Why Wide angle lenses distortion is not necessary a bad thing - Sony Xperia XZ Premium Questions & Answers

I see many people complaining about the distortion in photos without knowing that it's a common issue in wide angle lenses. Here is a good explanation of it:
https://youtu.be/q0FdW4qzxD4
I know if you want to keep the lines of your subject vertical you have to shoot at the level of the horizon, or else you will get a distorted image. But from the other side you can use the distortion for your advantage to make your subject interesting and look more artistic.
I found some links you may find interesting and help you take the best out of your of your phone's wide angle lens:
YOUTUBE:
Photography tutorial: How to use wide-angle lenses | lynda.com
Three Tips for Using a Wide Angle Lens: Exploring Photography with Mark Wallace
How to use wide angle lenses - DSLR photography tutorial
WEBSITES:
5 Mistakes Beginners Make Using a Wide Angle Lens and How to Avoid Them
How to Use Wide Angle Lenses
10 Tips for Shooting Wide-Angle
I hope you find them helpful and happy shooting!

Nice thread, good job

Related

Best photo resolution

Hi everyone!
Which resolution do you use, 12 mpx or 20 mpx? 12mpx gives you hybrid zoom x2 but phone only uses rgb lens, while 20mpx supposedly uses both lenses to create a hybrid colour/b&w pic. So which do you use? I have it on 12mpx in order to use zoom but don't really know which is best.
Cheers!
It actually depends on your preference and the situation you want to create in the photo. I use the 20mp when shooting wide angle landscapes, while im using the 12mp when shooting portraits or closeups
earl_110 said:
It actually depends on your preference and the situation you want to create in the photo. I use the 20mp when shooting wide angle landscapes, while im using the 12mp when shooting portraits or closeups
Click to expand...
Click to collapse
Thanks for replying! I've actually found that shooting a normal close up pic on 12mpx shoots in kind of a wide-angle effect. Last friday celebrating carnival at school, I was able to fit in a whole class of 28 kids from a few feet away. If u look at the pic, it looks like it has been shot on a wide-angle lens!
Any more opinions on camera config are more than welcome!
I don't believe that the 20MPx option uses both cameras. When you partially cover the B&W sensor, there is no noticable effect on the photo. Looks like it is only software based up-scaling and may get you jagged edges sometimes. After some testing with 20MPx and then 20MPx resized to 12MPx just for comparison, I prefer the 12MPx default setting.
_Marian_ said:
I don't believe that the 20MPx option uses both cameras. When you partially cover the B&W sensor, there is no noticable effect on the photo. Looks like it is only software based up-scaling and may get you jagged edges sometimes. After some testing with 20MPx and then 20MPx resized to 12MPx just for comparison, I prefer the 12MPx default setting.
Click to expand...
Click to collapse
Hi Marian, thanks for your reply!
So on a phone with a dual camera, what would be the purpose of the dual lens?? If one is rgb and the other monocrome, don't they both work together to provide depth information and zoom? Or do all colour pics use just the one rgb lens and the other is exclusively for b&w pics?? Seems a little pointless to me...
You are totally right about the sw upscale to 20mp as any other camera app only detects a maximum resolution of 12 mp, but it seems strange to me that even on 12mp colour pictutes, the phone wouldn't use both lens (depth and zoom) because the inferior P20 Lite precisely doess that on all the reviews I read about it (I've always thought that was the point of all dual-lens cameras).
Cheers!
The B&W sensor should provide depth information. You can try different camera modes and cover the B&W sensor. The phone says "Please do not cover the lenses." in some camera modes. But if you don't put finger too close, nothing happens. I can't tell it does anything at all to the image quality which seems strange. Did they made some mistake in latest build? It only does have some effect on aperture mode when you can see heat haze effect on display. It sucks we don't have more options like jpg quality or sliders for post-process filters.

Camera OIS/sharpness?

