How to attach a Canon extender!

philthejuggler

philthejuggler

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Phil
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Sounds like a mad question, but I've read some articles that imply that one should always mount the extender to the body before mounting the lens onto the extender.

I'm intrigued to know what difference it could make (especially if the camera is off at the time).

There seemed to be some implication it might affect operation or AF accuracy if you mount the extender to the lens first!

Any thoughts?

Thanks

Phil
 
It's a bit like saying water or milk first in the tea cup!
 
If the camera is off what difference would it make? Having just read the instructions for my nikon Teleconverter (first time too!) it must be a canon thing ;)

It sounds like someone trying to drive traffic to their website.
 
I think the claim was (whichever order it was supposed to be) than it 'initialises the electronics correctly'
 
If camera is switched off then what's the difference? What a load of tosh!!!!



Milk second anyway!
 
philthejuggler said:
Sounds like a mad question, but I've read some articles that imply that one should always mount the extender to the body before mounting the lens onto the extender.

I'm intrigued to know what difference it could make (especially if the camera is off at the time).

There seemed to be some implication it might affect operation or AF accuracy if you mount the extender to the lens first!

Any thoughts?

Thanks

Phil
Click to expand...

The MkIII Extenders should be fitted to the lens first.
 
Apparently so that the lens/extender combination reports correctly to the camera.
 
Tried it both ways without any problems but it is a bit easier, for me, to have the extender on the camera first.
 
Mikesphotaes said:
Tried it both ways without any problems but it is a bit easier, for me, to have the extender on the camera first.
Click to expand...

Yes - I've been testing some extenders over the last couple of days and prefer mounting the extender to the body first.
 
A couple of things to note here;
Firstly, the power to the lens (not the communication) is not removed by powering off the camera, the contacts are still 'live'.
Secondly the MkIII extenders will perform like MkII extenders if they are mounted to the camera before the lens is attached....ie, you will lose some of the improved capability of the MkIII's although they will still function and report correctly if the sequence is reversed.

Bob
 
Canon Bob said:
A couple of things to note here;
Firstly, the power to the lens (not the communication) is not removed by powering off the camera, the contacts are still 'live'.
Secondly the MkIII extenders will perform like MkII extenders if they are mounted to the camera before the lens is attached....ie, you will lose some of the improved capability of the MkIII's although they will still function and report correctly if the sequence is reversed.

Bob
Click to expand...


Thanks Bob - I find it fascinating it should make a difference.

I've been testing a 1.4x III and 2.0x II over the last couple of days and decided I'll probably keep the 2x II for the odd occasion I need more reach from my 70-200 II.

Does that mean it doesn't matter with the MKII's, but the MKIII's will perform optimally if attached to the lens first?
 
The MkIII's gave improved AF performance with some of the more modern lenses (your 70-200 inc) but this will not be available if the extender is attached to the body first.

Here's Canon's advice;
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 then not be able to deduce that a lens has been added to the front of it.

Bob
 
donetello said:
Always been told, teabag milk then water or coffee milk then water apparantly the boiling water destroys the flavour.
Click to expand...
Coffee then milk first with coffee

But with tea put milk in after teabag out
 
Well, you learn something new everyday. Fortunately, I have fluked the right way of doing this for the new 1.4 I acquired a few months ago!
 
Ah well I did say tea bag not in a pot! [emoji1]
 
Canon clearly states that the extender should be fitted to the lens before attaching to the body. Seems logical to follow that advice whether or not doing it the other way around would make any difference.
 
Canon Bob said:
The MkIII's gave improved AF performance with some of the more modern lenses (your 70-200 inc) but this will not be available if the extender is attached to the body first.

Here's Canon's advice;
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 then not be able to deduce that a lens has been added to the front of it.

Bob
Click to expand...

I never knew that! Thanks Bob :)
 
I assumed metadata was being lost between my a7r and 24mm tse due to the metabones adaptor but maybe it was my 1.4x mk III extender.
 
Canon Bob said:
Here's Canon's advice;
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 then not be able to deduce that a lens has been added to the front of it.

Bob
Click to expand...


Complete news to me.. good find Bob.. thanks :)
 
Ha, it just shows you who reads the instructions when they buy their gear :)
 
Canon Bob said:
Here's Canon's advice;
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 then not be able to deduce that a lens has been added to the front of it.
Click to expand...

Well there you go, been doing something right for a change.. Off to tell my wife :D
 
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