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. ST-E2 Speedlite Transmitter User Review Peter Kun Frary The E-TTL flash system made my slaves useless due to the pre-flash used to measure exposure. Subsequently, I'm rebuilding my portable flash system and acquired a ST-E2 Speedlite Transmitter. This wireless flash controller transmits an infrared trigger (no wires needed), exposure and flash ratios to EX Speedlites. The wireless possibilities are exciting, especially getting the main flash off the camera. The ST-E2 also sports a powerful near infrared AF assist light, a welcome feature for EOS cameras lacking an AF assist light. Canon ST-E2 Speedlite Transmitter Mounted on an EOS Elan 7E • EOS 10D, EF 50 2.5 Compact Macro, Remote Switch RS-80N3, 420EX Speedlite bounced off a white reflector, Off Shoe Cord 2 and Bogan Tripod. I'm mainly an outdoor photographer and, thus, work principally with available light. Most of my flash use consists of daylight fill. My recent experiments in macro photography lead me to the conclusion I needed to move the flash off camera and away from the subject for better modeling and exposure control. Admittedly, I'm a flash novice and this review reflects the limited scope of my involvement with wireless E-TTL photography. The ST-E2 should be used with an E-TTL capable camera and Speedlite for best results. A-TTL cameras such as the EOS A2 or 1N only work in manual flash mode with a ST-E2 and 550EX (420EX has no manual controls). Appearance The ST-E2 is small and light, much more so than any Speedlite. It weights 100 g (3.5 oz) and is 62H x 51H x 80D mm. The power source, a 2CR5 lithium battery, is extremely light, especially when compared to AA batteries. Thus, it balances well on the Elan 7 with a small lens and BP-300 grip. I really can't feel a difference in weight with the ST-E2 attached to my EOS 3 or 10D. Although light, it appears well built, perhaps a little more beefy than the 420EX Speedlite. The oversized near infrared AF assist light is powerful and projects a pattern of horizontal lines about 34 feet in total darkness. Wittner MT-70 Metronome • Canon EOS 10D, EF 50 2.5 Compact Macro, Bogan 3001 tripod, 420EX Speedlite triggered by the ST-E2 and bounced off a white panel (-2.0 flash AE comp) AF Assist Light The ST-E2 is optimized to work with the 45-sensor AF arrays of the EOS 3, 1V and 1D series cameras. Indeed, the AF assist light works perfectly in ECF, manual AF sensor selection and auto AF sensor selection modes with my EOS 3. If you often shoot in low available light conditions and have difficulty locking AF, the ST-E2 is an excellent fix (at least within the AF assist beam range). The deep red AF light is extremely discrete--I can hardly see it--and won't offend most subjects. I tested the ST-E2 with my 5D in a dark bedroom. It projects the AF pattern for auto selected AF points and covers all of them. However, when I select individual AF points, it does not project for the upper and lower most center points of the diamond. It works perfectly for the other 7 AF points, including the far left and right points (will snag AF on a plain white wall). The results are exactly the same on my 20D and 40D. I don't have a 30D but I'm pretty sure behavior is the same as it has a similar AF array. It also does an excellent job with the Elan 7E and 10D, but isn't a perfect fit. The AF assist light of the ST-E2 projects a pattern of horizontal lines that cover all 7 AF sensors of the Elan 7 and 10D in auto selection mode. Unfortunately, only the 5 horizontal sensors seem to work with the AF assist beam. Why? The ST-E2 doesn't emit the AF assist light when the top or bottom AF sensors are selected via ECF or manual selection. Perhaps this is because the top and bottom sensors of the Elan 7 and 10D are mainly sensitive to vertical lines and, thus, are unable to achieve AF with a horizontal pattern. However, I don't miss the top and bottom AF sensors much (too many years of using an A2 and EOS 1N). In low light, I often prefer to AF with the