Camera quality on my Xperia Z is great apart from the corners of each picture (especially the top corners), which are always very blurred compared to the rest of the image. I've tried all sorts of different settings, seems to make no difference.
Does anyone know if this is just the way things are with the Z, or a defect which they might fix/replace under warranty?
Post pictures taken from your cam.
kdavidyates said:
Camera quality on my Xperia Z is great apart from the corners of each picture (especially the top corners), which are always very blurred compared to the rest of the image. I've tried all sorts of different settings, seems to make no difference.
Does anyone know if this is just the way things are with the Z, or a defect which they might fix/replace under warranty?
Click to expand...
Click to collapse
The design of lenses have this inherent fault, corners are always more soft than the center.
However post some shots so we can see, because if you are claiming that they are very blurred it would be good help diagnose if the quality does seem worse than the norm. Also double check that the lens is in fact clean all over.
kdavidyates said:
Camera quality on my Xperia Z is great apart from the corners of each picture (especially the top corners), which are always very blurred compared to the rest of the image. I've tried all sorts of different settings, seems to make no difference.
Does anyone know if this is just the way things are with the Z, or a defect which they might fix/replace under warranty?
Click to expand...
Click to collapse
Here since 2009 and still don't know how to read:silly:
http://forum.xda-developers.com/showthread.php?t=2116920
Dsteppa said:
Here since 2009 and still don't know how to read:silly:
http://forum.xda-developers.com/showthread.php?t=2116920
Click to expand...
Click to collapse
Ok thanks for the heads-up but I could just as easily have posted this as a thread (i.e. 'Possible camera defect', and without the 'Q'). I wasn't aware of the restriction on questions here.
Let me rephrase: "It seems to me that there's a defect with my camera which blurs the corners of pictures. Does anyone else have a similar experience with their camera?" (Or does that count as a question too?)
Here are some links to pictures, anyway, assuming the thread doesn't get deleted (and thanks to those who posted asking for them):
As long as there's nothing in the top corners, it takes really nice pictures:
https://www.dropbox.com/s/zww62ysjtsicr1v/2013-06-06 10.52.43.jpg
https://www.dropbox.com/s/4r3lzcdeuuk7rb0/2013-07-20 19.34.35.jpg
But these three (taken to test for this fault) clearly show blurring in the top corners (comments on whether this is excessive are welcome):
https://www.dropbox.com/s/8odsgf5xdkpld5f/2013-04-20 17.55.15.jpg
https://www.dropbox.com/s/xs3r79awos2dc65/2013-04-20 17.56.42.jpg
https://www.dropbox.com/s/5um2bst8i2tgji5/2013-05-07 14.00.20.jpg
I have the same problem. When I'm holding the phone in landscape mode, the left corners are also very blurry.
I experienced the same problems with my Xperia Neo, but in contrast to the Xperia Neo, the Xperia S didn't had that problem.
I'm very disappointed in Sony, because I have more problems with my Z
Sent from my C6603 using xda app-developers app
Bump - does anyone else experience blurring in the top corners of their pictures? Thinking about returning under warranty, as I use the camera quite a lot. Sample photos linked below...
As long as there's nothing in the top corners, it takes really nice pictures:
https://www.dropbox.com/s/zww62ysjtsicr1v/2013-06-06 10.52.43.jpg
https://www.dropbox.com/s/4r3lzcdeuuk7rb0/2013-07-20 19.34.35.jpg
But these three (taken to test for this fault) clearly show blurring in the top corners (comments on whether this is excessive are welcome):
https://www.dropbox.com/s/8odsgf5xdkpld5f/2013-04-20 17.55.15.jpg
https://www.dropbox.com/s/xs3r79awos2dc65/2013-04-20 17.56.42.jpg
https://www.dropbox.com/s/5um2bst8i2tgji5/2013-05-07 14.00.20.jpg[/QUOTE]
kdavidyates said:
Bump - does anyone else experience blurring in the top corners of their pictures? Thinking about returning under warranty, as I use the camera quite a lot. Sample photos linked below...
As long as there's nothing in the top corners, it takes really nice pictures:
https://www.dropbox.com/s/zww62ysjtsicr1v/2013-06-06 10.52.43.jpg
https://www.dropbox.com/s/4r3lzcdeuuk7rb0/2013-07-20 19.34.35.jpg
But these three (taken to test for this fault) clearly show blurring in the top corners (comments on whether this is excessive are welcome):
https://www.dropbox.com/s/8odsgf5xdkpld5f/2013-04-20 17.55.15.jpg
https://www.dropbox.com/s/xs3r79awos2dc65/2013-04-20 17.56.42.jpg
https://www.dropbox.com/s/5um2bst8i2tgji5/2013-05-07 14.00.20.jpg
Click to expand...
