Digital BW, The Print

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@...] 
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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