# Canon Speedlite 580EX II The Canon Speedlite 580EX II is a professional shoe-mount camera flash. In the notebook it appears only as “J43 Canon Speedlite 580EX II”; `J43` may be an inventory, bin, location, or job code. ## Source - [[Scanned_20260730-1230#PDF Page 32|PDF page 32]] — Written beside the [[Mackie Onyx Blackjack]] component record. Ownership, condition, camera pairing, and the meaning of `J43` remain unresolved.