Click to collapse
[/QUOTE]
I'd say send it back, must be a hardware failure.
I'll be sending mine back for dead pixels on the damn sensor. New sensor so lots of problems.
kdavidyates said:
https://www.dropbox.com/s/zww62ysjtsicr1v/2013-06-06 10.52.43.jpg
https://www.dropbox.com/s/4r3lzcdeuuk7rb0/2013-07-20 19.34.35.jpg
But these three (taken to test for this fault) clearly show blurring in the top corners (comments on whether this is excessive are welcome):
https://www.dropbox.com/s/8odsgf5xdkpld5f/2013-04-20 17.55.15.jpg
https://www.dropbox.com/s/xs3r79awos2dc65/2013-04-20 17.56.42.jpg
https://www.dropbox.com/s/5um2bst8i2tgji5/2013-05-07 14.00.20.jpg
Click to expand...
Click to collapse
I do not see really problems with this, I am sure it is a slight misalignment of the lens, this happens on P&S cameras, they are typically worse than this in all corners. This effect even happens on some of the most expensive DSLR lenses, the more wide angle typically worse the issue.
If you can get the whole phone replaced because of this then you will be extremely lucky.
I've just been running some tests on my Z1 camera.
I noticed that it's virtually unable to produce straight lines.
I've attached a picture of my PC's monitor (in admittedly difficult light) and as you can see the normally straight lines of the bezel and windows all bulge.
Does anyone else have that issue? Is my camera a duff one?
I'm extremely hesitant to send it in to Sony for repair. Currently they have my old Xperia Z for repairs, to replace the camera module that developed black spots. It's been three weeks and still waiting for it to come back (UK repair centre).
It's those kind of issues that make choosing a Sony extremely frustrating, as much as I want to love the brand.
It's.from the lens of the camera. If someone else's camera doesn't show that aberation you should go to Sony. Only way to get it right is post processing every picture.
Sent from my C6802 using XDA Premium 4 mobile app
For comparison I took some shots with an old 350D, with kit objective (18-55mm).
One shot with at 18mm, one at 55mm, one with my Z1 and one with an old Xperia Pro.
350D:
18mm IMG_1805
55mm IMG_1806
Z1:
DSC_0111_
Xperia Pro:
DSC_1426
Exry said:
For comparison I took some shots with an old 350D, with kit objective (18-55mm).
One shot with at 18mm, one at 55mm, one with my Z1 and one with an old Xperia Pro.
350D:
18mm IMG_1805
55mm IMG_1806
Z1:
DSC_0111_
Xperia Pro:
DSC_1426
Click to expand...
Click to collapse
Your Z1 is also quite bumpy, not perhaps not as much as mine.
naujoks said:
Your Z1 is also quite bumpy, not perhaps not as much as mine.
Click to expand...
Click to collapse
Although I don't know how much of distortion is acceptable, it's probably because of the very low focal length and wide angle? I'm no photographer but I expected it to bulge a bit.
yeah i mentioned this in the camera thread in the general section. every Z1 i've tested does this (10+ phones plus every image i've seen of a grid or line from the z1 on this forum). depending on the way the lense is mounted most deformation will normally appear towards the extreme top or bottom of an image.
ps. if you bought your phone from a uk network and are outside of your in store exchange period and wanted to get it repaired (not that i think there are any current z1's without this problem and therefore a lense that would be much better to be put into your phone) than send it through the network shop for a warranty repair and it will be repaired or replaced by anovo (all network shops use them) in around 5 working days.
That´s not unexpected.
If you make a wideangle lens this small there will be always quite a lot of distortion. Almost all cameras nowadays correct this distortions in the image-processing.
The problem is that the optical distortion changes with very close focus-distances and most software-corrections only adjust to the lenses focal-length (when having a zoom-lens), but not to the focus-distance, so the software-correction is wrong.
It seems that Sony does a combination of optically correcting the distortion in the lens, additionally to the software-corrections, which causes this very complex distortion, which quite strong pincushion-distortion in the center while still having some barrel-distortion at the edges of the image.
In distances 1m+ there is hardly any visible distortion left.
*R2D2* said:
That´s not unexpected.
If you make a wideangle lens this small there will be always quite a lot of distortion. Almost all cameras nowadays correct this distortions in the image-processing.