Hi folks,
I am presently playing around with my P40 Pro, especially the camera as this is of special interest for me.
I am comparing with a Oneplus 8 Pro.
What I noticed is that the P40 Pro camera is giving a lot more blurred images at medium to lower lighting, in fact it's surprisingly diffcult for me to get a sharp indoor shot.
This is on .122 Firmware and I am bit at a loss on how to tackle this, in fact it's a bit disappointing for such a hyped camera.
Isn't the P40 pro camera supposed to have OIS?
And this is with very comparable aperture and shutter speed between OP8P and P40P...
Am I the only one? Any suggestions?
Thanks,
Axel
Are you using Google services?
Noexcusses said:
Are you using Google services?
Click to expand...
Click to collapse
Yes... Why?... Is there a known influence?
What do you exactly mean by blurred photos. Motion blur or out of focus blur? Motion blur is caused by slower shutter speed. Focus blur by focus failure. There is also blur(bokeh) caused by much bigger camera sensor used in P40 PRO. So depending what your subject is you may experience different results. Longer shutter speed and lower ISO is preferred for best image quality as long as you have static scene. But in scene with moving object, object in motion can be blurred. Personally I am on .121 and I rarely get blured photo due to any phenomena described above.
D1G1TE said:
What do you exactly mean by blurred photos. Motion blur or out of focus blur?
Click to expand...
Click to collapse
To me it seems like motion blur from camera shake... But images at around 1/30s with OIS should normally be fine - at least they are on the other handsets I tried...
This is why I am asking, maybe OIS is not working... Anybody got an idea to test this with some tool?
Have you contacted Huawei customer support? Could be faulty, it also may be worth checking out the huawei community page to see if that is the case
TomFordGoesForth said:
Have you contacted Huawei customer support? Could be faulty, it also may be worth checking out the huawei community page to see if that is the case
Click to expand...
Click to collapse
Yep, that's my fear.... Well, I am still within the return period, maybe it makes sense to go back to the dealer instead...
EDIT: seems a factory reset fixed it, now I need to discuss with myself whether I try to go without Google for the time being....
s3axel said:
Yes... Why?... Is there a known influence?
Click to expand...
Click to collapse
Yes some Google services effecting camera... I have tested many ways..
Noexcusses said:
Yes some Google services effecting camera... I have tested many ways..
Click to expand...
Click to collapse
This is very interesting, would you mind sharing your findings/theory ?
Noexcusses said:
Yes some Google services effecting camera... I have tested many ways..
Click to expand...
Click to collapse
Well, it fits to my experience, as written above. Sadly that nails the coffin then, the P40 Pro is going back Thanks for sharing, though
Yeah, firlando code method creates on my night shots some effect lines and on a1234567 method i have good night shots but blurry fotos on daylight... Today i will try to use my phone without Googleplay services...
This installing method on Google services witch you need to go on apps and delete playstore etc i think is the keys for the problem... We need a clean installation without deletations..
s3axel said:
Well, it fits to my experience, as written above. Sadly that nails the coffin then, the P40 Pro is going back Thanks for sharing, though
Click to expand...
Click to collapse
Wrong
Observation about the lines in the foto. Lines are reflections from lights. I realised it today. Im testing camera without Google services. Tomorrow i will test on daylight.. I think 121 update is bad update.. is there any way to roal back to 112?
Here its a foto without Google services... Still no sharp almost blur... I think is Just the 121 update is worst than out of the box 112 version
We just w8 the 127 update
Noexcusses said:
Here its a foto without Google services... Still no sharp almost blur... I think is Just the 121 update is worst than out of the box 112 version
We just w8 the 127 update
Click to expand...
Click to collapse
Thanks for checking this out, then I am a bit reassured
Hopefully this is fixed with a near term update because this really sucks!
Don't know I rolling back is possible,will need to investigate a bit more....
Noexcusses said:
Here its a foto without Google services... Still no sharp almost blur... I think is Just the 121 update is worst than out of the box 112 version
We just w8 the 127 update
Click to expand...
Click to collapse
I am also disappointed with this update (121) pics quality is average but video quality is lower than on p20 pro.
Zoom doesn't seem to work properly either - it's digital up to 8,5 -10 x then periscope kicks in.
Noexcusses said:
Here its a foto without Google services... Still no sharp almost blur... I think is Just the 121 update is worst than out of the box 112 version
We just w8 the 127 update
