Thatha izakhono zakho zokuthatha iphepha kwizinga elilandelayo
Xa kuziwa kwii-lens ezinkulu, i-spec ebonakalayo ebaluleke kakhulu ukuba ibhekise kuyo ubude obuphambili, oboniswe kwimilimitha. Iinjongo ezininzi ezibanzi zichazwa njengokuba zide ubude obungama-35 mm okanye ngaphantsi, kwaye zinokuba ziyinhloko okanye iilensi zokusondeza. Kodwa ngaphambi kokuba unciphise ubude obunzulu obufunayo, kufuneka uqinisekise ukuba ngokuqinisekileyo uhambelana nekhamera yakho, enokuthi ingahambelani nayo nayiphi na ilensi. Emva kokuba ubeke isikwele esi sikwele, ungaqala ukugxila kwizinto ezongeziweyo, njenge-prime okanye zoom, uhlobo lwe autofocus kunye nezicwangciso zokuvula. Ngezantsi, siye saqulunqa uluhlu lwezinye iilone eziphezulu kakhulu ze-Canon , i-Nikon kunye nezinye iikhamera.
Ukudibanisa imilingo ye-angle-wide angle-angle kunye ne-low-light performance, i-Canon EF 16-35mm f / 4L I-USM lens iyinkululeko enkulu kwi-Canon DSLR. Ukubandakanya ukuLungiswa koMfanekiso woBuchule, iingubo ezikhethekileyo zokunciphisa ukuqhuma kunye nezinto ezimbini ze-UD ukunciphisa ukuchithwa kwemifanekiso, i-Canon inezela ekugxinineni kwangaphakathi kwaye i-USM ixhomekeke ekujoliseni ngokuchanekileyo nangokukhawuleza. Ugxininiso lwexesha elipheleleyo lusetyenziswa ngokukhawulelana ubuncinane bee-0.92 iinyawo kulo lonke uluhlu lwesondlo.
Eyakhelwe kuyo yonke imeko yemozulu, le lensi ye-Canon yinto engasothuli kunye nokunganyangeki kwamanzi, okwenza ukuba kusebenze kwiimeko zombini zobugcisa kunye nabasebenzisi rhoqo. Ngaphandle kokukhuselwa kumacandelo, ukuvulwa kweseyhula ye-Canon lens kunye neentsimbi zaso ezithoba kuvumela iifoto ezimnandi, ezithandekayo kwimifanekiso.
Iziphumo zidumisa ukusebenza kwayo kunye nemiphumo yomfanekiso phantsi kweyona ndlela yokukhanya kunye nemeko yezithombe. Kwimizuzu engama-1.4 kuphela, i-Canon EF 16-35mm lens iya kuba ngokukhawuleza ibe yi-Canon DSLR.
I-go-to choice kubabaninzi be-Canon DSLR, i-EF S 10-22m f / 3.5-4.5 inomxholo wokubaluleka komfanekiso kunye nokukwazi ukukwazi ukukwazi ukukwenza ukuba kube yinto ekhethileyo yokwenza ilensi yansuku zonke. Ukubandakanya uzinzo lwe-optical image, i-autofocus ephakamileyo kunye ne-full-time manual yokugxila kunye nokujika okulula kwendandatho kufaka umlilo kumlilo onokuthi i-lens ye-Canon iyimfuneko.
Ngomgama omncinci wamasentimitha ama-9.5 ukugxila ngokukhawuleza, izifundo ezincinci njenge-3.6 x 5.4 intshizi zingazalisa isakhelo. Ubungakanani obuyinkimbinkimbi bunalo lens elilingana no-0.85 iipounds, okwenza kube ngaphezu kokukhanya okwaneleyo ukuza kuhamba ngesikhwama. Iimbalo ezibanzi ukusuka kwindawo ekujoliswe kuyo kule lens zibophezele ukuba ziveze nakwizithombe zabachwephesha ngokulinganisela kwi-zoom ye-16-35mm. Izixhobo ezintathu ze-lens aspherical, i-Super-UD kunye ne-USM ye-ring-type yonk
Nangona kungekho mzobo ozinzile owakhiwayo, ukwakheka okulula kukufanele kukuncede ukugcina le lensi igxilile esandleni sakho njengoko uthabatha umtshato womtshato, umcimbi wezemidlalo okanye umfanekiso wesimo sepaki.
I-lens entle kunzima ukuyifumana kwixabiso elincinci, kwaye ukuba uyakwazi ukufumana enye, ufuna ukuqinisekisa ukuba awuyikutshala imali kwizinto eziza kuquba kwiinyanga ezimbalwa nje. Kungenxa yoko, xa uthetha nge-"budget" lens, uthetha ngokuthe ngqo malunga nexabiso lentengo malunga ne-150 ukuya kwi-200. Phakathi kwezi iilensi, i-Nikon AF-S i-DX NIKKOR 35mm f / 1.8G lens mhlawumbi iyona ndlela ibhejethi ephezulu kakhulu ye-angle-angle angayifumana iikhamera ze-Nikon. Inokulinganisa ububanzi obude obubanzi beekhilomitha ezingama-35mm, ezihambelana ngokubhekiselele kweso luntu. Oko kuthetha ukuba imifanekiso iza kubonakalisa ngokusondelene noko ucinga-oko kukuthi, ukuba uyazi ukuba wenza ntoni. Eli lens lens ibuye libe nefuthe eliphezulu le f / 1.8 kwaye ubuncinci b / 22. Kukhona i-autofocus ye-ultrasonic autofocus (AF) enexesha elipheleleyo elijoliswe kuyo. Yaye yonke loo nto inokufunyanwa nje ngaphantsi kwama-$ 200.
