AskEngineers

Year:

Only show posts with narrations

Placing two disposable camera lenses opposite one another symmetrically creates one lens with half the focal length. Is there a formula or optical procedure for determining correct spacing?

3 upvotes

1 upvotes

Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Placing two disposable camera lenses opposite one another symmetrically creates one lens with half the focal length. Is there a formula or optical procedure for determining correct spacing?	3
What's the simplest way to build an analog one shot timer where turning a potentiometer has an exponential time relationship?	1