Click to expand...
Click to collapse
Erm ... I don't see anything wrong with that picture.
You focused on the closed petal at the left side, it's perfectly sharp, rest blurred as it should be. Not the prettiest bokeh, but okay.
Do I overlook something?
---------- Post added at 07:30 AM ---------- Previous post was at 07:24 AM ----------
Noexcusses said:
Yeah, firlando code method creates on my night shots some effect lines and on a1234567 method i have good night shots but blurry fotos on daylight... Today i will try to use my phone without Googleplay services....
Click to expand...
Click to collapse
Again, I don't see what's wrong with that picture. Maybe you could point out the problem a bit more in detail?
It would also be quite helpful for sorting out culprits if you (and anyone else) accompany your pictures with some EXIF data, like shooting mode, AI on/off, ISO, exposure, aperture and zoom factor. Unfortunately, XDA seems to remove that data from posted pictures.
---------- Post added at 07:24 AM ---------- Previous post was at 07:21 AM ----------
forever_lol said:
Zoom doesn't seem to work properly either - it's digital up to 8,5 -10 x then periscope kicks in.
Click to expand...
Click to collapse
That's indeed the case with firmware .121. And it's far worse in the "Pro" mode, rendering "Pro" mode almost useless.
Let's hope the next updates home in on that fault.
Look the sharpness on 112 version
Noexcusses said:
Look the sharpness on 112 version
Click to expand...
Click to collapse
EXIF data? Answers to me previous questions?
These are important information, e. g. telling me about the aperture of the lens used, making a difference regarding depth of field, possibly explaining why you *perceive* a picture as not okay.
Besides that:
Similar quality, similar sharpness - if not identical.
This time, there was more distance to the subject, widening the depth of field, the "sharpness range."
Let's assume the picture was taken with the main 50 MP camera, having an aperture of f/1.9 - a big difference to the aperture of the telephoto lens with f/3.4.
The smaller the f-number, the larger the physical lens opening. And the larger the physical lens opening, the shallower, smaller the depth of field.
Meaning: With a shallow depth of field, a few millimeters more or less distance to the subject can make the difference between razorsharp and blurry. Result: Only objects exactly within the depth of field are rendered sharp.
With a wide depth of field and a larger distance, like with the telephoto lens, it's less crucial, every part of the flower will be sharp.
I would show you example pictures if I was allowed to use external links - but my post count is still too low.
Just try taking pictures of the same flower with different lenses, one with the 50 MP main camera, one with the telephoto lens. With the latter, increase the distance till the flower roughly occupies the same space in the viewfinder as with the main camera.
Important: Use a zoom factor of 10, not 5 - this makes sure your really switch to the telephoto lens. At present, there's a software bug causing the camera to often use horrible digital zoom for 5 x instead of the real telephoto lens (seems to be connected with the metered subject's distance). You can check this by covering the rectangular telephoto lens with a finger. If the picture vanishes, the lens is doing it's job.
You'll find out that the photo taken with the main camera has sharp and blurry areas, while the photo taken with the telephoto lens is rendered sharp everywhere.
That's the results of aperture and distance.
And that's why I don't see anything wrong with your first flower picture: Wide open aperture, small distance = tiny depth of field = tiny area of sharpness.
The way it should be because we all like that bokeh effect (blurry background, making the subject stand out) more than typical "flat" smartphone pictures.
But this benefit is paid with a drawback, the small depth of field, rendering everything outside that "sweet spot" blurry.
Perfectly normal, nothing to write home about.
Oh wait, I'll dare to post a link anyway - hope the moderators won't kill me for that impertinence.
Just took two quick photos right outside my house, clearly showing the effects I explained above.
http://waagerecht.com/kram/Flower_comparison.jpg
Picture is quite large, so be warned.
Telephoto: ISO 50, f/3.4, 1/196 s. Main lens: ISO 50, f/1.9, 1/846 s. Both shot in Photo auto mode, no AI.
About that numbers: ISO 50 tells me there should be no grain in the picture; the higher the ISO, the more grain in the picture.
f/3.4 tells me there's a wide depth of field, so there should be no greater blur. Also tells me the telephoto lens was used. f/1.9 tells me to expect blur everywhere outside the "sweet spot", main lens used.
1/196 and 1/846 tell me about very short exposure, so in-motion unsharpness (camera shake, moving subject) is very unlikely.
And because the telephoto lens has a smaller aperture of f/3.4 (and lenses with a higher curvature), less light reaches the sensor, thus exposure time is greatly increased, 1/196 s versus 1/846 s.
