Video: Dab tsi yog lub lens tsom iav?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
a khoom lens yog a tsom iav uas los ntawm lub koob yees duab thaum koj yuav nws. Feem ntau nws yog zoom tsom iav nrog normalfocal ntev thiab me me aperture. feem ntau ntawm cov koob yees duab qoob loo muaj 18 -55mm f 3.5–5.6 tsom iav raws li khoom lens.
Ntxiv mus, 18 55mm lub lens zoo rau dab tsi?
Cov 18 hli yog qhov nruab nrab qhov dav uas zoo rau toj roob hauv pes, kos duab thiab ib puag ncig duab. Cov 55mm ua kawg yog luv luv telephoto tsom iav zoo tagnrho forcompressing foundations thiab noj portraits los yog kaw nyob rau hauv ondetails.
Kuj Paub, qhov sib txawv ntawm qhov tseem ceeb lens thiab cov khoom siv lens yog dab tsi? Cov qhov sib txawv ntawm a khoom & ib thawj yog a thawj yog qhov ntev ntev (lub ntsiab lus nozoom) thiab feem ntau muaj qhov siab tshaj plaws aperture (me me # zoo li 1.8). A cov lens yog zoom tsom iav (feem ntau 18-55 hli ) thiab muaj qhov sib txawv ntawm qhov siab tshaj plaws (3-5.6 nyob ntawm koj lub focallength).
Tsis tas li ntawd, lub lens prime siv rau dab tsi?
1. Ntau Lub Teeb. Ib qho txiaj ntsig loj rau kev siv primelenses yog tias lawv muab txoj hauv kev rau koj tso lub teeb pom kev ntau rau koj lub koob yees duab vim tias lawv muaj qhov dav tshaj qhov dav. Simplyput, lub qhov nyob rau hauv lub tsom iav tuaj yeem qhib dav dua, thiab ntau lub teeb tuaj yeem nkag mus rau hauv lub koob yees duab thaum lub qhov rooj qhib.
Dab tsi yog lub lens ci ntsa iab?
Digitally Nto Lenses . Hauv kev sib piv, digitally nto lenses yog cov ntsiab lus siab lo ntsiab muag uas yog tsim nrog cov cuab yeej siv niaj hnub, siv lub pob zeb diamond-pointlathe cutter tswj los ntawm computer software. Cov ntawv sau tshuaj tau sau rau sab nraum qab ntawm daim ntawv tsom iav dawb paug
Pom zoo:
Dab tsi yog tsom iav tsom iav?
Kev tsom me me tshwj xeeb yog cov txheej txheem kev yees duab uas tsis nthuav dav uas tso cai rau koj kom pom kev thiab txheeb xyuas lub qhov muag qhov muag. Siv lub computer-pab morphometry, niaj hnub specular tsom tsom xam qhov loj me, cov duab thiab cov pejxeem ntawm cov endothelial cells
Kuv puas tuaj yeem muab kuv cov iav tsom iav los ua tsom iav?
Yog, koj tuaj yeem ua tau. Koj cov tsom iav RX ib txwm tuaj yeem pleev xim rau ib qho xim uas koj xav tau thiab ua rau koj ib khub tsom iav tsom iav. Tsuas yog coj koj lub tsom iav mus rau lub khw muag khoom kho qhov muag hauv cheeb tsam thiab ua rau koj cov iav tsom iav. Nws yog qhov ua tau rau koj kom koj cov iav tsom iav tsis tu ncua
Vim li cas qhov sib txawv hauv qhov tsom iav tsom iav tseem ceeb heev?
Qhov sib piv: Lub tshuab tsom me me yog ua kom lub ntiaj teb me me pom rau tib neeg qhov muag. Txhawm rau ua qhov no kom tiav, tib neeg lub qhov muag yuav tsum muaj peev xwm pom qhov txawv ntawm ib qho piv txwv los ntawm nws ib puag ncig. Qhov sib piv zoo dua, nws yooj yim dua yog pom qhov sib txawv hauv cov duab
Vim li cas lub tshuab tsom iav hu ua lub tshuab tsom me me?
COMPOUND MICROSCOPES thiaj li raug hu vim tias lawv tau tsim nrog cov kab ke sib xyaw ua ke. Lub hom phiaj lo ntsiab muag muab thawj qhov kev nthuav dav uas yog compounded (multiplied) los ntawm ocular lens (qhov muag)
Cov iav tsom iav tiv thaiv ua dab tsi?
Anti-fatigue lo ntsiab muag yog tsim los kho cov tsos mob. Sab saud ntawm lub lens muab kev kho qhov muag tsis pom kev zoo ib yam (ib yam li kev saib ib leeg ib leeg nkaus xwb), tom qab ntawd muaj qhov hloov pauv me me ntawm lub zog mus rau ntawm lub hauv paus kom txo tau qhov nyuaj ntawm kev ua haujlwm ze