center cross sensor and leave the others off along with ECF. However, I tested the ST-E2 with all 45 AF sensors of the EOS 3 and 7 sensors of the Elan 7E and 10D. In automatic sensor selection mode, I found it locked on to anything in total darkness, even a blank white wall while using a slow zoom. However, the outer edges of the horizontal line pattern are fainter than the middle, leading to focus difficulties with outer AF sensors after 20 feet. However, I can often snag focus with the center cross sensor with objects over forty feet away. The official AF assist range is 34 feet. There were no differences in AF speed with the 420EX or ST-E2 attached to my Elan 7E or 10D. However, with the same lens (EF 28-105 USM), center AF sensors selected, my A2 and its built-in AF assist light is slightly faster at focusing. The Elan 7E adjusts AF (rocks back and forth slightly) before locking. The A2 just flies to it and stays. On the Elan 7E, you may set CF7-3 to disable flash but retain AF assist. On the 10D, set CF5-3 to disable flash but retain AF assist. Unfortunately, the EOS 3 lacks this custom function. Off-Camera Flash I've experimented extensively with the ST-E2 and 420EX and found the possibilities endless. I walked about with the Elan 7E/ST-E2 in my right hand and the 420EX flash in my left hand and shot party portraits. I could quickly control the angle and height of the flash for more pleasing results than shoe mounting the flash. Also, bouncing off a ceiling or wall was much faster than using the normal tilt and swivel features of the 420EX. Of course, there were no red eye problems whatsoever. For small group shots, I often placed the 420EX 5 or 6 feet to one side (on a stand or held by a volunteer), enough for good modeling and a little bounce off a white wall for fill. I've used similar techniques with the Off Shoe Cord 2 many times, but the ST-E2 is more convenient and flexible. By the way, the ST-E2 works great with the Off Shoe Cord 2 if you need to trigger Speedlites behind your shooting position. While in slave mode, Speedlites omit near infrared pulses, making them easy to find in the dark! 1990 Jose Ramírez 1A • Canon EOS Elan 7E, EF 50 2.5 Compact Macro, Bogan 3001 tripod, 420EX Speedlite triggered by the ST-E2 and bounced off a white panel & Fuji NPH 400 The ST-E2 works great on the EOS IX except for 2 features: ratio control and modeling light (it is an E-TTL model). Unfortunately, the ST-E2 manual states that several other E-TTL cameras also lack ratio control and modeling light features: Elan IIE, IX Lite, Rebel 2000 and Rebel G. I shot many small objects with the EOS 3, Elan 7E, 10D, ST-E2 and 420EX flash with excellent results. For the Walkman image below, I placed the 420EX on the floor 5 feet to the left, set the Walkman on a black velvet pillow and used a foil reflector on the right for fill. I used no compensation and let the Evaluative flash meter do its thing. Before I took the exposure, I used the DOF button of the Elan 7E to activate the modeling light, a handy feature for checking lighting angles, shadows and ratios. Canon BG-E4 Battery Grip • EOS 5D (M mode), EF 24-105 4L IS USM, ST-E2 Speedlite Transmitter, 430EX Speedlite (bounced into white panel) and Bogan Tripod. Unfortunately, I don't yet own a second Speedlite, but was able to test the ratio control with a borrowed 550EX for a couple days. Other than occasional use of optical slaves, I have no experience with multiple flash lighting and ratios, so I have a lot to learn! However, I was impressed at how easy it was to set ratios with the ST-E2: enable ratio control and scroll to the desired ratio. Ratios from 8:1 to 1:1 to 1:8 are available for the main and fill Speedlites. The modeling flash, activated with the DOF button on the Elan 7E and EOS 3, was very helpful in selecting the correct ratio. Unfortunately, I used up a set of flash batteries playing with it! You must set a custom function on the camera (e.g., CF 6-1 on the Elan 7E) to enable second curtain sync on the 420EX. When the 