Compatible with EOS IV / EOS 3 / other E-TTL cameras
Circular twin flash tubes can fire at even power, or varied between them over a six-stop range
One or more 550EX Speedlites can be used as wireless slaves along with the MR-14EX
Twin-tube ring lite designed for close-up photography with EF Macro lenses; Flash tubes can fire together or independently
Compatible with all EOS bodies - (1) Supports E-TTL, FE Lock and FP Flash (hi-speed sync) functions with Type-A EOS cameras, (2) Supports Ratio Lighting Control in E-TTL, FE Lock and FP Flash modes with EOS-1V and EOS-3, (3) Supports TTL, Flash Exposure Bracketing and Variable Power Manual Flash with all EOS cameras featuring manual exposure, plus T90
Supports E-TTL Wireless Autoflash in conjunction with one or more 550EXs
Attaches directly to EF 50mm f/2.5 Compact Macro, EF 100mm f/2.8 Macro (both versions), and MP-E 65mm Macrophoto Lenses (can also be used with EF 180mm f/3.5L Macro USM via Macrolite Adapter 72C)
Incandescent focusing lamps and two forms of modeling flash permit preview of lighting effects
Illuminated LCD panel for easy flash settings in any lighting condition
Compatible with AA-size alkaline, lithium, Ni-Cd and Ni-MH batteries; Accepts optional Canon-brand external battery packs (Compact Battery Pack CP-E2 and Transistor Pack E)
Guide Number 14/46 (at ISO 100, m/ft.)
Type of flash - Ring Lite, twin circular flashes tubes, and separate Controller Unit.
Standard Power Source - 4 AA batteries in Controller (Alkaline, NiCd, Lithium and Ni-MH type AAs are OK)
Optional Power Source - External battery packs Compact Battery Pack CP-E2, Transistor Pack E
Control in E-TTL Mode - FP sync, FE Lock, Flash +/- compensation, Flash Exposure Bracketing
Control in Manual Mode - Flash +/- compensation, Flash Exposure Bracketing
Ratio Control in Manual - L:R tubes (A:B) in full steps over 1/1 ~ 1/64 range, full steps
Setting Method - LCD panel on Controller Unit (illuminated), similar to 550EX Speedlite
Custom Functions - Seven on the MR-14EX (in addition to any in camera), set on flash LCD