The problem is that the optical distortion changes with very close focus-distances and most software-corrections only adjust to the lenses focal-length (when having a zoom-lens), but not to the focus-distance, so the software-correction is wrong.
It seems that Sony does a combination of optically correcting the distortion in the lens, additionally to the software-corrections, which causes this very complex distortion, which quite strong pincushion-distortion in the center while still having some barrel-distortion at the edges of the image.
In distances 1m+ there is hardly any visible distortion left.
Click to expand...
Click to collapse
That's very interesting and the most insightful reply on this topic in any thread yet, thanks. My only concern is that i have read a report of a picture of a horizon have both the barrel distortion and pincushion problems which is at some distance. I'll have to check for long distance distortion. If it's not there i'm happy.
Thanks for the replies!
On top of the above problem I also noticed a distinct out of focus area (top left corner in my case) in shots taken at a wide distance.
I can't say I every detected either of these problems on my old iPhone 5. Maybe Apple's camera is simply better and the algorithms even things out more.
I'm currently having the Z1 and the Galaxy Note 3 at home and try to decide which one to keep, and it's proving very difficult. Both phones have their distinct positive and negative sides.
naujoks said:
Thanks for the replies!
On top of the above problem I also noticed a distinct out of focus area (top left corner in my case) in shots taken at a wide distance.
I can't say I every detected either of these problems on my old iPhone 5. Maybe Apple's camera is simply better and the algorithms even things out more.
I'm currently having the Z1 and the Galaxy Note 3 at home and try to decide which one to keep, and it's proving very difficult. Both phones have their distinct positive and negative sides.
Click to expand...
Click to collapse
the bottom right side of my pictures are blurred. gsmarena had a similar issue with their test unit.
Today I conducted some more tests with both Z1 and GN 3.
At 100 ISO the Z1 showed considerable noise and much less in focus than the GN3, in good light.
At first I thought that the Z1 camera complaints might be not so visible to the untrained eye and that the average user such as myself wouldn't notice anything amiss, but the differences in direct comparison are really striking.
There are many things I like about the Z1, and its design is far superior to the GN 3, but knowing that there are virtually no conditions under which the Z1 would be able to take good pictures is a deal break for me, so the Z1 will go up on eBay. Hopefully better luck in 6 months with the Z's next iteration.
naujoks said:
At 100 ISO the Z1 showed considerable noise and much less in focus than the GN3, in good light.
Click to expand...
Click to collapse
I think Sonys decision not to kill all detail with heavy noise-reduction was a good (although unexpecting when looking at their cameras which usually use quite heavy NR). Chroma-Noise is very well under control up to the highest sensitivities and the luminance-noise is very fine grained and not objectionable at all. Unfortunately thats not true for ISO 1600+, where NR gets so high everything becomes a blurry mess. Of course these sensitivities are hardly usable for 1/2,3"-Sensors, regardless of the strength of the NR
Finally you can always use some additional NR in PP, but you never can bring back detail that has already been destroyed by heavy processing.
Also contrast (at least in manual) mode is quite low (at least for a consumer-device), which leads to surprisingly good DR, unlike the blocked shadows (which also hide noise) you get on most phones (and most compact-cameras as well). Again increasing contrast in PP is not a problem, unlike the other way around.
I just hope this won´t change with future Firmware-updates.
Of course there will be less in focus as well, a bigger sensor + larger aperture means less DOF and therefore less in focus.
This can also become a problem at close focus-ranges, because the focus-plane is in reality not flat, instead it is somewhat spherical shaped. At close focus-distances therefore soft corners can become a problem.
demoniality said:
My only concern is that i have read a report of a picture of a horizon have both the barrel distortion and pincushion problems which is at some distance. I'll have to check for long distance distortion. If it's not there i'm happy.
Click to expand...
Click to collapse
I've taken pictures of a sea horizon...
They get the strange distortion too
---------- Post added at 11:29 PM ---------- Previous post was at 11:20 PM ----------
*R2D2* said:
I think Sony's decision not to kill all detail with heavy noise-reduction was good.
I just hope this won´t change with future Firmware-updates.
Click to expand...
