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Did the lense suffered any water recently. Has the phone been fully sumerges in water recently.
 
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Did the lense suffered any water recently. Has the phone been fully sumerges in water recently.

Nope. Lenses good. Water-free. Zero drop too.
 
Maybe I'm a bit too amateur on my photo skills buuuuutttt where's the watermark?

Yeah I thought my eyesight was going as well ... I don't see anything wrong with the picture.

Op, are you mistaking the green beyond the trail of lights above and bottom left hand corner as a water market when it's felt? Or are you using some photo software or upload software app installed that maybe causing this? If so disable auto upload on all said apps and also check if opening a picture or seeing the same pictures in Apple's own Photos app.
 
How would a watermark just appear in a photo? Aren't they placed there by the photographer to prevent use or whatever?
 
OP asked about a watermark, so there must be one, either on the picture, or on the screen. Either way, the OP could take a picture of the iPhone, with the screen showing the "watermark".

I don't have a 7 plus.
Does the portrait mode (bokeh effect) show something on the screen that might be interpreted as a "watermark" when you zoom in?
 
Well, this is a better taken photo. If u zoomed into the subjects, especially the faces, those details are off & appeared like painted photos. I will upload a few more later.
 
Well, this is a better taken photo. If u zoomed into the subjects, especially the faces, those details are off & appeared like painted photos. I will upload a few more later.

Ah, the Monet watercolour effect. This has been a 'feature' of iPhone cameras for a couple of generations now and yes, they all do it. To be fair my Xperia XZ does it too and it's a symptom of trying to get too much out of a tiny sensor and lens. Zooming in these days is a bad idea as it just shows grain and, occasionally, the watercolour effect you're mentioning.
 
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Ah, the Monet watercolour effect. This has been a 'feature' of iPhone cameras for a couple of generations now and yes, they all do it. To be fair my Xperia XZ does it too and it's a symptom of trying to get too much out of a tiny sensor and lens. Zooming in these days is a bad idea as it just shows grain and, occasionally, the watercolour effect you're mentioning.
Meaning to say it's hardware issue & no software update can correct it?
I don't see such poor quality photos with heavily pixelated edges on my previous 6s plus & s7edge.
 
Meaning to say it's hardware issue & no software update can correct it?
I don't see such poor quality photos with heavily pixelated edges on my previous 6s plus & s7edge.

Apple could alter the software but it's quite possible that this issue is baked into the hardware.
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It's not a hardware issue. It's intentional.

Not intentional as such, more unavoidable.
 
I don't pretend to be a photog. Wouldn't you avoid that issue by taking more care when you are composing your initial picture? Zoom in at the time you take the picture, rather than cropping through a later edit.
 
It's aggressive noise reduction to hide the grain that would appear otherwise from such a small sensor in low light, especially chromatic noise. The annoying thing with the iPhone is it seems to apply noise reduction to pretty much all photos, even outside in good light. Apple should really give an option to turn it on and off, that would be ideal.
 
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