Digital BW, The Print

Hi Richard,

I don't think you will see any difference between a 550EX and a 
580EX on the 1DsMKII.  The 550EX I believe was designed with the 
standard "35mm" frame in mind, and works well with ETTL-II.  The 
ETTL-II is built into the camera, not the flash.  With the 580EX, 
there have been several design changes such as a rotary wheel 
control, slightly more power, etc., but basic flash function is not 
much different than 550EX other than factoring in sensor size when 
used on ETTL-II cameras (currently 20D, 1DMKII and 1DsMKII).  I'll 
know more when I actually have the 580EX and can compare it with the 
550EX.

Tony Bonanno

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Richard" 
<richard@r...> wrote:
> But will a 580EX  show any improvement over a 550EX when used with 
a 1Ds?
> 
> In other words is the ETTL-II a function of the 1DsII or the 
actual 580EX
> Flash unit.
> 
> If it is the flash unit will it detect the sensor size on a 1Ds
> 
> Richard
> 
> -----Original Message-----
> From: Tony Bonanno [mailto:tony@y...] 
> Sent: Friday, November 19, 2004 8:34 PM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Re: Canon 1Ds MK II
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale 
> <stevekale@b...> wrote:
> > Does sound like I should update my flash (430EZ).
> > 
> 
> 
> Sam, Richard, Steve,
> 
> Steve, regarding your flash, yes, to take advantage of the ETTL-
II, 
> I'm pretty sure you'll want one of the EX series flash units.  It 
> will be backwards compatible with your older Canon bodies.  Any of 
> the EX flash units should work fine.  
> 
> The 70-200 2.8L and 28-70L lenses are fine glass and there is 
> absolutlely no reason why you would need to replace them.  
> 
> The full size sensor with 16MP does seem to challenge the wide 
> glass.  There are already reports coming in that even the Canon 16-
> 35L is producing some weird results shooting wide on the 1DsMII.  
> There are lots of theories as to why this is the case (angle that 
> light hits the pixels, etc).  Canon did some serious redesign of 
the 
> pixel shape and microlenses to try to minimze these problems.  I 
> think the jury is still out on this issue.  If I was going to buy 
a 
> wide L lense for the 1DMKII today, it would be the 17-40 f/4 L.  
In 
> my opinion, probably the best "L" wide "zoom" that Canon has 
> produced, although admittedly not as fast as the 2.8 lenses.
> 
> I'm still waiting for my rep to ship the 580EX.  Have used two 
550EX 
> with the ETTL-II on my 1DMKII.  Difference from the old ETTL is 
> dramatic.  ETTL-II doesn't depend on focus point for exposure and 
> actually reads exposure from multiple samples on sensor and 
> calculates distance into algorithm for most EF lenses.  Is much 
more 
> consistent than the old flash.  Doesn't get nearly as confused 
when 
> lots of white or black in frame (major issue for wedding 
photogs.).  
> The new 580 has the added benefit of factoring in the "sensor 
size" 
> to optimize flash exposure further.  It will know if you are 
> shooting with an 20D (APS sensor), a 1DMKII (1.3x), or a 1DsMKII 
> (full size sensor).  Hoping to have my 580EX (and my 1DsMKII) 
early 
> next week.
> 
> Cheers,
> 
> Tony Bonanno
> 
> 
> 
> 
> 
> 
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