The camera won't switch to the telephoto lens when shooting in low light or through glass
Applicable products：
HUAWEI P smart Pro，HUAWEI P30(single sim card 6gb+128gb、dual sim card 6gb+128gb、dual sim card 8gb+128gb)，HUAWEI P30 Pro(single sim card 8gb+256gb、dual sim card 8gb+512gb、single sim card 6gb+128gb、dual sim card 6gb+128gb、dual sim card 8gb+256gb、single sim card 8gb+128gb、dual sim card 8gb+128gb)，HUAWEI P40 lite(dual sim card 6gb+128gb)，HUAWEI Mate 30(dual sim card 8gb+256gb、dual sim card 8gb+128gb)，HONOR 9S，HUAWEI Mate 30 Pro(dual sim card 8gb+256gb、dual sim card 8gb+128gb)，HUAWEI Mate 30 Pro 5G(dual sim card 8gb+256gb、dual sim card 8gb+128gb)，HUAWEI P40(single sim card 8gb+128gb、dual sim card 8gb+128gb)，HUAWEI P40 Pro+(dual sim card 8gb+512gb)，HUAWEI P40 Pro(single sim card 8gb+256gb、dual sim card 8gb+256gb)，HUAWEI Y9s(huawei p smart pro dual sim card 6gb+128gb)
Applicable system:
Magic UI 3.1.1, EMUI 10.1.1, EMUI 10.0.1, EMUI 10.1, EMUI 10.0, EMUI 9.1, Magic UI 3.1, Magic UI 3.0.1
Applicable products：
Applicable system:
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| The camera won't switch to the telephoto lens when shooting in low light or through glass |
Problem:
- When taking photos in a dark environment, the telephoto lens does not work when zoomed in to 5x (on the Mate 30, for example) or zoomed in to 3x (on the P30, for example).
- The camera does not switch to the telephoto lens when shooting through glass and zoomed in.
Cause:
- The telephoto lens uses a small aperture, which subsequently lets in less light. The ISO sensitivity per pixel of the telephoto lens is weaker than that of the primary lens, so the telephoto lens may not deliver optimal shooting results compared to the primary lens when the ambient light is low.
- When shooting through glass, the glass is detected by the camera's laser or ToF sensor as the nearest obstruction. As this obstruction is within the minimum focus distance of the telephoto focus, the camera may not switch to the telephoto lens when zoomed in to a level greater than or equal to the default optical zoom.
The phone automatically determines which lenses should be used depending on the ambient lighting conditions in order to achieve better photography results.
Thanks for your feedback.