See why I asked for that data?
You'll see that the telephoto shot is all sharp (until you zoom in; lower sensor resolution plus digital zoom, today's modern pestilence), you can even see the structure of the green leaves, while the main camera shot has everything blurred except the flower's pistils.
That's just the way cameras work.
So enjoy your fine camera, it does a great work and does it right.
Klosterbruder said:
EXIF data? Answers to me previous questions?
These are important information, e. g. telling me about the aperture of the lens used, making a difference regarding depth of field, possibly explaining why you *perceive* a picture as not okay.
Besides that:
Similar quality, similar sharpness - if not identical.
This time, there was more distance to the subject, widening the depth of field, the "sharpness range."
Let's assume the picture was taken with the main 50 MP camera, having an aperture of f/1.9 - a big difference to the aperture of the telephoto lens with f/3.4.
The smaller the f-number, the larger the physical lens opening. And the larger the physical lens opening, the shallower, smaller the depth of field.
Meaning: With a shallow depth of field, a few millimeters more or less distance to the subject can make the difference between razorsharp and blurry. Result: Only objects exactly within the depth of field are rendered sharp.
With a wide depth of field and a larger distance, like with the telephoto lens, it's less crucial, every part of the flower will be sharp.
I would show you example pictures if I was allowed to use external links - but my post count is still too low.
Just try taking pictures of the same flower with different lenses, one with the 50 MP main camera, one with the telephoto lens. With the latter, increase the distance till the flower roughly occupies the same space in the viewfinder as with the main camera.
Important: Use a zoom factor of 10, not 5 - this makes sure your really switch to the telephoto lens. At present, there's a software bug causing the camera to often use horrible digital zoom for 5 x instead of the real telephoto lens (seems to be connected with the metered subject's distance). You can check this by covering the rectangular telephoto lens with a finger. If the picture vanishes, the lens is doing it's job.
You'll find out that the photo taken with the main camera has sharp and blurry areas, while the photo taken with the telephoto lens is rendered sharp everywhere.
That's the results of aperture and distance.
And that's why I don't see anything wrong with your first flower picture: Wide open aperture, small distance = tiny depth of field = tiny area of sharpness.
The way it should be because we all like that bokeh effect (blurry background, making the subject stand out) more than typical "flat" smartphone pictures.
But this benefit is paid with a drawback, the small depth of field, rendering everything outside that "sweet spot" blurry.
Perfectly normal, nothing to write home about.
Oh wait, I'll dare to post a link anyway - hope the moderators won't kill me for that impertinence.
Just took two quick photos right outside my house, clearly showing the effects I explained above.
http://waagerecht.com/kram/Flower_comparison.jpg
Picture is quite large, so be warned.
Telephoto: ISO 50, f/3.4, 1/196 s. Main lens: ISO 50, f/1.9, 1/846 s. Both shot in Photo auto mode, no AI.
About that numbers: ISO 50 tells me there should be no grain in the picture; the higher the ISO, the more grain in the picture.
f/3.4 tells me there's a wide depth of field, so there should be no greater blur. Also tells me the telephoto lens was used. f/1.9 tells me to expect blur everywhere outside the "sweet spot", main lens used.
1/196 and 1/846 tell me about very short exposure, so in-motion unsharpness (camera shake, moving subject) is very unlikely.
And because the telephoto lens has a smaller aperture of f/3.4 (and lenses with a higher curvature), less light reaches the sensor, thus exposure time is greatly increased, 1/196 s versus 1/846 s.
See why I asked for that data?
You'll see that the telephoto shot is all sharp (until you zoom in; lower sensor resolution plus digital zoom, today's modern pestilence), you can even see the structure of the green leaves, while the main camera shot has everything blurred except the flower's pistils.
That's just the way cameras work.
So enjoy your fine camera, it does a great work and does it right.
Click to expand...
Click to collapse
Jeasus Christ i never used 50 mp sesnor i use the normal sensor for the red flower and also same sensor with pink flower... im changing so many phones every year and i can clearly understand what a foto needs! P40 pro with 122 version is less detailed on normal shots than with 112 , i need t use night mode on day light fotos to get some sharpness..
Also the foto you have posted there is no detailed at all i can taje same photo with my xiaomi mia 3 Stock camera apk... and i can get also much better shots withy GCAM on mia 3!

