----- Original Message -----
From: "Francis Zhou" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, September 26, 2006 6:17 PM
Subject: EOS Two questions: PB-E1 vs PB-E2 and ATTL flash for Canon DSLR
My old EOS 650 died on me. I am not ready to take the leap for a 5D but
unwilling to "settle" for a 30D. Instead, I bought a nice used 1N for a
very good price, hoping to get me through a few more years before Canon
FF DSLR price is more affordable. I would really like to match it with a
vertical grip, but there seem two grips (power boosters) 1N can use:
PB-E1 and PB-E2. I understand that PB-E2 is the current one so probably
has 1V equivalent weather seal.
Why can't DSLR maintain backward compatibility with
older TTL modes?
Thank you very much for your help.
Francis
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Hi Francis,
I have a PB-E2 and can't say I've noticed anything special about its
sealing. It takes AA cells as well as a special Canon rechargeable pack for
greater speed. (There's a hidden switch to effect the change-over.) I know
nothing about the PB-E1.
I've understand that digital sensors (or their AA filters) having a mirror
like surface, don't scatter light to the base of the camera (where the
older sensor was placed) as does film. Hence a different type of ETTL was
necessary, and this fires a pre-flash and bases the exposure on light
received by the sensors in the prism housing. ETTL 2 also uses focused
distance info from the lens to help avoid some of the problems with ETTL.
(In my experience, ETTL was nowhere near as good or reliable as the flash
system on my Minolta X700.)
(When you do get ETTL, remember to use your camera on manual exposure
unless you're after help with fill-in flash shots. I keep on forgetting and
then wonder what went wrong! 5D with 550EX etc.)
HTH
Malcolm
Milton Keynes, UK
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