Click to collapse
I'm completely agree
High detail is better than a very little bit of noise
I think the only thing I would like to see in next firmware is a stronger sharpness algorithm. XZ with Honami Camera driver produces sharper pictures (obviously they get more grain and pixelled than XZ1 when zooming in because of sensor, lens and mpx)
*R2D2* said:
I think Sonys decision not to kill all detail with heavy noise-reduction was a good (although unexpecting when looking at their cameras which usually use quite heavy NR). Chroma-Noise is very well under control up to the highest sensitivities and the luminance-noise is very fine grained and not objectionable at all. Unfortunately thats not true for ISO 1600+, where NR gets so high everything becomes a blurry mess. Of course these sensitivities are hardly usable for 1/2,3"-Sensors, regardless of the strength of the NR
Finally you can always use some additional NR in PP, but you never can bring back detail that has already been destroyed by heavy processing.
Also contrast (at least in manual) mode is quite low (at least for a consumer-device), which leads to surprisingly good DR, unlike the blocked shadows (which also hide noise) you get on most phones (and most compact-cameras as well). Again increasing contrast in PP is not a problem, unlike the other way around.
I just hope this won´t change with future Firmware-updates.
Of course there will be less in focus as well, a bigger sensor + larger aperture means less DOF and therefore less in focus.
This can also become a problem at close focus-ranges, because the focus-plane is in reality not flat, instead it is somewhat spherical shaped. At close focus-distances therefore soft corners can become a problem.
Click to expand...
Click to collapse
An interesting and well informed reply, however, in my test shots we were not just talking about "a bit" of noise, but a considerable amount, and the picture was noticeably less sharp than the GN 3 picture I took, with its 13MP camera. So if there are any advantages to be had on the Sony, I can't see them. And while I theoretically could tinker with improving the pics in Photoshop I don't think I would have had the patience to do this with every little picture I take.
So, out of the box, the Samsung produces the better pictures, with less hassle for me, and I don't need to have specialist knowledge in photography or Photoshop in order to get a good result, and that's what tipped the scale for me.
hi sorry but i cant understand what whitelines the OP is talking.
i upload a picture, can tell me if mine have any problem?
---------- Post added at 12:15 AM ---------- Previous post was at 12:14 AM ----------
hi sorry but i cant understand what whitelines the OP is talking.
i upload a picture, can tell me if mine have any problem?
shawnhalu said:
hi sorry but i cant understand what whitelines the OP is talking.
i upload a picture, can tell me if mine have any problem?
---------- Post added at 12:15 AM ---------- Previous post was at 12:14 AM ----------
hi sorry but i cant understand what whitelines the OP is talking.
i upload a picture, can tell me if mine have any problem?
Click to expand...
Click to collapse
I was talking about CROOKED lines, not white lines.
And yes, you have them too.
shawnhalu said:
i upload a picture, can tell me if mine have any problem?
Click to expand...
Click to collapse
Look at the somewhat waved appearance of the tab bar.
But what worries me more in your picture is the softness on the right side, that is obvious even at this rather small image-size. It may be a result of not holding the camera parallel to the screen (the softer bottom definitely is), but if you always get a soft right side, your camera-lens might be misaligned.
*R2D2* said:
Look at the somewhat waved appearance of the tab bar.
But what worries me more in your picture is the softness on the right side, that is obvious even at this rather small image-size. It may be a result of not holding the camera parallel to the screen (the softer bottom definitely is), but if you always get a soft right side, your camera-lens might be misaligned.
Click to expand...
Click to collapse
haha i cant see the softness u stating. i try take afew more picture head on and let u see. thanks
naujoks said:
I was talking about CROOKED lines, not white lines.
And yes, you have them too.
Click to expand...
Click to collapse
actually i cant see the crooked line where is it?
---------- Post added at 10:47 AM ---------- Previous post was at 10:43 AM ----------
naujoks said:
I was talking about CROOKED lines, not white lines.
And yes, you have them too.
Click to expand...
Click to collapse
*R2D2* said:
Look at the somewhat waved appearance of the tab bar.
But what worries me more in your picture is the softness on the right side, that is obvious even at this rather small image-size. It may be a result of not holding the camera parallel to the screen (the softer bottom definitely is), but if you always get a soft right side, your camera-lens might be misaligned.
Click to expand...
Click to collapse
photo retake for u, can u help me have a look of the softness and the crooked line?
shawnhalu said:
photo retake for u, can u help me have a look of the softness and the crooked line?
Click to expand...
Click to collapse
First picture again shows severe softness on the right side, just look how hard it is to read the text.
Corner-sharpness isn´t the greatest with this camera, which is to be expected considering the relatively large sensor with a relatively small lens, but this shouldn´t extend that far into the picture.
Your camera seams to be especially strange, as the corners are actually sharper, the small text of the clock in the bottom right corner for example is much easier to read then the text in the center right side, which is very unusual. Normally the corners are the softest, but as you use 16:9, which crops the extreme corners, there shouldn´t be much of a problem at all.
