Camera - theory
So. We reached the greatest weapon of the G800, which is a “petty” 5 mega pixel camera, with 3X optical zoom and xenon flash. It sounds good even when written down, it’s not bad in practice either but we can pick on it anyway. First, the camera is the reason why the phone is so chubby, since the zoom doesn’t function as regular, ergo it doesn’t stick out of the phone but the Koreans used a technology called inner zoom.
This means that the incoming light changes its path with the help of a mirror or prism, and so it passes along inside the phone parallel with the back cover and here it receives the modifications needed to bring the view closer. Furthermore we are talking about a quite complicated little gadget, as there is a lens-system inside composed of many parts, which elements are moved by small servomotors, and in the end of this system there is a CMOS sensor sitting, with an approximate size of 5x5 mm, which makes it rise from the similar sensors used in phones. This in fact – which may be surprising – counts as a big one, at least in the domain of mobile phones.
The auto focus function connects to this, which nowadays became an obligatory element of all considerable mobile phones equipped with a camera. I observed however that when using a 3X optical zoom, it didn’t succeed in taking perfect pictures, it performs fine until a 2X zoom. Of course it is still way better than a crappy digital zoom, which is a simple marketing shot, but it could be perfected. The general direction of developments is good however and I wouldn’t be surprised if the pioneer role of the G800 would make the other manufacturers use inner-zoom.
To make the experience even more complete it’s worth talking about the flash using xenon technology (this is the technology use in normal digital cameras too) which produces the very bright flashing by gas discharge. This is needed because the batteries of mobile phones can not produce so rapidly, due to construction, a current strength which would be enough to generate a flash with such a light intensity on a standard LED, as these battery packs are constructed for long-term, uniform power output. The xenon, however, produces the flash through a chemical process, so these batteries are capable of supplying power to them. Until now only the K800/K810/K850Sony Ericsson phones and the LG KG920 used this technology, and now Samsung took it up too, which means that it started to spread.
A cikk még nem ért véget, kérlek, lapozz!
