Post by Max 400 Dgià....anche io vorrei spendere 100 euro per un flash che sia wireless,
che sia E-TTL II e che abbia un N:G: da 58 metri !
Ok, hai dimostrato che non sai che differenze ci sono tra il 550 e il 580
:P
e invece le so....e le hai appena elencati qui sotto ! :)))
Per la cronaca, il 99% della differenza tra il 580 e il 550 è nelle
dimensioni fisiche e nella disposizione dei comandi sul flash, per il
resto uno ha un NG da 55 e uno da 58, e il 580 ha dei tempi di ricarica
che dovrebbero essere leggermente più rapidi. Entrambi sono E-TTL II,
ovviamente, altrimenti non li avrei neanche comparati :)
e comunque il 580 è già troppo grosso....figuriamoci il 550 su una 400D !
Ah, già che ci siamo: a detta di molti professionisti che con i flash ci
lavorano sempre, i Metz sono migliori dei Canon sotto molti aspetti.
non lo metto assolutamente in dubbio....! :)
qual'è il modello Metz equivalente al 580 EX e che sia in grado di fare da
Master e da Slave ?
La domanda non è se ha le stesse caratteristiche, ma se le due o tre
caratteristiche ("dettagli", più che caratteristiche) che gli mancano sono
cose delle quali tu potrai mai accorgerti.
mi hai appena detto che non può fare da Master......e questa non è una cosa
trascurabile, per quel che voglio fare io !
Qua http://photonotes.org/reviews/sigma-ef-500-super/ c'è una lista delle
differenze con il 550.
Almost, but not quite. Here are the key differences between the two
products.
1.. The 550EX has custom functions; the EF-500 DG Super does not. The
EF-500 DG Super therefore does not provide some of the same options as its
Canon counterpart.
CF 1 disables the auto cancellation of flash exposure bracketing (FEB) at
the end of the three FEB shots. This way you can use FEB for the whole roll
if you want, without having to reset it every time.
CF 2 changes the sequence of FEB to under, normal and over-exposures
instead of having normal first.
CF 3 disables E-TTL and reverts to straight TTL. This is a very useful
option when working with optical slave flash units, which can be triggered
inadvertently by the E-TTL preflash.
CFs 4 and 5 control the amount of time that elapses before save-energy
(SE) mode kicks in while in wireless mode. CF 4 controls whether SE is
engaged after 1 hour or 10 minutes when the flash is in slave mode. CF 5
controls the length of time during which the master flash can wake up the
slave flash - either 1 hour or 8 hours.
CF 6 enables or disables the 550EX's AF assist light.
2.. The 550EX has an AF assist light that covers a very wide area - all 45
focus points of the EOS 3 AF system, in fact. There are two caveats to this.
First, the light does not cover the upper and lower focus points on the Elan
7/EOS 30/33/7 and second, the light is much brighter in the centre of the
coverage area than on the sides.
The EF-500 Super is much more limited in this regard, as its AF assist
light works only with the central focus point on cameras with multiple
points. If you select a side AF point then the camera body's internal AF
assist light kicks in instead.
This isn't a problem with EOS cameras with red AF assist lights built in
such as the Elan II/EOS 50/55 unless the body's internal AF assist light is
blocked by a large lens or lens hood. However it could be an issue when the
flash unit is used with bodies such as the Elan 7/EOS 30/33/7 or Rebel
2000/EOS 300 or pro bodies such as the EOS 3 and 1V, all of which lack
body-integral red AF assist lights.
Note that the EOS 5/A2(E) and 10/10S cameras will not activate the AF
assist light of any external flash unit, but this is a limitation of the
body and not of the flash.
3.. The 550EX does not cancel FP mode (high speed sync) flash unless you
deliberately instruct it to. However, the EF-500 Super inconveniently
cancels FP flash mode if the shutter speed drops to the camera's X-sync
speed or below. And it won't re-enable FP mode until you set the shutter
speed back up above X-sync.
4.. The 550EX is about 1/4 stop more powerful than the EF-500 Super. (the
550EX has a rated metric guide number (GN) of 55 and the EF-500 Super a
rated GN of 50) Which is part of the reason for the faster recycle time (see
point 11) of the EF-500 Super.
5.. The 550EX has an interface that's easier to understand and operate.
The EF-500 Super makes do with fewer buttons but has more menu selections to
do the same job.
6.. The 550EX motorized flash head zooms out to cover a 24mm lens. The
EF-500 Super only covers a 28mm lens. Each flash unit, however, has a
built-in flip-out wide diffuser panel that both makers overrate to 17mm
coverage. And each flash head can zoom to cover a 105mm lens. (note that the
focal lengths and coverage areas mentioned assume the use of a 35mm film
camera)
7.. Flash exposure confirmation is a small LED (light) on the 550EX and a
blinking indicator on the LCD of the EF-500 Super.
8.. The 550EX has a three position power switch - off, on and SE, the 90
second "save energy" timeout mode. The EF-500 Super only has two positions
and is normally in a 90 second power save mode. However, if the Sigma unit
is acting as a master or slave in a wireless setup, or is in optical slave
mode, it will never shut off.
9.. The EF-500 Super can operate as an optical slave unit. (in this mode
the flash unit will trigger in response to any burst of light from another
flash) The 550EX cannot. Unfortunately this mode is limited by the fact that
you must apparently meter the flash output manually.
10.. Wireless ratio control. The 550EX identifies wireless groups as A, B
or C. The EF-500 Super identifies the groups as 1, 2 or 3. Functionally they're
equivalent.
11.. The 550EX has a high voltage socket for using Canon's Transistor Pack
E or their Compact Battery Pack CP-E2. This port is also used by the Turbo,
Mini/Megacycler and Jackrabbit batteries for very fast full power recycles.
The EF-500 Super has no such high-voltage connector. However it does recycle
25-30% faster than the 550EX while using AA batteries.
12.. Some users have reported compatibility problems with the EF-500 Super's
implementation of wireless E-TTL. The 550EX does not have such problems.
13.. The 550EX works with all Canon digital cameras which support EX
series flash units, including the digital point and shoots. Sigma make no
claim that the EF-500 Super will work with Canon's digital point & shoot
cameras such as the PowerShot Pro 90, G1 or G2. It doesn't work correctly
with the G1 or G2. Reports are inconsistent as to whether it works with
Canon's first round of second-generation digital SLRs - the 1D, D30 and D60.
Apparently it does not work correctly with the EOS 10D. Sigma have announced
a DG version of the flash which is digital-compatible (see below).
14.. The 550EX is nicer, has better controls, is solid and reliable, feels
sturdier and is pretty well guaranteed to work with all future Canon cameras
which support E-TTL. The EF-500 Super lacks a few 550EX features, has some
minor incompatibility issues as outlined above (particularly the AF coverage
area problem), has a cheaper-looking boxier case, has a poor reputation for
reliability and may not work with all future E-TTL capable Canon cameras -
but it costs roughly half as much.
emminkia.....!
dici poco ?
--
Max
400D
http://picasaweb.google.it/Max400D