Many of the older items can still serve their purpose with an even greater value for money than when purchased new.
The first page features the Canon Speedlite 420EX Reference which has been a valuable assistant in filling-in and background lighting my setups for several years.
I hope you can find some valuable info in the ilustrations
Photos © 2010-2012 S.C.Vlachos
Canon Speedlite 420EX Reference