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Problem in autofocus mode nx300m


10 Jul 2020 8:19AM
Hello, does anyone know why the lens of the samsung nx300m keeps making these oscillations
in the footage (back and forth) .Whenever I put it in "autofocus" mode, it seems like she tries to focus on the object, but she can't, so she keeps going back and forth several times.

You can see these oscillations in the video below (seconds 0: 08,0: 29 and 0:52)

https://www.youtube.com/watch?v=4LCSCxi0ZXs&feature=youtu.be

The camera is excellent, but this defect in the focus is terrible and spoils the footage. Does anyone know if it is possible to solve this problem?
I've tried several types of settings and I can't solve this problem. I used 18mm, then zoomed in 24mm, 45mm and lastly 55mm. I changed autofocus from automatic to continuous and etc.
I changed the ISO, increased the lighting, the aperture mode, the zoom, but nothing worked.
Is this a feature of the 18-55mm lens?
If so, do you recommend any other lens that is compatible with the nx300 that does not have this same problem?

Thank you!

Camera specifications:
Nx300m
Lens: 18-55m
Continuous automatic focus
Iso: 1600
1/30
Video shot in a 2mx2m room with four 25w lamps on the ceiling.

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joshwa Plus
9 918 1 United Kingdom
10 Jul 2020 9:53AM
For video, to avoid auto-focus problems, people tend to switch to manual focus modes, or fixed focus, fixed at the beginning of the video. Which is fine if you're recording a still subject. Some cameras will let you fix the focus at the beginning of the video, then use the touch screen to adjust the focus when needed (Panasonic Lumix). A manual focus lens is another option.
sausage Plus
15 666 United Kingdom
11 Jul 2020 8:30AM
The only answer is manual focus. The camera doesn't know what you want in focus.
11 Jul 2020 10:00AM

Quote:The only answer is manual focus. The camera doesn't know what you want in focus.


Thank you. I think there is no solution; Unfortunately this problem in the focus seems to be a feature of the camera.
11 Jul 2020 10:02AM

Quote:For video, to avoid auto-focus problems, people tend to switch to manual focus modes, or fixed focus, fixed at the beginning of the video. Which is fine if you're recording a still subject. Some cameras will let you fix the focus at the beginning of the video, then use the touch screen to adjust the focus when needed (Panasonic Lumix). A manual focus lens is another option.

The problem is that the video I'm making, I need continuous focus. Even so thanks for your help.

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