[. . . ] With Type H cameras (EOS cameras except 'I'ype A models), the ST-E2 can be used only for manual flash and multi-flash photography. See pages 23 to 27 in t h i s booklet a n d t h e Speedlite 550EX Instructions. ' O PY a: I C With the EOS-3, the following operations a r e also possible: Flash ratio control between two Speedlite slave P ~ O U D S . modeline flash firing. and linkage of -, A F - a s k t dea'm to a r e a k . Symbols used in this Instructions booklet: 0: Warning for preventing c a m e r a or ST-E2 malfunction. Keep this Instructions booklet handy for future reference. I 1. C The C E Mark is a Directive cunformity mark of the European Community (ECl This digital apparatus does not exceed t h e Class B limits for radio noise emissions frnrn digital apparatus a s set out in the interference-causing equipment standard entitled "Digital Apparatus", ICES-003 of the Industry Canada. Contents 1. [. . . ] Readying the 550EX (Slave Setting) (4) Channel Setting (1) Slave settingIPower on (2) Channel setting C To prevent wireless signals from being transmitted to unrelated S p e e d l i t e 55OEX u n i t s i n t h e vicinity, you can set a channel different from the one used by the unrelated Speedlite 550EX units. T h e ST-E2 ( m a s t e r ) and s l a v e Speedlite(s) must be set to t h e same channel No. > button a n d select the desired channel. Each time the button is pressed the channel indicator changes in the following loop: 1 2 - 3 - 4 1 . . T h e ST-E2 a n d Speedlite 550EX must be set to the same channel No + 1< O S e t t h e w i r e l e s s selector t o SLAVE >. H e r e i n a R e r , a S p e e d l i t e 5 5 0 E X s e t to t h i s mode will be called a "slave. " PY SE : RATIO E a c h t i m e you p r e s s t h e < SEL/SET > button, the blinking display changes in the following loop: The zoom setting is set automatically to (a c7'lmm. T h i s can be overridden manually. +m+------ lights - , While is blinking, press or < to the < 2 Set>the<slave'stomain switch to 2 select + zsame - > butlon as < I or > turn it on. the channel No. When t h e Speedlite is ready t o fire, the AF-assist beam emitter blinks conli~>uouslyt 1 Hz. a the ST-E2's. If 0 d i ftfheer e550EX'smchannelTNo. 2iss nt fro t h e S -E ' c h a n n e l No. , w i r e l e s s t r a n s mission will not work. - 4. Basic Wireless E-TTL Autoflash Operation . press t h < ton h e ST-E2 a n s l a v e e ready, they can 3 toi sregsteres tthe schanneli Nbgu~ta(the After tbelow for easydwirelessa rE-TTI. autoflash. work w i t h i n t h e a r e a , shown d play op blink n nd SEL/SET, For explanatory purposes, t h e EOS-3 will be used a s t h e sample camera here. stays on). ( I ) Positioning of ST-E2 and slave Attach t h e slave to t h e mini s t a n d (equipped with tripod socket) which comes with t h e 550EX. Turn t h e Speedlite's body (bounce feature) so t h a t t h e slave sensor fhccs toward t h c ST-EZ. After 50 consecutive wireless transmissions, allow the ST-EP to rest for 10 minutes. 28 45. Wireless Multi-Flash E-TTL Autoflash Operation T h e r e a r e t w o t y p e s of wireless multi-flash E-TTL autoflash opcrations: < RATIO > O F F : All slaves fire the same flash output. T h e f l a s h ratio is then set for each ID. a All t h e s l a v e s s e t a t t h e s a m e c h a n n e l fire a t t h e s a m e o u t p u t controlled by E-TTL autoflash t o obtain a correct exposure. Thc operation ~rooedure thc same is a s with wireless I. >-'ITI, autoflash. EOS-3, make sure the 0 WithEtheoff. l a(Ifhnecessary, press S T - 2 ' s f s r a t i o control lamp is Sample Multi-Flash Setup with Uniform Flash Output In t h e sample flash s e t u p shown below, t h e lighting on t h e left will be b r i g h t e r t h a n on t h e r i g h t of t h e subject. +%- C O a The flash ratio can be set only when the camera is an EOS-3. The flash ratio cannot be set with an EOS Elan IVIIE, EOS 50/5OE, EOS Rebel G/500N, EOS IX or EOS K71X Lite. Press the < > or < - > button to set the slave ID to <A>. About Slave Group Control 2 button 3 Press t h e <the slave >ID. (The to register slave I D stops blinking a n d stays on. ) same 4 Follow theslave toprocedure for the other set the slave All slaves s e t to the same ID a r e controlled a s one group. Shown below is a g r o u p of t h r e e slaves whose ID is A. They will be controlled as a single slave group A. Wireless Multi-Flash E-TTL Autoflash Operation (2) Setting the A:B Flash Ratio The flash ratio between slave A and slave B can be set to specify the main flash and fill flash. The flash ratio can be set from 8:l to 1 and from 1 to 1:8 in half-stop increments. In terms of exposure stops, it ranges from 3:l to 1 and from 1 to 1:3. When the flash ratio is set, ETTL autoflash metering controls the flash output to obtain a correct exposure. (3) Camera and Slave Positions Position the ST-E2-attached camera and the two slaves to obtain t h e desired lighting effect. [. . . ] When the slave is ready to fire, ~ t s A12-assist beam 27 emltter blinks Turn off the flash ratio control lamp bcforc takinp the picturr~. 29 28 Place the slave nearer to the suhect or use 3 largc r aperture (smaller f-number). T h e s l a v e d ~ ~ nclt fire evcn 'I'hc s l ~ i v r ' s cs channel does not lnatcli the ST-E2's Set thr slavc to thesamechannel as thr ST-E2. r is Position t h e slavc nearer to the ST-E2 :ind tcst the transmission befirrc taking the picture. is r Use On'-(:amera Shoe Cord 2 (solrl separatrlyl and point the ST-E2's trtlnsmitter toward the slave. [. . . ]