Yuav ua li cas yog lub zoom rau lub koob yees duab? Xaiv qhov zoo tshaj plaws Zoom

Xaiv thiab muas ib lub koob yees duab - nws yog ib tug nyuaj thiab lub luag hauj lwm: tsis tsuas yog hais tias nws yog tsim nyog los noj mus rau hauv tus account tag nrho cov kev kawm txog cov functions thiab ntaus yam ntxwv, yog li tseem yuav tau mus nrhiav xws li ib tug ntaus ntawv nyob rau hauv ib tug tsim nyog tus nqi ntau. Qhov loj tshaj yuam kev ib buyer - unquestioning tso siab rau cov lus ntawm kws pab tswv yim kev muag khoom hauv cheeb tsam. Raws li yog lub npe hu, lub ntsiab hauj lwm managers - ua muag khoom. Rau ib yam khoom zoo marketers yog advertising rau txawv tricks, xws li qhia nyob rau hauv qhov kev piav qhia ntawm lub twj paj nruag ntawm kuj zoo kawg tseem ceeb zoom, thiab zoo li cas ntawm zoom (kho qhov muag thiab cov) tsis qhia, hoping rau ib buyer incompetence. Kom tsis txhob tag nrho cov no thiab xaiv qhov zoo tshaj plaws kev ntsuas yog muaj nqis paub nyob rau hauv ua ntej txhua yam hais txog cov kev ua ntawm lub zoom thiab zoom ntau ntau yam.

Yuav ua li cas yog zoom?

Zoom (zoom) - qhov no yog ib tug tshwj xeeb parameter photodevices lens uas tso cai rau koj mus zoom, yog li ua lub deleted khoom. Nrog nws koj muaj peev xwm tua los ntawm ib tug deb ntawm cov hnub qub, zoom thiab coj cov duab txawm paj nyob rau hauv ib lub qhov rais rau lub 9 pem teb, txawm hais tias tshuaj ntsuam txog ntawm cov tub rog cov khoom thiab cov sib ntaus ntawm projectiles tsis muaj hlwb thiab lub cev raug mob.

Zoom nyob rau hauv lub focal ntev. FR - yog qhov ntev ntawm lub ya los ntawm nruab nrab ntawm lub lens mus rau lub matrix, piv txwv li, tus taw tes ntawm ua kom pom tseeb ... Nws txiav txim siab los nquam paj nquam nruas nyob rau hauv lub lens nyob rau hauv millimeters, piv txwv li, ib tug khub ntawm 5,8-24 hli xaus-npawb tsab: thawj tug ntiv - ib tug FR rau hauv lub luv luv kawg, thiab lub thib ob xov tooj - DF rau qhov ntev kawg. Yog hais tias peb tau faib cov xov tooj los ntawm tus xov tooj ntawm ntev RF luv luv, peb tau txais tus nqi ntawm zoom, sib npaug zos rau plaub.

cov zoom

Tam sim no hais tias peb paub dab tsi lub zoom yuav tsum to taub nws yooj yim ntau ntau yam: cov thiab kho qhov muag. Ib txhia cov koob yees duab muab thiab hais tias, thiab lwm yam ntau ntau yam.

Cov Zoom, thaum piv nrog rau cov kho qhov muag - yog ib yam ntawm cov ntawv tseeb, vim hais tias los ntawm nws cov kev siv ntawm ib yam khoom ntawm lub digital ua yuav tsum tau, tsis yeej qualitatively mus kev rau lub kwv nyob rau hauv cov kev yees duab. Scaling tshwm sim los ntawm kev ncab lub hauv paus yog ib feem ntawm qhov kev pab cuam daim duab raws li txwv kom txog rau thaum nws nce mus txog tus thawj ncej loj.

Yog hais tias cov zoom zoo kawg thiab, cov duab yuav muab ntau zog muaj tsawg tsis zoo, yog hais tias nws yog me me, ces qhov kev nce nyob rau hauv zoo yog poob irretrievably. Twb sau Me me quav tawg tsam yuav tsis tau qualitatively zoo, yog li ntawd tej dluab nrog ua xav pikseliziruyutsya.

