Pentax 645D vs K-r | Pentax K-r vs 645D Nta, Kev Ua Haujlwm Sib Piv
Pentax yog lub npe loj hauv kev lag luam koob yees duab. Pentax K-r thiab 645D yog ob lub koob yees duab sib txawv heev. Pentax 645D yog tus kws tshaj lij DSLR, thaum Pentax K-r yog qib nkag DSLR. Kab lus no piv qhov sib txawv ntawm Pentax 645D thiab Pentax K-r. Pentax 645D poob rau hauv qeb ntawm cov koob yees duab nruab nrab cov koob yees duab, uas yog qhov zoo dua li cov koob yees duab DSLR li niaj zaus.
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. Pentax 645D yog ib lub koob yees duab zoo tshaj plaws DSLR koob yees duab muaj muag. Nws muaj qhov zoo kawg 40 megapixel sensor. Ntawm qhov tod tes, Pentax K-r muaj 12.4 megapixel sensor. Ntawm qhov kev sib piv ntawm kev daws teeb meem, Pentax 645D yog txoj kev ua ntej ntawm K-r.
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. Pentax K-r muaj ISO ntau yam ntawm 200 txog 12800 nrog rau kev teeb tsa nthuav dav ntawm 100 txog 25600 ISO qhov tseem ceeb. Ntawm qhov tod tes, 645D muaj ntau yam ntawm 200 mus rau 1000 nrog kev nthuav dav ntawm 100 txog 1600. Qhov no yuav zoo li qhov tsis ncaj ncees ntawm ISO rhiab heev, tab sis nrog qhov zoo ntawm optics hauv lub koob yees duab no tuaj yeem pab koj kov yeej nws.
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 naj npawb ntawm cov duab lub koob yees duab tuaj yeem tua ib ob ntawm ib qho chaw. Pentax K-r yog lub koob yees duab ceev heev rau nws tus nqi. Nws muaj qhov zoo tshaj plaws fps tus nqi ntawm 6 ntas ib ob. Tab sis txij li thaum 645D muaj lub sensor loj thiab cov ntaub ntawv uas yuav tsum tau ua ib daim duab kuj loj heev nws muaj tus ncej qeeb heev ntawm kwv yees li 1.1 fps.
Shutter Lag thiab Lub Sijhawm Rov Qab
A DSLR yuav tsis thaij duab sai li sai tau thaum lub kaw lus raug nias. Hauv feem ntau ntawm 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. Pentax cov khoom lag luam tau nrawm heev. Ob lub koob yees duab no muaj lub kaw lus me me heev.
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. Ob lub koob yees duab muaj 11 point autofocus system. Lub 645D muaj qhov tseeb autofocus system; nws yog tus kws tshaj lij thiab superfast. K-r, uas yog qib nkag DSLR, muaj qhov system autofocus, uas tsim nyog rau nws tus nqi.
Nyhav thiab Dimensions
Lub Pentax 645D yog qhov loj heev thaum piv rau K-r. 645D ntsuas 156 x 117 x 119 mm hauv qhov ntev thiab txog 1500 g hauv qhov hnyav. Tab sis K-r ntsuas 25mm x 97mm x 68mm hauv qhov ntev thiab 525 g hauv qhov hnyav.
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. Lub 645D siv ob qhov ntawm SD / SDHC phaib ua chaw cia, K-r tsuas muaj ib qho xwb.
Battery Life
Lub roj teeb lub neej ntawm lub koob yees duab tseem ceeb heev. Nws qhia peb txog kwv yees tus naj npawb ntawm cov duab uas tuaj yeem coj mus rau hauv ib qho nqi. Qhov no yog qhov tseem ceeb heev hauv kev yees duab sab nraum zoov qhov twg lub hwj chim tsis yooj yim. K-r tuaj yeem nqa txog 1000 daim duab nrog ib tus nqi thiab 645D tuaj yeem nqa txog 800.
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 koob yees duab no tau pom nyob.
Zaj lus
Pentax 645D yog lub koob yees duab tshaj lij, qhov Pentax K-r yog qib nkag DSLR. K-r yog qhov hnyav hnyav thiab ceev ceev. 645D muaj cov duab zoo heev. Lub 645D yog lub koob yees duab nruab nrab tus nqi qis heev, tab sis nws tseem yog kaum npaug kim dua li K-r.
