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Author Topic: ST-E2 Speedlite transmitter helping focusing?  (Read 2224 times)

JR

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ST-E2 Speedlite transmitter helping focusing?
« on: October 19, 2011, 08:11:00 AM »
Has anyone tried or used the Canon ST-E2 transmitter (used for wireless flash) to simply help focusing without a flash?

I noticed that focusing on my 5d mk II is always better (even if I shoot the light away from subject) when I use my 580 speedlite.  I read somewhere that because the flash sends a signal first to help focusing, it helps.  I also saw people claiming the transmitter alone which basically fires that beam as well but without the flash can help focusing.

I just find in medium to low light situation my 5D mkII focusing is very eratic...(maybe it is the user!).  I always use the single center focusing point.

Thanks for any input.

JR
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ST-E2 Speedlite transmitter helping focusing?
« on: October 19, 2011, 08:11:00 AM »

Mark D5 TEAM II

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Re: ST-E2 Speedlite transmitter helping focusing?
« Reply #1 on: October 19, 2011, 08:55:05 AM »
Like the Speedlites, the ST-E2 has a red AF assist beam to help the camera AF in low-light. You can use it for that purpose alone.
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JR

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Re: ST-E2 Speedlite transmitter helping focusing?
« Reply #2 on: October 19, 2011, 09:02:25 AM »
So it does indeed help focusing when used alone then.  That's what I was hoping.  If so I will get one for that alone!  Small price to pay to have more shots in focus!  Thanks.
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neuroanatomist

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Re: ST-E2 Speedlite transmitter helping focusing?
« Reply #3 on: October 19, 2011, 09:29:24 AM »
So it does indeed help focusing when used alone then.  That's what I was hoping.  If so I will get one for that alone!  Small price to pay to have more shots in focus!  Thanks.

The ST-E2 just to have something less bulky on your hotshoe?  Because you can configure your 5DII + 580 speedlite so the AF assist lamp on the speedlite fires, but the flash itself does not fire...
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JR

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Re: ST-E2 Speedlite transmitter helping focusing?
« Reply #4 on: October 19, 2011, 04:29:47 PM »
Thanks for the tip Neuro.  I will try that.  But yes having something lighter will be a plus for me, so the transmitter will be of good use!
1DX, 24mm f1.4L II, 35mm f1.4L, 50mm f1.2L, 85mm f1.2L II, 135mm f2L, 24-70mm f2.8L II, 70-200mm f2.8L IS II :  D800, D4, and a whole bunch of Nikon lenses

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Re: ST-E2 Speedlite transmitter helping focusing?
« Reply #5 on: October 20, 2011, 02:49:46 PM »
JR, I've been using a ST-E2 (at least the Younguo version of it) to help my 40D focus in dim light for a while now, and have had great success with it.

The 580 speedlight will have a longer reach with the AF assist, as the assist light is more powerful.

But no doubt, the ST-E2 helps a great deal.

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Re: ST-E2 Speedlite transmitter helping focusing?
« Reply #5 on: October 20, 2011, 02:49:46 PM »