Using new Canon converter with new lenses

[Charles Glatzer]

FYI- You all may find this of intertest regarding the new converters and there use with the new telephotos and the new 70-200 f/2.8IS II

From Canon...

"To achieve the maximum benefits of this new processor, you need to ensure that you attach the lens to the Extender first, and then attach the whole lens and extender combination to the camera. This way the camera will see a combined "Lens + Extender". If you add the extender to the camera first the camera will recognise it, but will the newnot be able to deduce that a lens has been added to the front of it."

Additional info on the new converters and the new IS functionality can be found here

Best,

Chas

[arash_hazeghi]

humm.. it doesn't sound right, the camera cannot detect the lens if the converter is already attached? in that case what does it think it is shooting with??? a naked TC and no lens?

I just tried my 1.4 III with 70-200II, TC attached to the body, then attached the lens. everything works.


your link seems broken. I think you linked to a document on your machine.

[Charles Glatzer]

humm.. it doesn't sound right, the camera cannot detect the lens if the converter is already attached? in that case what does it think it is shooting with??? a naked TC and no lens?

I just tried my 1.4 III with 70-200II, TC attached to the body, then attached the lens. everything works.


your link seems broken. I think you linked to a document on your machine.

Here is the link

http://cpn.canon-europe.com/content/...est_ef_lens.do

Mico-AF adjustment lens recognition works either way...putting the converter on the body first or lens first it reads and holds adjustment settings.

Chas

[arash_hazeghi]

Here is the link

http://cpn.canon-europe.com/content/...est_ef_lens.do

Mico-AF adjustment lens recognition works either way...putting the converter on the body first or lens first it reads and holds adjustment settings.

Chas

yes, I think this is a translation error or something like that, I have seen errors on Canon EU site before, otherwise sounds like a very stupid firmware bug.

[John Chardine]

I don't think this is new advice. Way before the new TCs came out I had read from Canon that you should attach the TC to the lens first, then mount the whole thing on the body.

[Charles Glatzer]

I don't think this is new advice. Way before the new TCs came out I had read from Canon that you should attach the TC to the lens first, then mount the whole thing on the body.

I do not think the older converters had "integrated processors" as do the newer editions.

Chas

[Dave Leroy]

" However, the biggest change is within the electronics of the extenders. Both models feature integrated processors to collate and transfer all the information from the lens back to the camera. This includes data about focal length, focus distance and Image Stabilization. The advantage of this is that the camera can adjust settings like AF Microadjustment (if you are using it) to suit the combination of lens and Extender. It also means the AF performance when using extenders is improved compared to the previous generation of extenders when used with earlier generations of Canon telephoto lenses."

The above is a quote from the site Chas referred to.
I have the older Canon 1.4 II extender. The instructions are clear to first install extender on lens and then combo on camera and reverse order on removal. My 7D recognizes the different MA for my 500mm or for 500 plus 1.4 ET.

Perhaps it is part sales talk and that some of the technical things have not changed.

Dave

[John Guastella]

I've attached and detached my 1.4X extender MarkII, 500mm f/4 IS, and 7D using every possible combination and have never observed a problem with basic function nor with the ability of the camera to recognize the AF microadjustment value (0 for the bare lens; -6 for the lens plus extender combo).

John

[David Stephens]

I've attached and detached my 1.4X extender MarkII, 500mm f/4 IS, and 7D using every possible combination and have never observed a problem with basic function nor with the ability of the camera to recognize the AF microadjustment value (0 for the bare lens; -6 for the lens plus extender combo).

Me too. I think the procedure is new and relevent to the new Series III TCs.

[William Malacarne]

It tells about this in the manual

you can go here and then download the manual

http://www.usa.canon.com/cusa/suppor...uresAndManuals

it also says the same in the III manual

It also says not to stack TC's.......


Bill

[Kaustubh Deshpande]

Very interesting.

First question that comes to mind is 'what happens when the camera is off when attaching the rig and then turned on?' how would the order of what was attached first matter? Wouldn't that be a moot point?

So is this new suggestion from Canon only relevant if camera is on while attaching the rig? I guess so.

[John Chardine]

Hey KD- For the record, it's not a new recommendation. I can dig out the pdf manual for my 1.4 tc II if you like. See Dave's post above as well.

[Kaustubh Deshpande]

Hey KD- For the record, it's not a new recommendation. I can dig out the pdf manual for my 1.4 tc II if you like. See Dave's post above as well.

got it. thx.

[Deepak Brid]

'what happens when the camera is off when attaching the rig and then turned on?' how would the order of what was attached first matter?

I kind of agree with KD, John G & Dave. Isn't it recommend to turn off the power on the cam body before we make any changes to the lens + body configurations? Reason could be contributed to - static charge on sensor can possible attract dust particles quicker, malfunction, etc.

If that's true, it shouldn't matter where the TC goes first. The TC too isn't powered in anyway for it to recognize if it was the Lens or the body(if not on) that it was first connected too...

I currently use the 1.4x III with 300mm f/4.

[Deepak Brid]

It also says not to stack TC's.......

Sure there is a physical restriction in stacking the mark III TC's... I think Canon has done it intentionally... Though I'm not sure if one can stack a the Mark II TC's with Mark III ones..