Go on xda. There are a few mods to speed this up. If u don't want them, you can download the LG 4.3.1 camera app and flash it through recovery and it speeds up the focusing... You just need to root and download flash Gordon app and it will flash the zip file for you..
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Thanks for the advice. Will the LG 4.3.1 camera app increase focus speed?
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I just registered to say that I bought an LG G2 three days ago and I'm currently very frustrated by the camera as well.
Once it actually focuses, sure it takes great pictures, but it takes a long time in low lighted rooms to actually focus. Outdoors? Very good and fast.
But once I go inside, it becomes unusable. Is this something that can be fixed by a future update, or did I make a big mistake buying this phone?
I got rid of my G2 because of this problem and the horrible audio when recording a video.
This should help though; turn off the image stabilization feature. This just gives you longer exposure times resulting in a very blurry photo. Then, adjust ISO to 400-800 (depending on how much grain you want in your photo), and reduce the EV -1. This will give you snappier camera performance. Let me know if this fixes your issue!