Hi.
Taking hundreds of pictures with G4 during last weekend, I cannot sure my G4's laser auto focus is working well.
Focus time by touch is not instant as expected.
So I tested by taking picture after blocking laser part (black area left of lens), but I cannot feel any difference.
Does anybody knows how laser auto focus works?
And do your devices make difference after blocking laser ?
Related
I've noticed 2 things that are a little bothersome, seeking opinions.
1)When you take a macro, there is a sever aberration on the edges, beyond just bokeh. It almost looks like a motion blur. Is this a manufacturer blemish? Or are others noticing this too?
2)Would scratches on the laser cover screw with the ability to focus? I'd think that the lasers might skew and get confused....
Thanks!
I have taken shots with the laser completely covered up and uncovered. There appeared to be no noticeable difference with the images. Wouldn't it New funny if there "laser focus" was just a gimmick, no actual functionality.
dontbeweakvato said:
I have taken shots with the laser completely covered up and uncovered. There appeared to be no noticeable difference with the images. Wouldn't it New funny if there "laser focus" was just a gimmick, no actual functionality.
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Don't think that hasn't popped into my mind
dontbeweakvato said:
I have taken shots with the laser completely covered up and uncovered. There appeared to be no noticeable difference with the images. Wouldn't it New funny if there "laser focus" was just a gimmick, no actual functionality.
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Tried to take a close up shot with laser focus covered with my finger. Couldnt focus on the object. Uncover it and voila it focuses in to time
I have guessed (!) that the laser simply provides illumination for dark scenes, so the camera can see better, letting it autofocus more accurately.
Many conventional digital cameras have autofocus illumination functions, just a source that helps light up the middle of the scene before shooting, so the AF can work properly.
My assumption is that this is basically what the laser is doing. I don't claim to understand why it would have to be a laser vs some other light source. Perhaps because a laser can light up something further away, vs a broader light beam of the same power. Or maybe because a laser can make a small dot (unlike a broader beam), which the autofocus system can assume should be crisp, and can adjust the focus so that the laser's dot looks sharp.
But I don't think it's something like a laser rangefinder. I think it just kind of flicks around and "paints" the scene with light, so the image sensor can see better.
Try the focus tests in dim/dark lighting. I'm guessing the camera will have a harder time focusing if you cover the laser when trying to focus in a dark environment.
Again, this is speculation, I haven't tried to test the focus with and without the laser. But if it's basically acting like an AF-illuminator, then I wouldn't call it a useless gimmick. Instead, it's something that should be most-helpful in poorly-lit areas. And not needed if you're outside in bright lighting.
dontbeweakvato said:
I have taken shots with the laser completely covered up and uncovered. There appeared to be no noticeable difference with the images. Wouldn't it New funny if there "laser focus" was just a gimmick, no actual functionality.
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Click to collapse
It does have functionality but imagine you are trying to take a photo through a window of something outside. The laser would bounce off the glass and not be very useful.
in this case the G4 will fall back on contrast detection which is the std auto focus method. so covering up the laser means it uses contrast detection. might not be as quick though.
---------- Post added at 04:18 AM ---------- Previous post was at 04:15 AM ----------
drtchocky said:
1)When you take a macro, there is a sever aberration on the edges, beyond just bokeh. It almost looks like a motion blur. Is this a manufacturer blemish? Or are others noticing this too?
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Click to collapse
i notice the first 10% and last ten % are softer than the centre. is this what you mean ? maybe post an image.
2)Would scratches on the laser cover screw with the ability to focus? I'd think that the lasers might skew and get confused....!
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no, i doubt it would affect functionality.
Now for something colossally boring A picture of the laser's output.
This is a 15 second exposure using another camera, at ISO 800, f2.0, with the G4's camera running, and its laser aimed at a white sheet of paper maybe 10" away. An exposure like this captures a lot of light, and you can still barely see anything from the laser.
I can only assume that the output from the laser is simply very, very dim. I can see a red flicker when looking at the laser's window. But I don't see anything with it aimed at paper.
