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^depth effect, stock cam, sunny day, outdoors

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^depth effect, stock cam, rainy day & indoors

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Stock cam, depth:

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iPhone 7 Plus Main Wide-angle lens v/s Telephoto lens.

The Telephoto lens in low light is very bad! (actually not really low light but only night time indoor room normal condition) The noise is OMG! I believe that the reason why Apple auto switch to main lens for 2x zoom in low light condition!

Main Wide-angle lens
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Telephoto lens (taken from keep original photo when using Portrait Mode)
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iPhone 7 Plus Main Wide-angle lens v/s Telephoto lens.

The Telephoto lens in low light is very bad! (actually not really low light but only night time indoor room normal condition) The noise is OMG! I believe that the reason why Apple auto switch to main lens for 2x zoom in low light condition!

Main Wide-angle lens
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Telephoto lens (taken from keep original photo when using Portrait Mode)
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That's because the 2x f/2.8 camera gets boosted up on ISO in low light conditions to be able to use a high enough shutter speed. I've seen the 2x camera go as high as 1200 ISO, that's high. Third party apps like ProCamera and ProCam can be set manually and allow you to choose which camera you want and set the ISO. However you will not get the "portrait mode".
 
That's because the 2x f/2.8 camera gets boosted up on ISO in low light conditions to be able to use a high enough shutter speed. I've seen the 2x camera go as high as 1200 ISO, that's high. Third party apps like ProCamera and ProCam can be set manually and allow you to choose which camera you want and set the ISO. However you will not get the "portrait mode".
Ya, but Apple shall fixed this, booting up too high ISO won't help on nicer output.

ISO 320 (auto) - ProCamera in Wide-angle lens
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ISO 200 (manual) - ProCamera in Telephoto lens
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