OPPO F1 main camera and front camera have high resolutions photo result with big sensor size, unfortunately main camera of OPPO F1 only have f/2.2 aperture number, but it have LED flash to help taking better images in low light situations and also use ISOCELL sensor which created by Samsung. Font camera is ready to take good selfie photography, because it have 8 megapixel resolutions with f/2.0 aperture number which can give better photo at low light situations although front camera does not have light flash.
Drawback of OPPO F1 is use Android Lollipop version 5.1 as factory default Android operating system, it will be better if use Android Marshmallow by default, but using original Oppo Android Lollipop already give result for all features, therefore please do not install custom ROM non standard Android Marshmallow because we will get some trouble or some features will not work with custom ROM.
Expensive is other disadvantage of OPPO F1 will make some users think twice before buy this phone, moreover this phone does not have fingerprint sensor which usually include at high end smartphone.
Weakness of OPPO F1 is not have NFC for data communications, but we still can use Wifi or bluetooth for data transfer or other wireless communications.