If the camera is reading something about the laser light not using the lens & image sensor (eg-, somehow using it as a range finder), that's impressive. If the image sensor can actually detect something useful from the laser by itself, that's maybe more impressive. That would mean the sensor is very, very sensitive. Or that maybe the laser light is largely outside our visible spectrum, but within a wavelength that the G4's image sensor sees (that is, the light is actually brighter than it looks to the eye).
I then tried focusing the G4 on things in the room in very, very dim lighting. It's dark out, the TV was on, and that's it. The camera claimed it was focused (green square, beep), but it wasn't. I even tried covering the lens & window with my finger (pitch black "scene"), and it claimed it focused.
I then aimed it at my laptop on the floor, which had one visible LED. With the flash off (no AF-assist light), I'd tap on the LED on the screen, to focus there. I tried it with the laser exposed, and the laser window covered. It kept claiming it focused, but it wasn't. The LED appeared as a big fuzzy blob. When I'd enable the flash, it would turn that on to help focusing, and would actually focus properly.
But in my very-limited test, in a dark room, with the flash disabled, I didn't observe a focusing improvement from having the laser in-use.
My RN5Pro is running on stock miui version 9.5 the front cam is nice in low lights but the dissappointung part is that the front cams focus is fixed so that the pictures took in front cam has a little blurry nature the details are missing and face looks like painted .. is there any way to make manual or autofocus work on the front cam .. i have tried so many camera apps but while switching to front cam the focus looks locked .. if rooting and enabling camera2api helps it .. im noob here so someone who knows plzz reply.......
....
As you wrote it, its FIXED.
The RN5 has a strange, short focus distance. The distance is about an arm away: if you take a selfie, make sure you hold the phone as far as you can in your hand. But if you use a selfie stick, its too far, and faces will be blurry.
Earlier phones had a front cam, that was fixed to near infinite, so almost everything looked "sharp".
This new objective system provides a natural bokeh effect on the front cam, and if you're in focus, its very sharp. But the focus range is really short, so you're easily fall in or out of the focus point.
I also heard this problem from a Samsung A5 2017 user.
tl;dr: There's no mechanical focus on the front can, you cant change the focuspoint.
Sent from my Redmi Note 5 using Tapatalk
as u said one of the pic i took had sharp details which i took in an arm length but when i tried it ones again the focus became blurry ...... i want to know that is there any way to change the fixed focus point by any means...
Theres no way to change it.
Sent from my Redmi Note 5 using Tapatalk
cruel thing ??????
(Check The Video What is that Laser Light Actived On your LG G7 Frontal Glass)
Hello everybody!
I am a person who all the time is looking for how to be more efficient with the battery of your phone I really like to disable GPS and disable the most things you can do and I just bought this LG G7 ThinkYou and I just realize that there is a laser invisible light powered on all the time on your frontal glass of your LGg7 check the video please:
note: THIS LASER LIGHT IS ONLY NOTICIABLE WHEN YOU SEE IT THROUGHT A CAMERA
VIDEO (YOUTUBE): watch?v=HAWa7vrp0Bk
And as you know I am caring if would that consume my battery and how to disable it (1), would that damage my eye vision (2), maybe it will finish life time soon because its all time on (3), what is that used for (4) my others mobiles don't have that (Galaxy Nexus, Sony Z5).
Sandro
sandronejm said:
(Check The Video What is that Laser Light Actived On your LG G7 Frontal Glass)
Hello everybody!
I am a person who all the time is looking for how to be more efficient with the battery of your phone I really like to disable GPS and disable the most things you can do and I just bought this LG G7 ThinkYou and I just realize that there is a laser invisible light powered on all the time on your frontal glass of your LGg7 check the video please:
note: THIS LASER LIGHT IS ONLY NOTICIABLE WHEN YOU SEE IT THROUGHT A CAMERA
VIDEO (YOUTUBE): watch?v=HAWa7vrp0Bk
And as you know I am caring if would that consume my battery and how to disable it (1), would that damage my eye vision (2), maybe it will finish life time soon because its all time on (3), what is that used for (4) my others mobiles don't have that (Galaxy Nexus, Sony Z5).
