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Author Topic: 600EX-RT AF Light Assist  (Read 4703 times)

JRS

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600EX-RT AF Light Assist
« on: September 18, 2013, 12:46:42 PM »
I used to have an canon 580EXII and I remeber that when I choose the central focus point the AF assist light from flash only lights the center (iluminating only the center focus point). When I choose all focus points, the AF assist light illuminates all the focus points.

Now with the 600EX it don't seems to have the same feature, if I choose only the center focus point or all focus point, the AF assist light is the same, iluminating all AF points. Is it right or I have a unit with defect?
Canon 5D3 | 24-105L | 17-40L | 70-300L | 135L | TS-E 24L II | 50 1.4 | 15 2.8 Fisheye | 270EXII | 600EX-RT (x2) | ST-E3-RT

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600EX-RT AF Light Assist
« on: September 18, 2013, 12:46:42 PM »

neuroanatomist

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Re: 600EX-RT AF Light Assist
« Reply #1 on: September 18, 2013, 01:06:22 PM »
Can't speak for the 5DIII, but on my 1D X the 600EX-RT's AF assist lamp lights up only a thin vertical strip if the center AF point is selected.  If I select a point in an off-center column, or in 61-pt auto, the full-width AF assist rectangle illuminates.
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JRS

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Re: 600EX-RT AF Light Assist
« Reply #2 on: September 18, 2013, 01:12:09 PM »
Can't speak for the 5DIII, but on my 1D X the 600EX-RT's AF assist lamp lights up only a thin vertical strip if the center AF point is selected.  If I select a point in an off-center column, or in 61-pt auto, the full-width AF assist rectangle illuminates.

That's how my old 580EXII used to work on my 5D3, I was expecting that the 600EX-RT would work the same.
Canon 5D3 | 24-105L | 17-40L | 70-300L | 135L | TS-E 24L II | 50 1.4 | 15 2.8 Fisheye | 270EXII | 600EX-RT (x2) | ST-E3-RT

polarhannes

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Re: 600EX-RT AF Light Assist
« Reply #3 on: September 18, 2013, 01:16:18 PM »
Can't speak for the 5DIII, but on my 1D X the 600EX-RT's AF assist lamp lights up only a thin vertical strip if the center AF point is selected.  If I select a point in an off-center column, or in 61-pt auto, the full-width AF assist rectangle illuminates.

This also applies for the 5D3. Single point AF centered position = vertical red light beam(a line,not just a small dot), off center position or 61-pt auto = large pattern. I just checked my setup and verified it.
« Last Edit: September 18, 2013, 01:17:57 PM by polarhannes »
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JRS

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Re: 600EX-RT AF Light Assist
« Reply #4 on: September 18, 2013, 01:22:52 PM »
Can't speak for the 5DIII, but on my 1D X the 600EX-RT's AF assist lamp lights up only a thin vertical strip if the center AF point is selected.  If I select a point in an off-center column, or in 61-pt auto, the full-width AF assist rectangle illuminates.

This also applies for the 5D3. Single point AF centered position = vertical red light beam(a line,not just a small dot), off center position or 61-pt auto = large pattern. I just checked my setup and verified it.

So, maybe I have a problem, because I don't have that vertical light beam line when using only the center AF point.
« Last Edit: September 19, 2013, 09:31:46 AM by JRS »
Canon 5D3 | 24-105L | 17-40L | 70-300L | 135L | TS-E 24L II | 50 1.4 | 15 2.8 Fisheye | 270EXII | 600EX-RT (x2) | ST-E3-RT

neuroanatomist

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Re: 600EX-RT AF Light Assist
« Reply #5 on: September 18, 2013, 01:37:22 PM »
Just to confirm, are you in single point selection mode, and not the 4- or 8-point expansion settings?
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JRS

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Re: 600EX-RT AF Light Assist
« Reply #6 on: September 18, 2013, 01:48:32 PM »
Just to confirm, are you in single point selection mode, and not the 4- or 8-point expansion settings?

