Back Button Focus on 5D MK III

canonbabie

canonbabie

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Richard
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Hi,

Something I Noticed Today.

In Settings on Camera I have AF Point Display Enabled.

When Focussed and Shooting with Thumb on the (AF on) Button the Red Square shows in Preview.

When Focussed and Shooting with Thumb off the AF Button it does Not.

Anybody Know Why??, Am I doing Something Wrong, Or is this the Way it Should be,


Regards.
 
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If back button focussing is enabled I would have thought I would only focus (and show the red square) when the back button is pressed. Basically - it sounds like the behaviour I would expect.
 
Like Phil said, it'd be confusing. If you focus recompose, the red square would be showing somewhere other than where you'd focussed.
 
Sorry not trying to Confuse Anyone, I'm talking about the Red square appearing and then Not on the Preview screen after the shot was Taken.

Regards.
 
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My 1D does that but it's because it doesn't focus using the half press on the shutter button therefore it's not focused?
 
I presume we're talking about the rear preview screen and not through the viewfinder?
 
admirable said:
I presume we're talking about the rear preview screen and not through the viewfinder?
Click to expand...

Yes we are.

Shutter button is set to Metering, AF (on) button set to Metering and AF Start. I am taking that when it beeps with finger on back button it's Focussed and then just press the Shutter button to take shot.
 
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mine is set to Metering start/Meter + AF start
 
The red square will only show if the focus is achieved automatically. I don't think it will show if you focus manually.
 
You've lost me now,

canonbabie said:
Hi,

When Focussed and Shooting with Thumb off the AF Button it does Not.
Click to expand...

How are you getting focus without using back button or is it not focused?
 
admirable said:
You've lost me now,



How are you getting focus without using back button or is it not focused?
Click to expand...

I focus with the Back Button the camera Beeps for Focus I then take finger off it and press Shutter Button to take the Shot.
Thats the time the Red Square does not show up on the Preview screen.
 
When it beeps that to tell you that it's focused and which ever focus point you have got active will go red(looking through the view finder)
The preview screen is just that a preview of the shot you have just taken.
You can use canons DPP softwear to see which focus piont was used.


Hope this helps
 
canonbabie said:
I focus with the Back Button the camera Beeps for Focus I then take finger off it and press Shutter Button to take the Shot.
Thats the time the Red Square does not show up on the Preview screen.
Click to expand...

But if you've recomposed, showing the focus point you used would be misleading. Perhaps that's why it doesn't show? I always have it switched off because I can't see the point, it'd rarely be over where I'd focussed.
 
k4stn said:
When it beeps that to tell you that it's focused and which ever focus point you have got active will go red(looking through the view finder)
The preview screen is just that a preview of the shot you have just taken.
You can use canons DPP softwear to see which focus piont was used.


Hope this helps
Click to expand...

You can set it to show on the rear screen what focus point/s were used.
 
admirable said:
You can set it to show on the rear screen what focus point/s were used.
Click to expand...

Thats Correct its only when I take my finger off the back button after it has Focussed and then take the Shot that the Red square does not Show.
 
The AF point in preview will only show if the AF was active when the shot was taken.
 
Ah, that's normal, although I don't understand why you wait so long before pressing the shutter?
 
canonbabie said:
Just to Recompose the shot a Little
Click to expand...
Testing... one....two

Is my mike not working?:D

Phil V said:
But if you've recomposed, showing the focus point you used would be misleading. Perhaps that's why it doesn't show? I always have it switched off because I can't see the point, it'd rarely be over where I'd focussed.
Click to expand...

Phil V said:
Like Phil said, it'd be confusing. If you focus recompose, the red square would be showing somewhere other than where you'd focussed.
Click to expand...

It's designed to not show, because it'd be an inaccurate piece of information.
 
Phil V said:
Testing... one....two

Is my mike not working?:D





It's designed to not show, because it'd be an inaccurate piece of information.
Click to expand...

You do not have to Shout, I've just turned up my Hearing Aid.

Thanks for The Info, glad that's out of the way.


Regards.
 
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