There is nothing to notice on the rest of the pictures.
I don´t really know what´s going on there, the strange sharpness-pattern could be a result of the rather unusual distortion and the correction for it, but then left and right side should be identical. A misaligned lens/sensor should show worse corners (top right corner is quite good as well).
If the camera had some image-stabilization I would say, that maybe the moving sensor/lens-element moved to an area of the lens which isn´t optically as good, but as this camera doesn´t have any stabilization this isn´t possible.
One guess would be that there is some dirt on one side of your lens, or the covering-glass, or maybe some scratches.
Another guess would be that the camera chose one of the multi-shot-modes. Sonys cameras usually are quite good discovering softer parts of the image and multiple instances of the same objects their multi-shot-modes, but of course the algorithm isn´t fool-proof, so their might be a chance that software combined a softer image in the final picture on the right side, while not using this soft image on the left side.
As much as I love my phone, I have spotted a few things that made me question the phone or Huawei.
First of all, I was playing with the three rear cameras and noticed that when I hovered my finger above the topmost camera (I think it's the 40mp one) or covered it, my finger didn't show up. Is that supposed to happen?
Secondly, when I take a picture in complete dark, there is always some noise present.
Thirdly, the screen has a gradient hue, darker on the left side as compared to the right. I have attached an image in this post. Please check for the gradient as I seem to see it on my screen. This is clearly obvious in a complete dark room.
Please check your phone and let me know if you're facing the same thing. Thank you.
The top one is used when zooming (5x) i think.
But funny enough the live view seems to not always use the same lens as the lens the photo is taken with.
If you zoom 5x and cover the top lens (or even when its dark ?) the live view switches to the main lens.
Sometime you can catch a glimp of your finger just before the switch happens.
And then when you take the zoomed in shot with the top lens covered you get a black picture, although the liveview shows an image.
I tested this in a fairly dim living room, so your mileage may vary if you test this in a bright office or outside in the sun.
For your noisy dark pictures. If you take a picture in a completely dark room (covered your screen ?) then the ISO is probably cranked up to the moon. So your going to see noise.
Maybe try in pro mode with a sane iso and exposure time (to avoid noise and hot pixels) and see how much noise you get then.
Yes, it seems so that when I zoom while covering the lens, the picture comes as the lens is covered. Thank you for clarifying that to me.
Can you please, if you don't mind, clarify the gradient hue of the screen? Or is it just mine? Thank you.
bk227865 said:
The top one is used when zooming (5x) i think.
But funny enough the live view seems to not always use the same lens as the lens the photo is taken with.
If you zoom 5x and cover the top lens (or even when its dark ?) the live view switches to the main lens.
Sometime you can catch a glimp of your finger just before the switch happens.
And then when you take the zoomed in shot with the top lens covered you get a black picture, although the liveview shows an image.
I tested this in a fairly dim living room, so your mileage may vary if you test this in a bright office or outside in the sun.
Click to expand...
Click to collapse
Yes, it seems so that when I zoom while covering the lens, the picture comes as the lens is covered. Thank you for clarifying that to me.
Can you please, if you don't mind, clarify the gradient hue of the screen? Or is it just mine? Thank you.
Others have answered your finger question. Not really sure what that point was about anyway?
Re: noise. What were you expecting? This isn't a full frame DSLR shooting raw. This is still a tiny sensor (just less tiny) with a highly compromised lens (miniaturisation comes at a cost). However, it is in my view head and shoulders above any other smartphone for delivering photos in poor / mixed light and at night when hand held - CM1 & 808 still beat it easily when on a tripod or similar.
Re: the screen. There will always be some gradient. If it's bad, I suggest you talk to Huawei or your provider / retailer's support and get a replacement. But since you say you only see it in a completely dark room, I can't imagine this is worthy of replacement.
birajrai said:
Yes, it seems so that when I zoom while covering the lens, the picture comes as the lens is covered. Thank you for clarifying that to me.
Can you please, if you don't mind, clarify the gradient hue of the screen? Or is it just mine? Thank you.
Click to expand...
Click to collapse
It's my first oled phone so i don't have any reference on how good oled is supposed to look in very dark rooms.
If you can only see it on dim images in a dark room then your probaly noticing the "mura effect".
