseSpidey]

I hope everyone is having a safe and spectacular day! 😃💙 #NotificationSquad

[@TheObsessiveDP]

You too!

[@jorgekas1]

Great explanation, bad autofocus