Weird lines on some of my images

[Rjhb1977]

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During an event last week, I took some pictures of watches (inside a boutique) and I noticed some have horizontal lines, others have vertical lines. I didn't touch any settings on my Q3 compared to images I took before these (which look fine). Any idea what causes this and how I prevent it next time?

 

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[jaapv]

LED lighting? 

[frame-it]

1 hour ago, Rjhb1977 said:

During an event last week, I took some pictures of watches (inside a boutique) and I noticed some have horizontal lines, others have vertical lines. I didn't touch any settings on my Q3 compared to images I took before these (which look fine). Any idea what causes this and how I prevent it next time?

 

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if its from the lighting, just change the shutter speed till they're gone

[Rjhb1977]

13 minutes ago, jaapv said:

LED lighting? 

That could be the case indeed! 

[Rjhb1977]

9 minutes ago, frame-it said:

if its from the lighting, just change the shutter speed till they're gone

Thanks! I have one shot that I took after this one, that does not show the stripes. Let me check whether it had a different shutter speed (I should have come up with that myself...)

[LocalHero1953]

Were you using electronic or mechanical shutter? The Q leaf shutter should not do this with artificial lighting.

[Rjhb1977]

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17 hours ago, LocalHero1953 said:

Were you using electronic or mechanical shutter? The Q leaf shutter should not do this with artificial lighting.

Electronic.

[Rjhb1977]

18 hours ago, frame-it said:

if its from the lighting, just change the shutter speed till they're gone

I checked and the image I took after which doesn't show the lines, had a slower shutter speed (1/50th instead of 1/125th), and a lower ISO (250 instead of 500). But I guess it is the shutter speed indeed.

[LocalHero1953]

4 hours ago, Rjhb1977 said:

Electronic.

Then it's the electronic shutter sequential sensor read-out interfering with the frequency of flickering of artificial lights. And yes, you can mitigate it by selecting a different electronic shutter speed, and avoid it by selecting the mechanical shutter (because the latter doesn't have a sequential read-out).