Video de Demostración
NOTA: El equipo incluido es el indicado en la descripción del producto. Accesorios en el video pueden ser solamente para fines demostrativos.
Descripción del fabricante
Description
 It is common knowledge that one of the worst places to
fire a flash from is the hotshoe of your camera. This can result in glare,
red-eye, and/or harsh shadows if there is a wall behind the subject.
In some situations this is the only option. To improve the shortcomings of a
hotshoe-mounted flash you can add some kind of a diffuser to your flash unit or
bounce the flash off a wall or ceiling, but even bounced flash can result in
harsh shadows.
The alternative is to move the flash unit away from the lens axis. This can be
done either with a bracket attached to your camera or mounting the flash on a
lightstand. To trigger the flash once it is off the camera you can use a simple
synch cord.
Alternative, if you don't want to use a cord, you can use a wireless or infrared
device to trigger the flash. The Canon ST-E2 is simply Canon's infra-red device
to trigger flash units mounted off camera.
I bought an ST-E2 when I started getting interested in lighting but it was a
poor buy for reasons I will outline below. The unit only works with certain
Canon flash units that can be set as Slave units. I use mine with a Canon 550EX.
Check first to make sure that your flash can be used as a Slave with the ST-E2.
If it can, there will be a switch than can be set to 'Slave', 'Master', or
'Off'.
 After buying the ST-E2, I bought a complete budget studio
lighting kit (three strobes, three light stands, two umbrellas, and everything
else that is required) which cost me less than the ST-E2 alone. Once you get
into off-camera lighting it needs several components, and the infra-red
triggering device is just one component of course.
If you start buying everything separately (extra Canon flash units, lightstands,
umbrellas, brackets, etc.), it starts to get very expensive. The kit I bought
does a great job and it worked out at a fraction of the price.
The ST-E2 is dedicated to the Canon flash system, of course, and does offer some
advantages over a cheap studio lighting kit. It allows you to retain E-TTL
II/E-TTL exposure control so that the flash unit/s pump out just the amount of
light. With my studio kit I just get a fixed amount of light and have to think a
lot more about exposure settings.
The proprietary Canon system is all battery powered and completely portable.
This means you can use it in the middle of a field, but for my lighting kit I
need AC power. On the other hand, batteries run out and battery-powered flash
units can't produce as much light as AC powered lights.
The ST-E2 will trigger all flash units set as Slaves that are within range (the
range is about 15m indoors according to Canon's specifications). To prevent
unwanted firing when two or more ST-E2's are being used in close proximity, each
device can be set to a different one of four channels: A to D.
Slave units can be designated as A or B. An A:B flash ratio can then be set on
the ST-E2 to vary the output between A flash units and B ones (1:8 to 1:1 to
8:1). The idea of this is to create lighting that isn't flat and boring. With my
studio lights I can't do anything like this and have to physically move the
lightstands to achieve the same effect.
Compared to a budget studio lighting kit then, the advantages of the ST-E2
system are portability, flexibility with lighting adjustments, and the ability
to retain E-TTL II/E-TTL.
The disadvantages are cost and relatively low power.
The ST-E2's infrared output also doubles as a focus-assist device. I don't
suffer from any focusing problems but I have heard of this device being used
just to assist focus, rather than for its intended purpose.
The unit is powered by a single 2CR5 lithium battery which should be good for
around 1,500 transmissions.
Details
Weight: 3.5oz; 99g (without battery)
Battery: 2CR5 (weight 1.6oz; 45g); 6 volts; approx. 1,500 transmissions
Working range: 39ft to 49ft (indoors); 26ft to 32ft (outdoors)
Date Purchased: July 2006
Supplier: Fotofile, Bangkok, Thailand
Price: 10,220 Thai Baht
Soft Case: LP811 (included)
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Flash |
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|
Type |
550EX-dedicated, clip-on Speedlite transmitter with direct contacts |
|
Compatible Cameras |
Type A EOS cameras (E- TTL, autoflash); Type B EOS cameras (Manual flash) |
|
Sync Speed |
High-Speed Sync (FP flash): Enabled with high-speed sync mode |
|
Flash Exposure Confirmation |
1. 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.
2. After flash fires ST-E2's flash confirmation lamp lights in green for 3 sec. |
|
AF Assist Beam |
Compatible with EOS-3's 45-point Area AF and 28mm and longer lens focal lengths
Effective Range: Approx. 0.6 to 10m/2.0 to 16.5 ft along the periphery (in total
darkness). |
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Wireless Functions |
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Transmission System |
Infrared pulse |
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Transmission Range |
Indoors: Approx. 12-15 m/39.4 - 49.2 ft; Outdoors: Approx. 8-10 m/ 26.2-32.8 ft |
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Flash Ratio Control |
For A:B ratio: 1:8 to 8:1, in half- step increments or 13 steps |
|
Flash Coverage |
Transmission Coverage: +/-40 degrees horizontal and +/-30 degrees vertical |
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Slave Operation Confirmation |
With test transmission button.
*Slave A fires followed by slave B at 1/64 output. |
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Slave Unit SE Mode Cancellation |
Cancels when the test transmission button or FE lock botton is pressed to turn
on the slave unit. |
|
General |
|
|
Power Source |
2CR5 lithium battery x 1
Battery Life: Approx. 1,500 transmissions (At room temperature and with a new
set of batteries) |
|
SE Mode |
While the power switch is set to I or HOLD, the transmission turns off
automatically after about 90 sec. of non-use. |
|
Dimensions |
62 (W) x 51 (H) x 80 (D)mm/2.4 (W) x 3.1 (D) in |
|
Weight |
100g/3.5 oz (exluding battery) |
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