420EX is shoe mounted or used with the Off Shoe Cord 2, second curtain sync is operational. Unfortunately, second curtain sync is disabled in slave mode (wireless mode) with the ST-E2 and 420EX (or any other EX Speedlite). The IR trigger beam is wide and strong, so line of sight isn't usually necessary. The ST-E2 can trigger the 420EX Speedlite even when facing the the opposite direction (it reflects off nearby surfaces). In the image below, the 420EX was pointed at a reflector on the right side of the ST-E2. Canon EOS Elan • Photo taken with EOS 5D/24-105 4L IS USM, ST-E2, & 430EX Speedlite bounced into white reflector. Display Bug with 5D & ST-E2 I found a minor display glitch when using the 430EX with the EOS 5D and ST-E2. While in slave mode, the 430EX does not display E-TTL on the LCD (the mode area is blank!). E-TTL is displayed on the ST-E2 and all 430EX features such as FEC are functional. Flash exposure is fine and unaltered by the display glitch. Owners of the 580EX have reported both a display bug and inability to set FEC when using the ST-E2 and 5D (I don't own a 580EX and thus can't confirm this). Fortunately FEC may be set both on camera and the 430EX, so that particular bug does not effect the 5D-430EX-ST-E2 combo. The E-TTL display bug appears to be an issue with the EOS 5D only, e.g., doesn't happen with my EOS 3, 10D or Elan 7NE. In other words, it's a 5D glitch, not a 430EX bug. Hopefully Canon will fix it with a 5D firmwear update. As of this writing, my 5D uses firmware 1.05. Update (7/26/2006): The display bug with the 5D, ST-E2 and slave was fixed in the 1.10 firmwear update for the 5D. Lens for Ebay • EOS 5D, EF 50 1.4L USM, 430EX Speedlite bounced onto reflector & triggered by the ST-E2 Speedlite Transmitter, ISO 200, F16 in Av Mode. Conclusion Most weekend shooters will be happy with an EOS SLR and a Speedlite. However, if you need a wireless multiple-flash system for field work, the ST-E2 is an essential tool along with a 430EX or 580EX Speedlite or two. The precision and flexibility of the system beats the tar out of wires and optical slaves. Plus, you also get a wonderful AF assist light to boot. Specs Type: Clip-on Speedlite transmitter with direct contacts Compatible Cameras: Type A EOS cameras (E- TTL, autoflash); Type B EOS cameras (Manual flash) Channels: 4 Flash Ratio Control: For A:B ratio: 1:8 to 8:1, in half- step increments or 13 steps High- Speed Sync (FP flash): Enabled with high-speed sync mode Slave Operation Confirmation: With test transmission button. *Slave A fires followed by slave B at 1/64 output. Flash Exposure Confirmation: Before flash fires during FE lock Adequate flash exposure indicated by the flash exposure level icon lit in the viewfinder. Insufficient flash exposure indicated by the flash exposure level icon blinking in the viewfinder. After flash fires, ST-E2's flash confirmation lamp lights in green for 3 seconds. Wireless slave SE mode cancellation: Cancels when the test transmission button or FE lock button is pressed to turn on the slave unit. Wireless Transmission: Infrared pulse Transmission Range: Indoors: 12-15 meters/39.4 - 49.2 ft; Outdoors: 8-10/ 26.2-32.8 ft Transmission Coverage: ±40° horizontal and ±30° vertical Battery Life: Approx. 1,500 transmissions (At room temperature and with a new set of batteries) AF-assist Beam: Fully compatible with EOS 1V, 3 and 1D's 45-point Area AF and 28mm and longer lens focal lengths. Compatible only with the 5 horizontal AF sensors of the Elan 7E. AF-assist Beam Effective Range: Approx. 0,6 to 10 m/2.0 to 16.5 ft along the periphery (in total darkness). SE Feature: While the power switch is set to I or HOLD, the transmission turns off automatically after about 90 seconds of nonuse. Power Source: 2CR2 lithium (6V) battery x 1 Dimensions: 62 (W) x 51 (H) x 80 (D) mm/2,4 (W) x 3,1 (D) in Weight: 100 g/ 3.5 oz (excluding battery) 1/8/2002 • Updated 6/29/2009 ©Copyright 2002-2009 by Peter Kun Frary • All Rights Reserved	.
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