The Program Flash 5600HS(D) and the Program Flash 3600HS(D) include convenient functions such as a bounce flash function and remote off-camera flash operation. The Macro Twin Flash 2400* supplies flexible lighting for nature-oriented macro photography, and the Macro Ring Flash 1200 provides shadowless lighting geared towards scientific and medical applications. Auto flash metering is available with each of these four flash units.
* Macro Flash Controller required.

Compatibility with external flash units

	PROGRAM FLASH 3600HS(D)	PROGRAM FLASH 5600HS(D)	Macro Twin Flash 2400 Macro Ring Flash 1200
Program Reset	Yes	Yes	Yes
ADI Flash Metering	Yes	Yes	N/A
Auto Power Zoom	Yes	Yes	N/A
Ratio Flash	No	No	N/A
High-speed Sync	Yes* (synchronizes with all shutter speeds) * High shutter speed may result in underexposure depending on the subject distance.		N/A
Wireless/Remote High-speed Sync			N/A
Slow-shutter Sync	Yes	Yes	Yes
Wireless/Remote Off-camera Flash	No	No	No
Modeling Flash	N/A	Yes	Yes
Multiple Flash	N/A	Yes	N/A
Manual Flash Control	N/A	Yes	N/A
AF illuminator	No	No	N/A
Flash indicator (to indicate that the exposure was correct)	Yes	Yes	Yes