Focus transition Problems with Lumix G9 II

Jens_ac

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Hello.
I asked this question in the Micro For Thirds section 2 weeks ago got no help there. I hope I am at the right place now. I observe 2 problems using focus transition (the video function) with the G9M2 for which I did not find an answer in the manual nor other forums:

1) When I use focus transition I miss always the first 0.3-0.5 seconds of the video, it seems as if the record of the video would start 0.4 s to late or the objective lens starts moving to early. Is that only me or do you also see that effect? This problem is most obvious for fast transition speed (e.g. H). Could you please check and tell me if this is a bug or what I do wrong?

One can put in a delay of 0 or 2 seconds before start but unfortunately not the needed delay of about 0.4-0.5s. So it is difficult for me to time the right moment in scenes with some action – either I miss the first 20-30 frames (0 sec delay) of the video or I miss the right timing because I need to click 1.6s (setting 2 sec delay -0.4s intrinsic delay) secs before action starts…

If someone from Panasonic reads here: In case this is a bug it could be repaired e.g. by putting 0.4 sec as option between 0 and 2 sec. – or an adjustable value in case this delay depends on objective lens type?

2) This second problem is caused by me but I could need help from Panasonic to get it solved: When I do focus transition with the PL100-400 on the G9M2 I hold the lens to better stabilize the camera. Often that results in a tiny change of zoom which deletes my focus transition settings (perhaps the zoom of the PL100-400 is not stiff enough anymore? LOL!!). So I have to set the limits again using the manual focus while action continues and I have to reframe using zoom and I am just screwing the things instead of taking video…
I kindly ask: Could you please stop the reset of the focus transition parameters when zoom is changed? That would help me a lot during video recording especially and fast reframing.

Best regards,
Jens
 
I have done focus transitions many times on my GH5 -- in fact, I have an instructional video about it:

I have done focus transitions just a handful of times on the GH6, and I have yet to try it on the G9m2. I assume that the process to set up a focus transition is the same on the G9m2 as it is on the GH6. (The GH6 has a different set-up process than the GH5, unfortunately.)

All that said, I would only do focus transitions with the camera on a tripod. You definitely can't do it handheld if that means you might accidentally change the zoom/focus on the lens. I recommend using a tripod.

If you have the Focus Ring Control (in the Settings menu on the G9m2) set to "Linear," you can do a pretty smooth and predictable rack focus manually. Using the GH6 with the PL 12-60mm lens, I did a manual rack focus at 5:35 in this video:
 
I have done focus transitions many times on my GH5 -- in fact, I have an instructional video about it:

I have done focus transitions just a handful of times on the GH6, and I have yet to try it on the G9m2. I assume that the process to set up a focus transition is the same on the G9m2 as it is on the GH6. (The GH6 has a different set-up process than the GH5, unfortunately.)

All that said, I would only do focus transitions with the camera on a tripod. You definitely can't do it handheld if that means you might accidentally change the zoom/focus on the lens. I recommend using a tripod.

If you have the Focus Ring Control (in the Settings menu on the G9m2) set to "Linear," you can do a pretty smooth and predictable rack focus manually. Using the GH6 with the PL 12-60mm lens, I did a manual rack focus at 5:35 in this video:
Thank you BobKo for the kind reply.

Could you please do me a favour and test, if you can reproduce the possible bug with your G9ii? The bug, that the record starts to late while focus transition.

A tripod I use in case I have much time for set-up - in that case I want to reframe using zoom in case the animal moved. So the use of a tripod makes it even more urgent, that the focus transition settings should not be erased during zoom. But maybe it is only me with that which. And yes, maybe I should train my manual focus precision so that I do not need to rely on the automatic fuction in the camera anymore - as you suggested. However, I would prefer a bug fix. Therefor, could you please try to reproduce the "late record during focus transition" bug?

Best regards,

Jens
 
Could you please do me a favour and test, if you can reproduce the possible bug with your G9ii? The bug, that the record starts to late while focus transition.
What exactly are you trying to do? Please give me your settings, so that I set my camera the same way.
 
Could you please do me a favour and test, if you can reproduce the possible bug with your G9ii? The bug, that the record starts to late while focus transition.
What exactly are you trying to do? Please give me your settings, so that I set my camera the same way.
Thank you. If you set up focus transition please put position 1 on a thin thing (flower, sign, stick...) close to you and position 2 quite far away. Please set transition to position 2 and speed to H (high speed) and delay to 0. Move to position 1 to have the thin thing in focus. Press shutter button to record the focus transition clip. Please check, if the thin thing at postion 1 is in the clip or if you lost the first 0.4 seconds of the clip, too.

Best regards,

Jens
 
Okay. I have a project to complete this afternoon, but I can possibly work on your test this evening.
 
I did not get a chance to test this last night, but today should be more open for me. Stay tuned.
 

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