Other lens brands support ETTL - II

[Nuttcraker]

Hi. Could someone answer me this, is ettl II exclusive of canon lens? or other brands like tamron, tokina and sigma support this system, in other words are this lens's capable of sending to the body distance between the camera and the focous subject.

I'm interested in a tokina lens... but i'm used to ettl-II..

Thank you

[eosphotomanoftennessee]

ettl is a flash compatible function, it doesn't matter which brand of lens.

[Nuttcraker]

Hum... if we are talking about ettl II, it matter if the lens support the functions or not.

Tanks
ettl is a flash compatible function, it doesn't matter which brand of lens.

[PacAce]

So far, only Canon lenses provide distance information to the body.

[nadtz]

Not all EF lenses send distance data either IIRC. ETTL II is not exclusive to canon lenses though, but certain functions (like sending distance information) of it are. Also

"Note that E-TTL II does not use distance information when a direct, camera mounted, flash is not used, even with E-TTL II compatible lenses... "
(taken from http://www.bobatkins.com/photography/eosfaq/ettl2.html)

[Curtis N]

So far, only Canon lenses provide distance information to the body.True. And to that I would add:
1) Only some Canon lenses provide this distance info.
2) This info is not required for E-TTL to work, but does improve its consistency.
3) This info is only used for direct flash (not bounced flash).

Lots of people use aftermarket lenses with Canon bodies and E-TTL flash units.

[nadtz]

Isn't that what I said? =)

[PacAce]

Not all EF lenses send distance data either IIRC. ETTL II is not exclusive to canon lenses though, but certain functions (like sending distance information) of it are. Also

"Note that E-TTL II does not use distance information when a direct, camera mounted, flash is not used, even with E-TTL II compatible lenses... "
(taken from http://www.bobatkins.com/photography/eosfaq/ettl2.html)

True. And to that I would add:
1) Only some Canon lenses provide this distance info.
2) This info is not required for E-TTL to work, but does improve its consistency.
3) This info is only used for direct flash (not bounced flash).

Lots of people use aftermarket lenses with Canon bodies and E-TTL flash units.
Yes, that is correct. I should have been a little more specific instead of generalizing by brand only. :)

[Nuttcraker]

Thank you guys. i was thinking in Tokina lens.

[Grentz]

What do you mean by distance information if I may ask?

Do you mean focal length or what? I dont really know what else the lens could provide besides FL and Aperture sicne the lens cannot "see" what it is looking at.

[Jim M]

The lenses that report focus distance to the E-TTL system actually do report the distance they are focused when the picture is made. This tells the flash computing portion of the camera how far away the subject is and allows it to compensate some for extra light and extra dark subjects - at least theoretically.

[Nuttcraker]

What do you mean by distance information if I may ask?

Do you mean focal length or what? I dont really know what else the lens could provide besides FL and Aperture sicne the lens cannot "see" what it is looking at.

Focus distance...

[Gabe63]

What do you mean by distance information if I may ask?

Do you mean focal length or what? I dont really know what else the lens could provide besides FL and Aperture sicne the lens cannot "see" what it is looking at.


I don't know much about the why but my 17-55 shows the correct focal length on my 580ex2. When I zoom the lens I hear a noise from the flash and it shows the new focal length on the screen. Don't know how this helps but it probably does.

[nadtz]

I don't know much about the why but my 17-55 shows the correct focal length on my 580ex2. When I zoom the lens I hear a noise from the flash and it shows the new focal length on the screen. Don't know how this helps but it probably does.

That's not what the OP is referring to, you are talking about the flash head autozooming to accommodate different focal lengths, the OP is referring to the lens sending focus distance information to the camera for factoring into exposure.