iPhones - if they have more than one camera (hence from the iPhone X model and above) - use all of their cameras simultaneously, when shooting with the native iPhone's Camera app.
Being all of the 2 or 3 cameras active (depending on whether you are using a standard iPhone 13/13 Mini or a 13 Pro for example), the native Camera app decides for itself which of the cameras to use based on the shooting conditions you are in and based on the nearest subject in focus.
When using our Pro Series Lenses, since the lens is the closest object to the iPhone cameras, the native Camera app automatically chooses by itself which camera to use, to have the nearest object in focus = the lens. This might end up causing you to see the lens in the viewfinder as the iPhone does not allow you to select which of the avaiable cameras to use.
To avoid this to happen we advise using our Reeflex Pro Camera app, when shooting with our Pro Series Lenses and Pro Series Filters, which allows you to uniquely choose which iPhone camera to use (out of the 2 or 3 cameras available) depending on