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Visible Circular Shape in the Center of Camera Photos Taken Under CFL Lighting

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GabbyWC
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(Last edited by GabbyWC; 10th December 2013 at 03:02 AM.) Reason: Updated Thread Title
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Exclamation Visible Circular Shape in the Center of Camera Photos Taken Under CFL Lighting

I purchased a new 16GB Nexus 5 phone a couple of weeks ago. I'm quite impressed with the phone overall but there's one particular problem I've noticed which concerns me. If I take photos of something light-colored (such as a light switch on my wall) in a room that uses compact fluorescent lighting, there is a faint but visible circular, ring-like artifact in the center of the photos. If I take similar photos in a room that uses incandescent lighting, however, there are no visible artifacts in the photos. I emailed Google about this to troubleshoot the problem and they took me through some routine steps (a power cycle and clearing the camera app's data and cache) but even after a factory data reset did not solve the problem, they ultimately suggested that I exchange the phone for another one at the retailer where I bought it from. Seeing as this problem does not happen in all lighting conditions, I'm not so sure that it's a hardware issue but I'd like to hear from other users as to whether or not they have experienced this. The software on my phone is Android 4.4. I'd like to try out 4.4.1 to see if it addresses this problem but that software update has not been made available to my phone through OTA as of yet. I've experimented with different camera settings and the problem seems to be most noticeable when HDR+ mode is on but it's still there (albeit to a slightly lesser degree) in the regular auto mode. Is it just my unit that's affected by this or is it a more common problem? I tried attaching a photo to this message to show you what I'm talking about but it doesn't seem to upload because of the forum's JPG file size limit.
 
GabbyWC
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(Last edited by GabbyWC; 9th December 2013 at 04:59 AM.) Reason: Added Additional Comments
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I side-loaded the Android 4.4.1 update for my phone and took some new photos to see if this problem still exists. I'm disappointed to see that it's still happening and definitely noticeable with HDR+ mode enabled. There's also a link below to a photo I just took which demonstrates the problem. Do you see the circular / ring-like artifacts on and around the light switch? It's easier to notice if you zoom in.

imgur.com/VSV3ijf

I'm sure I'm not the only person who has taken indoor photos in a room that uses compact fluorescent lighting. Can anyone here quickly take a similar photo and see if the same thing happens or not? I've even gone so far as to buy LED bulbs for my room to replace my CFL bulbs but I'd still like to know whether or not my Nexus 5 phone has a defect.
 
GabbyWC
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The same problem with photos taken under CFL bulbs still exists in Android 4.4.2, unfortunately. There are no such problems under LED or incandescent lighting, however. I'll just have to hope the CFL lighting problems with the camera get addressed in a future update because I'm reluctant to exchange my phone over this if the exact same thing happens on another unit. Has anyone else here encountered this?
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