Pictures taken with flash
Finally we have tried the flash in complete darkness. None of the phones had problems with focusing, when there was no AF light, the flash started to function. On the test pictures you can see that the phones that have Xenon flash (G810, N82 and K850i) are the best, and from the others only i900 and KU990 produced a usable photo. The weakest is U900’s built-in flash, but the N95s were also competing for the last place. C902’s image is the strangest, it is characterized by bad white balance and very high image noise.
Samsung G600 / Samsung G810 / Samsung i900 / Samsung U900
Nokia N82 (Made by Nokia: click)/ Sony Ericsson C902 / Sony Ericsson K850i / Samsung F480
Nokia N95 / Nokia N95 8 GB / LG KF750 Secret / LG KU990 Viewty
Probably not many of you know what a Xenon flash is and why is it good for us, so here’s the time to clear things up. Well, these types of flashes have the most basic difference from the others that they work with gas. It was a joke, but it’s almost true: there is a pipe, filled with Xenon gas, and on the two edges there are electrodes, between which electrons start moving in case of an impulse. These react with the atoms of the gas, and thus the flash is produced. The only problem is that this needs high voltage, many hundreds or thousands of Volts, or otherwise the electron won’t move fast enough to react with Xenon. As we know cell phones are not famous for their batteries of thousands of Volts, and that’s why transformers come to aid, and this can increase voltage in such a manner that is enough to create the reaction. The whole thing is better then LED flashes because it has a more powerful light, but since such a voltage cannot be kept for a long time, these flashes can’t be continuously lit. Users’ opinions are different in the matter if this is good or bad, as there are many who use the conventional LED flashes as a flashlight. The perfect solution would be to include both light sources on the phone, and the LED flash could even be used as an AF light, although for such a purpose focused light is required.
A cikk még nem ért véget, kérlek, lapozz!