Cuaj kaum, nws kom meej meej hais tias los ntawm kev siv cov zoom, koj yuav tau txais ib tug tsawg-zoo duab, rau cov ua vib this tsis sawv tseem, thiab pheej kev txhim kho. Piv nrog rau pab kiag li lawm cia li 7 xyoo dhau los, tam sim no cov koob yees duab ntawm cov kev kho mob kev pab cuam muaj peev xwm ho ua rau kom cov duab, uas ua rau nws thiaj li zoo, uas ncab yuav luag imperceptibly.

Yog hais tias koj yuav tsum yog tus zoom kom meej meej tsis txaus siab, koj ua tau yeej ib txwm yog lov tes taw los yog hloov lub chaw ntawm nws tus nqi.

kho qhov muag zoom

Xws li ib tug zoom - qhov no magnification los ntawm kev siv ntawm cov eyepiece. Los ntawm kev txo lub kaum sab xis kev ntsuam xyuas, t. E. Lub focal ntev, lub approximation yog ua nyob rau hauv cov kev yees duab khoom. Lub ntsiab kom zoo dua ntawm tus kho qhov muag zoom rau cov yog qhov tseeb hais tias cov duab yog tsam nyob rau hauv nws tsis yog txo inter-pixel yov, li ntawd, tus yees duab zoo yog tsis degraded.

Cov kab kev los ntawm focal lengths yuav pom ncaj qha rau ntawm lub lens. Ntawm cov hoob kawm, thaum xaiv ib tug lub koob yees duab , dua li cov coob tau tus nqi ntawm nws, qhov ntau hais tias cov kev lag luam yog tsis tsim nyog nrog cov kho qhov muag zoom rau lub chaw, cia "stamping" ntau thiab ntau sophisticated seev.

Superzoom - champions lub multiplicity zoom

Thaum lub sij hawm no, kho qhov muag 10 x zoom yuav surprise tsuas yog hais tias 80-xyoo-laus pog. Progress ntawm lub ntsej muag, thiab tam sim no tiam no twb dawb do txaus siab rau cov kev cog lus ntawm cov koob yees duab nruab nrog 50x zoom. Nws yog soj ntsuam tsis yog raws li ib tug txhob, tab sis raws li ib tug leap, dhia nyob rau hauv tiam ntev. Tseeb, dab tsi yog qhov cov zoom, muab piv nrog kho qhov muag super? Cog lus nrog zoom rau superior zoo duab twb ua tangible sib txeeb cumbersome poob lawm ntawm SLR thiab countless lo ntsiab muag uas kev pab txog nyob rau hauv hws dragged rau tag nrho cov yees duab tua. Lawm, muaj ntau yam ntawm cov kev "widgets" no mas haumxeeb photographic compact superzoom tsis hloov, tab sis nyob rau hauv cov nqe lus ntawm cov kev mus ncig thiab ergonomics, lawv muab lawv ib lub taub hau pib.

Vim lub fact tias cog lus thiab thiaj li muaj ib tug haib zoom lens ntawm lub koob yees duab tsis tau qhov kev tshem tawm / nruab nyob rau hauv thiaj li yuav nrhiav tau cov feem ntau tsim nyog nyob rau hauv ib tug yees duab shoot kom nws tiv thaiv cov plua tshauv los ntawm uas nkag mus rau lub matrix.

Zoom yog tseem tam sim no nyob rau hauv video koob yees duab. Lub siab heev tshaj plaws embodiment ntawm cov ntaub ntawv no yuav tsum superzoom phau ntawv zooming. Txawm txawm lub fact tias cov video koob yees duab nrog zoom - tam sim no yog tsis tshiab, tiam sis tus xub ntiag ntawm lub ntaus ntawv uas zoo sib xws muaj nuj nqi - qhov no yog ib tug tseem ceeb lawm.

Yog li, nws yog qhov zoo tshaj plaws xaiv ib tug ntaus nrog ib tug optical zoom los yog compact superzoom nrog. Koj twb paub dab tsi lub digital zoom thiab hais tias qhov no nce nyob rau hauv qhov zoo ntawm cov kev yees duab. Zoom yuav tsum tsis txhob yuav cov ntsiab vim li cas rau kev yuav khoom hauv lub tshuab, nws yog zoo dua mus yuav ib tug zoo lub koob yees duab, muab lub peev xwm los hloov lub optics. Nyob rau hauv cov ntaub ntawv no, yog hais tias tus muaj siab los yog lub ceev yuav tsum tau muaj vysokokratny zoom thaum kawg overwhelm koj, koj yeej ib txwm yuav tus uas tsim nyog lens.