Override AF with DA 50-200?

DMH · 09-29-2007, 03:06 PM

I keep reading about the quick override feature of the SMC FA 50-200mm lens using a "quick twist". I've been overriding using the OK button.

How does this feature work with the lens?

David

SpecialK · 09-29-2007, 09:36 PM

Page 10/11 of the lens manual explains both the operation of the OK button and the quick twist manual focus. In autofocus mode, you use the manual focus ring to adjust it.

SupremeMoFo · 09-29-2007, 10:10 PM

Quick shift focus is allowing the camera to focus, then with the shutter button still held down half way with your right hand (which also must take the weight of the camera) using your left hand to adjust the focus ring. You can't make it focus, release the shutter button from halfway, adjust focus, then take the photo because it will likely readjust the focus before it takes the photo. I rarely use it, I usually do it when using the DA16-45 at 16mm where focus accuracy is poor, so I set it to the right infinity point then forget about it - good for landscapes.

DMH · 09-30-2007, 05:30 PM

Thanks for the reply. So it is similar to using the OK button to disengage AF if you have it set to MF.

SupremeMoFo · 10-01-2007, 06:52 AM

Ehh... sort of.

09-29-2007, 03:06 PM	#1
DMH Inactive Account Join Date: Sep 2007 Location: Toronto, Canada Posts: 25	Override AF with DA 50-200? I keep reading about the quick override feature of the SMC FA 50-200mm lens using a "quick twist". I've been overriding using the OK button. How does this feature work with the lens? David

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09-29-2007, 09:36 PM	#2
SpecialK Pentaxian Join Date: Dec 2006 Location: So California Photos: Gallery Posts: 16,480	Page 10/11 of the lens manual explains both the operation of the OK button and the quick twist manual focus. In autofocus mode, you use the manual focus ring to adjust it.

09-29-2007, 10:10 PM	#3
SupremeMoFo Veteran Member Join Date: Mar 2007 Location: Queensland, Australia Posts: 668	Quick shift focus is allowing the camera to focus, then with the shutter button still held down half way with your right hand (which also must take the weight of the camera) using your left hand to adjust the focus ring. You can't make it focus, release the shutter button from halfway, adjust focus, then take the photo because it will likely readjust the focus before it takes the photo. I rarely use it, I usually do it when using the DA16-45 at 16mm where focus accuracy is poor, so I set it to the right infinity point then forget about it - good for landscapes.

09-30-2007, 05:30 PM	#4
DMH Inactive Account Join Date: Sep 2007 Location: Toronto, Canada Posts: 25 Original Poster	Thanks for the reply. So it is similar to using the OK button to disengage AF if you have it set to MF.

10-01-2007, 06:52 AM	#5
SupremeMoFo Veteran Member Join Date: Mar 2007 Location: Queensland, Australia Posts: 668	Ehh... sort of.

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