It took months, years even if we had the first experiments that already showed an incipient tendency, seeing as they arrive at the market different solutions for the double lenses from many of the manufacturers involved in the current panorama. We have mixtures between normal and wide-angle lenses, monochrome lenses accompanying others for color and even games with the blur, the striking bokeh.
Of course, there are also proposals to bring optical zoom to mobile phones. Optical zoom without moving lenses, which is the main feature. In the case of Apple and ASUS , for example, have opted for two lenses with two different focal points, so that you can jump from one to another and get our longed zoom. Now Oppo proposes its own solution, a prism and several lenses to offer 5 increases without loss of quality.
Two lenses, one prism
The secret of Oppo to achieve this 5x optical zoom in a mobile phone with fixed lenses is that the immobile are the lenses, but not part of the mechanism inside. Specifically, we speak of a system of more than fifty pieces in which we do find moving parts. In fact, the zoom key is a moving part and the most important of the whole system, an interior prism that have taken months to develop and for which they have employed a team of more than 100 engineers.
Oppo places a main lens at the beginning of this new camera and another main lens at the end of it, both to capture the image that will finally arrive at the sensor of the camera, in charge of processing this image. What produces the zoom of up to 5 increases is a prism placed between both lenses, and accompanied by another good handful of interior pieces, and that is in charge of redirecting the light that enters by the first lens towards the second one.
Depending on the position of this prism, the light is grouped or dispersed, resulting in an increase of the captured image without loss, which finally ends in the photographic sensor of the camera. The sensor, therefore, does not make any type of cut through the software. Just about it concentrates the image of one size or another.
Thus, Oppo ensures a maximum zoom of five increases that can also vary, simply turning the prism from the software of the phone, and not lose a bit of quality along the way. The system has a drawback, and is that it produces a camera module thicker than usual because at Oppo have not wanted to dispense with the optical stabilizer.
Thickness is not a problem ... for now
Do you have an advantage? Naturally. Despite its thickness, 5.7 millimeters, it is still thinner than most mobile phones on the market. In case of wanting to introduce more increases, the camera module would become fat because of having to introduce a bigger prism, and therefore the "fattening" of the mobiles can be a problem in the future if we look for results that we find in the teleobjectives More advanced.
At the moment we can not advance anything else, because the system has been presented during the Barcelona MWC that is being held at the moment and we have already gone to try it first hand, to see what results it produces and if it really gives us a real zoom Up to five magnification optics with fixed lenses. There is no doubt that this is a breakthrough for the cameras of the mobile phones although, logically, it will come patented by Oppo itself . That leaves out the rest of the market. For now.