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Old Nov 30, 2010, 10:25 AM   #1
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Default Jumpy frame during AF

As the title says, when I half press the shutter, the whole frame will jump and to get focus. I'm getting this with the 14-42 kit lens.

Is this a lens or body issue?
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Old Nov 30, 2010, 11:18 AM   #2
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You might want to clarify a little bit:
1. is it just with that particular lens, or do all other lens have the same result?
2. what camera body are you using and does it have image stabilization?
3. does the image then achieve focus and stabilization for the actual shot?

The half shutter press is at an active spot; not only does it institute the automatic focus, but if the body has IS, it also starts the sensor shift to counteract the camera movement.
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Old Nov 30, 2010, 11:25 AM   #3
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Is this the frame as viewed through the optical finder (which camera?), or the back LCD in live view?

When I was using Canon DSLR's the optical finder would do this on the half-press if the in-lens IS system had timed out and had to re-start, but that's not how the Olympus IS system works. It is only active at the moment of exposure.
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Old Nov 30, 2010, 7:33 PM   #4
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What I can say now:

- body is E-620
- I haven't noticed this on my 70-300, but I haven't been looking for it. Will test ASAP
- I see the jumping in the optical viewfinder
- The frame will jump and I'll get focus (usually it will "blur" into focus rather than jump) It's often enough to notice it, but I would say that it ain't @ 100% of the time though.
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Old Dec 1, 2010, 6:01 PM   #5
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Not sure whats going on there and can you get your mits on another body just to test the lenses ?

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Old Dec 1, 2010, 6:34 PM   #6
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Quote:
Originally Posted by TekiusFanatikus View Post
What I can say now:

- body is E-620
- I haven't noticed this on my 70-300, but I haven't been looking for it. Will test ASAP
- I see the jumping in the optical viewfinder
- The frame will jump and I'll get focus (usually it will "blur" into focus rather than jump) It's often enough to notice it, but I would say that it ain't @ 100% of the time though.
Hi Tek,

I may be wrong, but I think that you've got the AF set to C-AF or C-AF-MF. In which case, the C-AF has a habit of 'jumping' ( I call it chattering) instead of smoothly moving from blur to focus. This is especially true when going from a short to long focal distance.

Try S-AF and see what you get.

Zig
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Old Dec 1, 2010, 7:23 PM   #7
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Quote:
Originally Posted by zig-123 View Post
Hi Tek,

I may be wrong, but I think that you've got the AF set to C-AF or C-AF-MF. In which case, the C-AF has a habit of 'jumping' ( I call it chattering) instead of smoothly moving from blur to focus. This is especially true when going from a short to long focal distance.

Try S-AF and see what you get.

Zig
I'm pretty sure I had it a S-AF (never use the C-AF) but I'll try to confirm/make sure for the next while. Thanks for the tip!

Dan
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