Pentax K-5 vs Nikon D7000
Nikon thiab Pentax yog ob lub tuam txhab loj hauv kev lag luam koob yees duab. Ob leeg ntawm cov qauv no muaj lawv tus kheej pros thiab cons. Lawv ob leeg muaj cov yam ntxwv tshwj xeeb, thiab tuaj yeem sib tw taub hau rau ib leeg. Kab lus no piv cov yam ntxwv tseem ceeb ntawm ob lub koob yees duab thiab sib tham txog qhov sib txawv ntawm lub koob yees duab, Nikon D7000 thiab Pentax K-5.
Lub tswv yim xaiv lub koob yees duab Digital
Kev daws teeb meem ntawm lub koob yees duab
Kev daws teeb meem ntawm lub koob yees duab yog ib qho ntawm cov yam ntxwv tseem ceeb uas tus neeg siv yuav tsum tau saib thaum yuav lub koob yees duab. Qhov no tseem hu ua tus nqi megapixel. Nikon D7000 muaj kev daws teeb meem ntawm 16.2 megapixels nrog 14 ntsis AD hloov dua siab tshiab. K-5, ntawm qhov tod tes, muaj qhov loj me me ntawm 16.3 megapixels nrog 4 channel tso zis. Ob lub sensors no yuav luag zoo sib xws, tab sis 4 channel tso zis ntawm Pentax K-5 sai dua Nikon.
YISO Performance
ISO tus nqi ntau kuj yog qhov tseem ceeb. ISO tus nqi ntawm lub sensor txhais tau tias, ntau npaum li cas rhiab heev lub sensor yog rau ib tug muab quantum ntawm lub teeb. Cov yeeb yam no tseem ceeb heev hauv kev txhaj tshuaj hmo ntuj thiab kev ua kis las thiab kev thaij duab thaij duab. Tab sis nce tus nqi ISO ua rau lub suab nrov hauv daim duab. Nikon D700 muaj ISO ntau yam ntawm 100 txog 6400 ISO, thiab muaj qhov nthuav dav ntawm 12800 thiab 25600 ISO. Pentax K-5 muaj ISO ntau yam ntawm 100 txog 12800 ISO, thiab muaj kev nthuav dav mus txog 51200 ISO. Hauv kev nkag siab ntawm ISO rhiab heev, K-5 yog ua ntej ntawm D7000
Frames Per Second Rate
Frames ib tus nqi thib ob lossis feem ntau hu ua FPS tus nqi kuj yog ib qho tseem ceeb thaum nws los txog rau kev ua kis las, tsiaj qus thiab kev yees duab. FPS tus nqi txhais tau hais tias, tus lej nruab nrab ntawm cov duab lub koob yees duab tuaj yeem tua ib ob ntawm ib qho chaw. Pentax muaj npe nrov rau kev ceev ntawm lawv lub koob yees duab. K-5 tsis yog ib qho kev zam. Nws muaj tus ncej zoo heev ntawm 7 fps, uas tuaj yeem tua tsis tu ncua rau 15 RAW duab lossis 40 JPEG cov duab. Hauv hom qeeb qeeb, tus lej ntawm JPEG cov duab tsuas yog nyob ntawm lub peev xwm ntawm lub cim xeeb. Lub D7000 muaj qhov sib tw fps tus nqi ntawm 6 ntas ib ob. Hauv chav haujlwm ceev, Pentax coj tus thawj coj hla Nikon.
Shutter Lag thiab Lub Sijhawm Rov Qab
A DSLR yuav tsis thaij duab sai li sai tau thaum lub kaw lus raug nias. Nyob rau hauv feem ntau cov xwm txheej, nws pib tsom thiab nws pib qhov ntsuas dawb yuav tshwm sim tom qab lub pob nyem. Yog li ntawd, muaj lub sijhawm sib txawv ntawm cov xovxwm thiab cov duab tiag tiag. Qhov no yog lub npe hu ua shutter lag ntawm lub koob yees duab. Ob tus qauv no muaj qhov nrawm nrawm heev thiab kev lag luam kaw tsawg tsawg. Tab sis Pentax sai dua Nikon thaum nws los txog rau kev tsom.
Number of Autofocus Points
Autofocus cov ntsiab lus lossis AF cov ntsiab lus yog cov ntsiab lus uas tau tsim rau hauv lub cim xeeb ntawm lub koob yees duab. Yog tias qhov tseem ceeb yog muab rau qhov AF point, lub koob yees duab yuav siv nws lub peev xwm autofocus los tsom lub lens rau cov khoom hauv qhov muab AF point. Nikon muaj 39 point AF system, uas muaj tus ntoo khaub lig hom 9 cov ntsiab lus txhawm rau ua kom lub teeb qis kom pom tseeb dua. Lub sijhawm no Pentax muaj kaum ib lub ntsiab lus autofocus nrog qhov tseeb autofocusing. Lub Nikon tsom qhov system qeeb qeeb dua li Pentax.
Nyhav thiab Dimensions
Pentax ntsuas 131 x 97 x 73 mm hauv qhov ntev thiab hnyav txog 750 grams. Lub D7000 yog me ntsis loj thiab hnyav; nws hnyav 780 grams thiab ntsuas 132 x 105 x 77 mm nyob rau hauv qhov ntev.
Cia nruab nrab thiab muaj peev xwm
Nyob hauv DSLR koob yees duab, lub cim xeeb inbuilt yuav luag negligible. Yuav tsum muaj cov cuab yeej cia sab nraud los tuav cov duab. Nikon D700 nta 2 SD daim npav qhov, thiab txhawb SD, SDHC thiab SDXC phaib. Pentax K-5 muaj SD daim npav qhov, uas txhawb SD thiab SDHC phaib.
Live Saib thiab yoog raws ntawm cov zaub
Live saib yog lub peev xwm los siv lub LCD ua tus saib pom. Qhov no tuaj yeem yooj yim vim tias LCD muab qhov pom tseeb ntawm daim duab hauv cov xim zoo. Ob lub Pentax K-5 thiab Nikon D7000 feature 3 nti LCD saib. Tsis muaj lub peev xwm sib txawv ntawm ob qho tib si.
Zaj lus
Pentax K-5 yog kim dua Nikon D7000 nta ntau txoj kev xaiv thiab ua tau zoo nyob rau hauv feem ntau cov mob. Tib qhov chaw uas Nikon ntaus Pentax yog xaiv AF point. Tsis tas li ntawd, ob lub koob yees duab yog cov kev xaiv zoo rau cov nyiaj.
