Brightness slider and auto-brightness

Can someone explain how this works?
What role does the brightness slider play when auto-brightness is enabled?
It seems to affect the brightness, but I haven't quite figured it out...
Thanks,

Probably the zoom feature enabled, double tapping with three fingers will bring back the screen to normal size again in that case.
To find out if the brightness issue is software related, set your device back to factory settings, without using the latest backup.
If the brightness sensor works after that, use the backup to restore from. If the problem is coming back, your backup contained corrupt data.
Also take your protective case or film on your screen off, just to make sure nothing interferes with the sensor.
Use iTunes to restore your iOS device to factory settings - Apple Support

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So does it just try to automatically keep the brightness "medium bright" if you have it set to medium and "auto" or what? I haven't been able to see any automated brightness adjustments at all. I tried going from a really dark room to a really bright room to see if I could tell if it was auto adjusting. I couldn't tell. maybe I'm doing something wrong.

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let me try to explain this because this has happened in past and never found a way to resolve but i lived with it
now that I have a Sony A7R the problem is more serious
Firstly i take pride it making the picture happen all in camera, i use DRO lvl 5 to get enough light, like when i'm shooting at dusk. DRO its like doing HDR but in a single file, it lightens the darks. in my camera i'm happy with results
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allow me to explain
lets say I import 100 images
i double check my preferences and everything is UNCHECKED when it comes to importing options, there is no auto toning, nothing.
as the images import i see a preview in the thumbnail which looks fine.
i double click on one to enlarge it, hence leave grid view.
for a brief 1 or 2 seconds, i see the full image in all its glory but than lightroom does something funny, it darkens the image
one by one as it inspects each image, if it was a DRO image it makes it too dark.
to make this clear, the image is perfect as it was in the beginning but after a few seconds lightroom for some reason thinks it needs to correct it.
how to prevent lightroom from doing this, i want the image exactly as it is, why must lightroom apply a correction>?
i think it has to do something with interpreting the raw file and lightroom applies its own algorithm.
but here is what i dont get.....before lightroom makes the change i'm able to witness the picture exactly as it was taken and want it unchanged..
now i have to tweak each file or find a profile for it which is added work.
any ideas how to prevent lightroom from ruining my images and just leave them as they were when first detected...
there are 2 phases...one is when it originally imports and they look fine
second is scanning each image and applying some kind of toning which darkens it too much.
thanks for the help

sorry thats the auto reply message from yahoo email.
i've disabled it now
thing is, there is no DRO jpg to download from the camera
its only ARW. so my understanding is when i use DRO setting, the camera makes changes to the ARW than lightroom somehow reads this from the ARW.
but then sadly reverts it to no DRO settings.
because i notice if i take normal picture in raw mode its dark but if i apply dro to it, it comes out brighter, yet when i d/l the image from camera to lightroom, which is an ARW - there are no jpgs. lightroom decides to mess it up
so in reality there is no point in using DRO because when i upload it lightroom removes it.
is there a way to tell lightroom to preserve the jpg preview as it first sees it.
its just lame, picture appears perfect...than lightroom does something, than bam, its ruined,.
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Since I am using Aperture, and a feature of Aperture is always maintaining the 'master' without change, do I not have some protection against image quality loss (i.e., beyond that which occurred during the initial scan)? Is there any adjustment that cannot be made within Aperture to a JPEG, that can be accomplished with a TIFF? Any other drawbacks that I should consider when using a JPEG as the 'master' for my images within Aperture (vs. TIFFs)?
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/hh

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I will use if the IMac will not we under warranty but since now it is still covered it is Apple's problem to fix it. Anyhow this is now the smallest problem since the Mac is not working at all.
Now the problem is that I'm not in Korea until 20th of July and I will like to make the arrangements that my Imac will be taken for service asap. Unfortunately beside the phone number for service support that was not working before my departure and the e-mail address of one Apple worker (but not from support team) that didn't reply to my last e-mail I have no other contacts.
I don't know where to send a complain or service request.
I still hope that an Apple employee will read my post and will take action or that one member of the forum with the same problems in the past will provide me some hints about the Apple support service.
Until then I try to enjoy my holiday.
Tank you again.

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Dear NX3
Welcome to Lenovo forums
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Brightness slider and auto-brightness

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