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DaveG
14th of March 2004 (Sun), 15:21
I was - and still am - excited about the new E-TTL II flash system. Yesterday at a
seminar with a Canon rep I learned a couple of things about it though. First I
was hoping (without much chance of success) that the E-TTL II might be a
firmware upgrade for the 10D. According to the Canon rep it won't be, sigh ...

More troubling is that not all of the Canon EOS lenses will be compatible with
E-TTL II.

If you go to http://www.usa.canon.com/eflenses/pdf/spec.pdf and look at the
left hand column you'll see lenses with two asterisks. They will be the lenses that
are E-TTL II enabled. The rep pointed out that most of the lenses that were not
E-TTL II enabled were very inexpensive and it was doubtful that many people
would put $150 lenses on a $4500 US camera. But some of the non-enabled
lenses are very popular and not particularly cheap including both of the 50 mm
lenses, the f1.8 and the f1.4 and many of the other fixed focal length lenses.

Generally if Canon offers two lenses in a specific focal length, the non
E-TTL II enabled lens is the slower one. For example the 28mm f1.8 is E-TTL II
enabled while the 28 mm f2.8 is not. But the 85 f1.2 is not E-TTL II enabled while
the 85mm f1.8 is, although maybe that’s a typo. In any case consumers should
have a look at the Canon list to see where they stand.

The Canon rep was asked a pointed question about whether third party lenses
would be E-TTL II enabled and he suggested that contacting the lens
manufacturer would be the only way to answer that question.

Tom W
14th of March 2004 (Sun), 15:37
If a lens isn't E-TTL II enabled, what is the consequence? Is it just the distance data that is missing? Will the E-TTL fall back on a generic distance estimate or will it divert to the original E-TTL algorithms?

DaveG
14th of March 2004 (Sun), 15:46
If a lens isn't E-TTL II enabled, what is the consequence? Is it just the distance data that is missing? Will the E-TTL fall back on a generic distance estimate or will it divert to the original E-TTL algorithms?

One presumes that it will revert to E-TTL.

PacAce
14th of March 2004 (Sun), 16:04
From what I've read in other sources, distance data is not a requisite for E-TTL II to work although the algorithm would work that much better is it were available.

DaveG
14th of March 2004 (Sun), 16:12
From what I've read in other sources, distance data is not a requisite for E-TTL II to work although the algorithm would work that much better is it were available.

All I know is that the Canon rep brought it up, so he - and Canon - must have some concerns.

PacAce
14th of March 2004 (Sun), 16:18
Here's where I saw a discussion thread on it.
http://www.robgalbraith.com/ubbthreads/showflat.php?Cat=&Number=215491&page=5&view=collap sed&sb=5&o=&fpart=3&vc=1

And the following is an excerpt of a post from Chuck Westfall:


As promised, here is the updated list of Canon EF lenses that supply distance data to the EOS-1D Mark II for use with E-TTL II:

Lens Distance Information

EF14mm f/2.8L USM
EF20mm f/2.8 USM
EF24mm f/1.4L USM
EF28mm f/1.8 USM
EF35mm f/1.4L USM
MP-E65mm f/2.8 1-5x Macrophoto
EF85mm f/1.8 USM
EF100mm f/2 USM
EF100mm f/2.8 Macro USM
EF100mm f/2.8 Macro*
EF135mm f/2L USM
EF180mm f/3.5L Macro USM
EF200mm f/2.8L II USM
EF200mm f/2.8L USM*
EF300mm f/2.8L IS USM
EF300mm f/4L IS USM
EF300mm f/4L USM*
EF400mm f/2.8L IS USM
EF400mm f/4 DO IS USM
EF400mm f/5.6L USM
EF500mm f/4L IS USM
EF600mm f/4L IS USM
EF1200mm f/5.6L USM

EF16-35mm f/2.8L USM
EF17-35mm f/2.8L USM*
EF17-40mm f/4L USM
EF20-35mm f/3.5-4.5 USM
EF24-70mm f/2.8L USM
EF24-85mm f/3.5-4.5 USM
EF28-70mm f/2.8L USM*
EF28-80mm f/3.5-5.6 USM*
EF28-105mm f/3.5-4.5 II USM
EF28-105mm f/3.5-4.5 USM*
EF28-105mm f/4-5.6 USM
EF28-105mm f/4-5.6
EF28-200mm f/3.5-5.6 USM
EF28-200mm f/3.5-5.6*
EF28-300mm f/3.5-5.6L IS USM
EF35-135mm f/4-5.6 USM*
EF70-200mm f/2.8L IS USM
EF70-200mm f/2.8L USM
EF70-200mm f/4L USM
EF70-210mm f/3.5-4.5 USM*
EF70-300mm f/4.5-5.6 DO IS USM
EF90-300mm f/4.5-5.6 USM
EF90-300mm f/4.5-5.6
EF100-300mm f/4.5-5.6 USM
EF100-400mm f/4.5-5.6L IS USM

EF-S18-55mm f/3.5-5.6 USM
EF-S18-55mm f/3.5-5.6

*Indicates discontinued product

If your Canon EF lens doesn't show up on this list, it does not feed distance data back to the camera through the electronic mount.

As a reminder, distance data is never the only factor that controls flash exposure in E-TTL II. It is an optional data point, no more and no less. E-TTL II remains functional with *all* Canon EF lenses, but when using direct flash, E-TTL II is at its best when distance data is available.

--------------------
Chuck Westfall
Director/Technical Information Dept.
Camera Division/Canon U.S.A., Inc.

Pekka
14th of March 2004 (Sun), 16:29
Without distance data ETTL-II works normally - if distance data is available it will use it. Distance data is only a small part of whole ETTL-II.

Also, Distance information is not used by E-TTL II during bounce flash or wireless flash.

Chuck Westfall quote:

"E-TTL II continues to function well without distance information, especially in regard to identifying the size and location of the subject in the frame, because the flashmetering algorithm is based primarily on preflash data which is registered just milliseconds before each exposure. Also, the EOS-1D Mark II is equipped with a new Custom Function (14-1) that lets the user change the flashmetering pattern from evaluative to averaging. This capability comes in handy when using lenses without distance information if the subject matter is predominantly dark or light."