Wide angle camera is darker than normal camera

Hello to all,
Just got my OnePlus 8.
When checking the cameras, I noticed a significant difference between the normal and wide angle cameras.
The wide angle is much darker and sometimes seems to have problems focusing.
I have not found many threads on Google (and the few that I found mention blurriness, not darkness).
Does anyone else have this issue? Could it be a hardware issue?
Thanks for any advice.
So very strange. After a lot of trying last night, I wrote the post above.
This morning, I can't reproduce the issue. Both images look very similar in terms of lighting.
Il post back of three issue comes back or if I come to understand what happened in the first place.
It's normal due to hardware limitations. The wide angle has a much smaller aperture (very common in camera lenses and phone camera).
Smaller aperture means less light can be captured, think of it as your eyes
If you almost close your eyes (small aperture) what you see is darker.
That's why despite the same megapixel count etc, wide angle photos are darker and noisier, and if the software try to compensate , it needs a longer shutter speed (longer shooting time), longer shutter speeds means shakes and movements are captured, resulting in blurry photos, and since the wide angle has no OIS, it's even more likely to come out blurry if you aren't super still while shooting.
Hope this helped

Does the 4a have a wide angle lens?

I'll have to get used to the new layout. I see the specs say 12.2mp wide angle lens or at least I read it somewhere. Does it have the option to take wide angle pictures? I like the size of the phone but would love a wide angle camera. Thanks
It only have a single camera on the back
jeffrimerman said:
I'll have to get used to the new layout. I see the specs say 12.2mp wide angle lens or at least I read it somewhere. Does it have the option to take wide angle pictures? I like the size of the phone but would love a wide angle camera. Thanks
Click to expand...
Click to collapse
Maybe you can find some reviews of the phone on the internet. It'll answer questions like this, and you'll see examples of photos taken on the camera.

Question Are the back cameras a sham?

Hey,
I was really wondering if the back cameras are actually helping the picture quality at all.
I have tried using different camera apps and covering some of the lenses and the picture/video quality seems always to be the same even if it's only 1 lense uncovered.
Can someone confirm/deny?
IMHO pretty useless, but you should see difference in portrait mode, where background is blurry when additional modules work and sharp when are covered.
Uhm.... you have 3 Back Cameras.
1 is Normal Mode 48mp or rather 12mp with Quad Bayer raster.
2 is wide Angle which has bigger FoV
3 is Macro Lens.
And only one camera is used at a time.
Only exception is the ToF Sensor that looks like a camera but only brings Depth infos for focus.
IMHO best Camera Quality comes with Google Camera mod and a custom XML.
Downloaded from here: https://www.celsoazevedo.com/files/android/google-camera/dev-bsg/f/dl61/
or Telegram group.

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