Rather than saying more MP = better, one should take the sensor size into account thus the transistor/inch ratio.
The higher the density the smaller the transistor will be, the higher the temperature will be, therefore the more noise and lower quality you will get.
Thats why a point and shoot camera with 12MP compared to an 10MP DSLR is not necessarily the better camera.
Also, a bigger sensor means more area that can catch light, hence better low light abilities.
Modern cameras have either CCD (charge-coupled device) or CMOS (complementary metal–oxide–semiconductor) sensors, whereas both types have their trade-offs and there is no apparent winner at first sight.
Since CMOS is cheaper to produce and doesn't tend to produce funny results while dealing with heat or very bright spots as the cheaper CCDs this is a popular design indeed.
High quality CCDs won't suffer of the same problems as their cheaper siblings, in fact if a high quality camera, film cameras in particular, is used, often they come with a 3CCD, which means that instead of having 1 sensor that has to deal with RGB color information, the color is split up into red, green and blue with some kind of a prism and therefore each color is handled by its own sensor. Needless to say that this often delivers very good results and helps improving noise and dynamic range indeed, but unfortunately I don't know a current DSLR that is using 3CCD.
After all, there is more to a camera than just a image sensor. It is the careful fine tuning and orchestration between several hardware parts, the software and last but not least the lenses
All these little delicate properties will tell you if a camera will deal better with lowlight than others. But as this is one of the main fields of development, as a rule of thumb you can expect modern cameras being better in lowlight situation (see that I am not saying sensor?)
Before focusing too much on a sensor itself look at the bigger aspects of a DSLR and rethink if you really need extreme low light features so that you have to keep track of the current sensor development.
Badala ya kusema zaidi MP = bora, mtu anapaswa kuchukua ukubwa sensor katika akaunti hivyo transistor / inchi uwiano. Kwa sababu ya kiwango cha juu cha transistor, kiwango cha juu cha joto cha transistor, na kiwango cha juu cha sauti, transistor inaweza kuwa na nguvu zaidi na hasara zaidi. Kwa hiyo, kamera ya 12MP na 10MP DSLR sio bora. Pia, sensor kubwa ina maana eneo zaidi ambayo inaweza kukamata mwanga, kwa hiyo bora uwezo wa mwanga mdogo. Kamera za kisasa zina sensorer za CCD (kifungo cha malipo) au CMOS (kifungo cha chuma cha oksidi) - ingawa aina zote mbili zina biashara zao na hakuna mshindi dhahiri kwa mtazamo wa kwanza. Kwa kuwa CMOS ni ya bei nafuu kutengeneza na haipendi kutengeneza matokeo ya kuchekesha wakati wa kushughulika na joto au sehemu zenye mwangaza sana kama CCDs za bei nafuu, hii ni muundo maarufu. CCDs ya ubora wa juu hazitakuwa na matatizo sawa na ndugu zao wa bei nafuu, kwa kweli ikiwa kamera ya ubora wa juu, kamera za filamu hasa, hutumiwa, mara nyingi huja na 3CD, ambayo inamaanisha kwamba badala ya kuwa na sensor moja ambayo inapaswa kushughulikia habari ya rangi ya RGB, rangi imegawanywa katika nyekundu, kijani na bluu na aina fulani ya prism. Kwa kweli, hii ni moja ya njia bora ya kuongeza sauti na kuongeza sauti ya sauti, lakini kwa bahati mbaya, hakuna DSLR inayoweza kufanya hivyo. Baada ya yote, kamera ni zaidi ya kipimuaji cha picha tu. Ni tuning nzuri na orchestration kati ya sehemu kadhaa za vifaa, programu na mwisho lakini si chini ya lenses: mali hizi ndogo nyeti itakuambia kama kamera itashughulika vizuri na mwanga wa chini kuliko wengine. Kama hii ni moja ya maeneo kuu ya maendeleo, kama sheria ya kidole gumba unaweza kutarajia kamera ya kisasa kuwa bora katika hali ya mwanga wa chini (ona kwamba mimi si kusema sensor?) Kabla ya kuzingatia sana juu ya sensor yenyewe, angalia mambo makubwa ya DSLR na kufikiria tena kama kweli unahitaji vipengele vya mwanga wa chini sana, hivyo lazima ufuatilia maendeleo ya sasa ya sensor.