I'm not with my camera right now, but later I will try again and make sure I'm not making any mistake.
Canon 5D3 | 24-105L | 17-40L | 70-300L | 135L | TS-E 24L II | 50 1.4 | 15 2.8 Fisheye | 270EXII | 600EX-RT (x2) | ST-E3-RT

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Re: 600EX-RT AF Light Assist
« Reply #6 on: September 18, 2013, 01:48:32 PM »

JRS

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Re: 600EX-RT AF Light Assist
« Reply #7 on: September 19, 2013, 09:28:39 AM »
I've checked and I'm using single point selection...



Tried lot of different setting and still can't get the AF vertical beam from flash  :(

I'm using the last firmware version, I will try to downgrade and see if it works.
Canon 5D3 | 24-105L | 17-40L | 70-300L | 135L | TS-E 24L II | 50 1.4 | 15 2.8 Fisheye | 270EXII | 600EX-RT (x2) | ST-E3-RT

neuroanatomist

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Re: 600EX-RT AF Light Assist
« Reply #8 on: September 19, 2013, 09:42:39 AM »
Weird.  Just FYI, the diagram you linked shows Spot AF, not Single AF (I have no idea if that makes a difference, and you may be in Single AF anyway but just found a convenient image on Canon's website). 

Only other thing I'd suggest before calling Canon would be to try resetting the camera to the factory defaults.  Interested to know what Canon says if you call them...
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JRS

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Re: 600EX-RT AF Light Assist
« Reply #9 on: September 23, 2013, 10:12:41 AM »
I finally got the vertical beam.

But now the weird part: I can only get it using the 50mm lens, with the 24-105 I only get the vertical+horizontal beam. Didn't tried other lens yet.
Canon 5D3 | 24-105L | 17-40L | 70-300L | 135L | TS-E 24L II | 50 1.4 | 15 2.8 Fisheye | 270EXII | 600EX-RT (x2) | ST-E3-RT

neuroanatomist

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Re: 600EX-RT AF Light Assist
« Reply #10 on: September 23, 2013, 12:14:02 PM »
I finally got the vertical beam.

But now the weird part: I can only get it using the 50mm lens, with the 24-105 I only get the vertical+horizontal beam. Didn't tried other lens yet.

Odd. I tried it with the lens on my camera at the time, which was the 24-70/2.8L II.
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JRS

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Re: 600EX-RT AF Light Assist
« Reply #11 on: September 23, 2013, 01:22:43 PM »
I finally got the vertical beam.

But now the weird part: I can only get it using the 50mm lens, with the 24-105 I only get the vertical+horizontal beam. Didn't tried other lens yet.

Odd. I tried it with the lens on my camera at the time, which was the 24-70/2.8L II.

Tried with all my lens:

50mm f/1.4 and 135L I have the vertical AF beam assist.

24-105L, 17-40L, 70-300L and 15mm fisheye I have full-width AF assist.
Canon 5D3 | 24-105L | 17-40L | 70-300L | 135L | TS-E 24L II | 50 1.4 | 15 2.8 Fisheye | 270EXII | 600EX-RT (x2) | ST-E3-RT

neuroanatomist

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Re: 600EX-RT AF Light Assist
« Reply #12 on: September 23, 2013, 01:35:07 PM »
So your lenses that give the full AF assist array are all f/4 or slower.  I'll try it on mine with the 70-300L mounted...
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Re: 600EX-RT AF Light Assist
« Reply #12 on: September 23, 2013, 01:35:07 PM »

JRS

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Re: 600EX-RT AF Light Assist
« Reply #13 on: September 23, 2013, 02:17:41 PM »
So your lenses that give the full AF assist array are all f/4 or slower.  I'll try it on mine with the 70-300L mounted...

Yes, except the 15mm fisheye that is f/2.8.

Please let me know when you try with your 70-300L.
Canon 5D3 | 24-105L | 17-40L | 70-300L | 135L | TS-E 24L II | 50 1.4 | 15 2.8 Fisheye | 270EXII | 600EX-RT (x2) | ST-E3-RT

neuroanatomist

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Re: 600EX-RT AF Light Assist
« Reply #14 on: September 23, 2013, 02:23:06 PM »
Yes, except the 15mm fisheye that is f/2.8.

I was thinking of the 8-15mm Fisheye zoom, sorry.  I'll post results...
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Re: 600EX-RT AF Light Assist
« Reply #14 on: September 23, 2013, 02:23:06 PM »