I cannot tell if your display is particulary bad or not. But i to can detect it looking at a uniform very dark gray backround in a very dark room. Under minimal light conditions i see no problems.
https://forum.xda-developers.com/showthread.php?t=2107228
Edit : i checked your blue image , but my eyes cannot really spot any meaningfull hue differences even in a darkened room.
bk227865 said:
The top one is used when zooming (5x) i think.
But funny enough the live view seems to not always use the same lens as the lens the photo is taken with.
If you zoom 5x and cover the top lens (or even when its dark ?) the live view switches to the main lens.
Sometime you can catch a glimp of your finger just before the switch happens.
And then when you take the zoomed in shot with the top lens covered you get a black picture, although the liveview shows an image.
I tested this in a fairly dim living room, so your mileage may vary if you test this in a bright office or outside in the sun.
For your noisy dark pictures. If you take a picture in a completely dark room (covered your screen ?) then the ISO is probably cranked up to the moon. So your going to see noise.
Maybe try in pro mode with a sane iso and exposure time (to avoid noise and hot pixels) and see how much noise you get then.
Click to expand...
Click to collapse
The top lens is the tele lens. It only has 3x zoom. The 5x zoom is a hybrid zoom where it uses both lenses.
Hi,
I noticed that Pixel 4 XL doesnt have equal sharpness in the frontcam pictures. If subject aka me are in the centre of frame (phone in portrait orientation), the photo comes halfway blurred. I mean my beard looks sharp, but in eyes level and above everything is a blurry mess. The hair looks so bad compared to my beard.. If I out stretch my arm, then its not so visible but anything from 30-50 cm shooting distances and you can definetely see that the picture looks weird because of that hair/eye level blurriness. I can fix the blurry eyes by re centering myself to lower of the frame. Its insane but it works always.
I want to know if this is normal software processing (distortion correction) or do I have a bad lens/camera sensor? And please dont remind me that its a fixed focus lens I already know that and i have described the problem which isnt purely focus issue.
E; I attached screenshot from one of my photos, where you can see the problem. (look at hair vs. eyebrown focus and scene wasnt windy!) I wasnt centered in viewfinder, little bit lower than centre of the frame trying to show that non equal sharpness (without sharing myself to whole internet)
Sadly, Pixel 4 FFC doesn't have autofocus. It is fixed focus, to get it in focus you have to move the camera at arms lenght (focus point is around 55cm)
It is a pity but that is how it is. Pixel 3 narrow FFC had autofocus and I got the best selfies that way. Pixel 3 wide FFC was fixed focus.
"The Pixel 4 comes with a fixed-focus lens that offers a wide depth of field but has a slightly limited focus range. The latter means that in selfie shots captured at close distance (30 cm), images are slightly soft. However, sharpness is good at a typical arm’s-length shooting distance of 55cm and remains good at selfie-stick shooting distance (120cm), where many other devices struggle."
https://www.dxomark.com/google-pixel-4-front-camera-review/
Google reasoning is:
P4 FFC is wide, so you want to have the back frame and other people focused (not possible with autofocus)
Maybe no space to add a autofocus FFC because of soli?
Because Google and FFC with autofocus will come back with the P5
.
This really doesn't answer your question of whether your phone has a problem or not... but the image sensor is a flat object, while the lens is a hemisphere. The different parts of the hemisphere are different lengths from the image sensor; IE the center is a different length than any outer edge. The P4 in particular has aggressive perspective correction to cover up this fact and make things (usually) look flat when they should. But it can't correct the different focal lengths that change from center to outer edge. Maybe this is what you're seeing. I don't know a lot about cameras... I could be completely wrong.
jljtgr said:
This really doesn't answer your question of whether your phone has a problem or not... but the image sensor is a flat object, while the lens is a hemisphere. The different parts of the hemisphere are different lengths from the image sensor; IE the center is a different length than any outer edge. The P4 in particular has aggressive perspective correction to cover up this fact and make things (usually) look flat when they should. But it can't correct the different focal lengths that change from center to outer edge. Maybe this is what you're seeing. I don't know a lot about cameras... I could be completely wrong.
Click to expand...
Click to collapse
Otherwise good opinion, but how every else major flagship doesnt suffer this? iPhone, Oneplus for example (have had both). Can someone test this? For testing, you need to take it outdoors and in bright conditions and take a punch of selfies from center and litle lower of frame and see how it affects to focus. (usually if you have beard its sharper than your eyebrowns and it makes the photo horrible looking when cropped in) I showed to my friend examples who doesnt know anything about smartphone cameras and he was sure that this much be broken, cause it was so baad looking and the in the other it was so good, as expected. (same distance, differennt in frame positioning)