Sandro
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Click to collapse
That should be the proximity sensor that checks if the phone is in a pocket so I can't disable the screen off gestures.
Yes, it's a proximity sensor, and it's important against unwanted control and activation of the display during calls or if is in pocket. It's an IR LED that detect the distance to +-5cm. Battery consumption is basically zero. About 10mA thanks to IR. And lifetime is hundreds thousand hours.
On a similar principle works TV control remote (you can see light with camera too if you press button) so it's safe to live.
https://www.youtube.com/watch?v=RO1P8jGYU78 more info about proximity.
Oh, I see. When it is in my pocket it should keep unlocked right? Currently I did disable this resource and it keeps flashing for what kind of proximity reason?
Hey I think its about the frontal camera maybe?
Yeah it is similar to the remote control of my TV launching laser when I press a button.
I notice when the back camera is recording also there is a laser light on the back glass.
No, its should be locked. Simple test: cover sensor with finger and do knock knock wake up. Display must stay off.
Laser on Back side Is focus for camera.
I love the Note 10/+ cameras, but the lack of support for the Wide Angle and Telephoto cameras in Pro mode and not being able to get DNG/RAW files with that sensors is a reason for me not to fully love the phone's camera setup. As far as I know, all cameras have the same sensor, so really it wouldn't be much difficult for Samsung to let us use those cameras in Pro mode via an OS Update.
Other manufacturers like LG and Huawei let me take RAW files with other cameras (I've had the LG V30 and the Huawei Mate 20 Pro), and if you are a photographer or at least know the importance of RAW files, you should understand me.
I shoot professional photography on my DSLR, but when I leave my camera at home to go with friends or to a live show, having full camera control on my phone would be really appreciated knowing how easy would be for Samsung to let us do by software update.
Edit. Misunderstood at first
Each sensor is different: normal and telephoto are 12MP, ultrawide is 16MP, telephoto and ultra wide are 1 micron sensors, normal has 1.4 micron pixels so it's best for low light and I think ultra wide has no auto focus? But that's no excuse, those cams I think are the same as S10+, so are around for at least 6 months and should have enough time to properly update software.
I remember when Note3 came out it was one of the first, if not the first phone with 4k video etc., I don't see that bleeding edge anymore. For example Huawei has 40 MP sensors and better low light capability. Maybe Samsung is adopting Apple strategy to make the phone just good enough and leave newest tech for next generations, but that could bite them back.
Greetings Just got my hand on a LG G8S here in Norway and I'm pretty happy so far. I started exploring the (three) cameras and noticed today, that if I covered the tele-lens, it did not make any difference. Activating the zoom mode (big tree icon) still provided an image, showing that it was just using a digital zoom on the main lens. Wide lens works fine however.
I also noticed, in manual mode, I could not activate the tele mode at all. Seeing also that the aparture did not match the tele one witch should be f/2.4.
Could it be that I have a G8 firmware, which only supports two cameras?
Thanks!
Pål
Try This.
Guess this scenario is been discussed and tested on other LG triple camera phones with Telephoto lens.
G8s telephoto lens with F2.6 needs good light to work, in poor lighting it switches back to the main/standard lens and offer digital Zoom.
Try outdoors with good lighting,switch to tele lens and then cover this lens with your finger.
Not sure why the software has to decide which lens to choose, May be this is the so called AI camera feature
Try gcam. It uses telephoto lens even at night
Hey, if you want to force the use of the telelens lens long press the little tree button, and it will show a live mini-preview of each lens. Choose the tele view and take the picture. You'll notice the difference in the quality and stability of the preview opposed to when you try to scroll smooth past 1.9x zoom.
But you won't be able to do anything else but snap the shot.
As soon as you click in something out of this preview option, whether to adjust exposure or anything, you'll notice you'll leave the telelens to the main sensor 2x digital
It's not ideal, but Works... Looks like a.... Bug?
Know this has been dead for a while but I investigated this and it bases the lens selection on focus distance and light availability. If you try to use the tele lens on close up subjects it will auto select the main sensor. If used for shooting more generally the tele lens is selected. I imagine light availability makes a difference too. I wish it wasn't blocked in manual camera mode though.