Ukusebenza okuphezulu kunabo bonke ububanzi obukhoyo namhlanje, i-Sigma 8-16mm f / 4.5-5.6 DC HSM FLD AF yinto ekhethekileyo kwiCanon, Nikon, iPentax kunye ne-Sony DSLR. I-lens ye-one-a-kind-kind, i-Sigma yowokuqala ukunika ubude obude bendawo ye-8mm nje. Eyilwe ngeefayile ze-APS-C engqondweni, i-lens inikeza inkalo efanayo yeembono kwi-lens 12-24mm.
Ukudibanisa izinto ezintsha zeglasi ze-Sigma, i-lens inceda ukuhlawula ukulungiswa kombala kunye nokulungiswa kombala ngelixa uvelisa iziphumo zomfanekiso ogqwesileyo kuyo yonke i-zoom zoom. Ukufakwa kwetheknoloji ye-HSM kuvumela ukuba ukutsalonga kwe-autofocus ibe yinto yomatshini kunye nencwadana enomlinganiselo ophantsi wokugxilwa kwe-9.4 intshi nje ukusuka kwisifundo.
Ekugqibeleni, iSigma iye yavelisa i-lens ehamba phambili ekudutshulweni komhlaba, ekuthathweni kwezakhiwo, ekwakhiweni kwangaphakathi, e-photojournalism, ekufotweni komtshato nangaphezulu. I-1.22-pounds ubukhulu kunye no-4.17 intshi ubude buyenza ibe yinto ehambelanayo kwaye iphathekayo, ngoko ihambelana ngokufanelekileyo kwisibhakabhaka sebusuku, isikhwama sesikhwama okanye isikhwama sekhamera esinikezelwe.
Ukuba ufuna ukukwazi ukubamba ubuqaqawuli obumangalisayo beGrand Canyon okanye enye i-vista ebonakalayo, mhlawumbi ufuna i-lens ultra-angle angle, echazwe ngokuqhelekileyo njengalo naliphi na ilensi enexesha elifutshane elide elide kune-15 mm. Kwababantu abahlaselayo bakaNicon, kukho iSigma 10-20mm f / 3.5 EX DC HSM. Uluhlu olusisigxina kunye nenqanaba elifutshane elifutshane elikufutshane lenza kube lula kumhlaba kunye noyilo lwezakhiwo, kodwa kunokuba lufanelekile ukulungelelanisa abachwephesha beemifanekiso. I-motor-sonic motor ye-autopocus ekhulile kunye ne-autofocus enokukhawuleza, kunye ne-petal-type hoode ekhupha ukukhanya okukongeziweyo kwaye inciphise ukucinga kwangaphakathi. Kuyi-lens ephakathi kwinqanaba elisezantsi, kodwa ubuchwepheshe emva kwezi zixhobo ezincinci kuya kuqinisekiswa nakwizithombe ezivuthiweyo. Kukho nezitayela zeCanon, iPentax kunye ne-Sony DSLRs. Kungenokuba yinto efanelekileyo yokuhamba, i-lens-purpose goal, kodwa ngokuqinisekileyo ikhethi elifanelekileyo yokuqokelela iilensi.
Olunye uhlobo olukhethiweyo lwebhajethi lwabahlaseli be-Canon, i-EF-S 24mm f / 2.8 STM ihambelaniswe ngokuthe ngqo kwi-category-angle angle. Ibude obude be-24 mm kunye nokugqithiswa okukhulu kwe f / 2.8. Ngokwenene i-lens encane kakhulu kwaye ilula kakhulu kwi-EF-S yee-lens ze-Canon. Kuye kugxininiswe ngokukodwa kwesikhokelo kwixesha elithile kwi-One Shot AF (autofocus). Ivelisa imifanekiso ye stellar nge-autofocus ngokukhawuleza, kwaye yincinci ngokwaneleyo ukuba ifaneleke kuyo nayiphi na isikhwama. Ixabiso linjalo ukuba awunakukhathazeka kakhulu ngokuzisola ngokuthenga, ingakumbi ukuba unomfaki-zithombe osebenzayo onokubamba i-lens enkulu. Khawuqwalasele olu khetho oluqinileyo ukuba ungumqhubi weCanon ukhangele ukuthenga i-lens yakho yokuqala ye-angle, kodwa awufuni ukuchitha imali eninzi.
I-Sigma iphuculwa ngokutsha kwayo ye-premium ye-Mark II ye-premium-angle-angle zoom zoom kunye ne-Art edition entsha. I-lens yezemidlalo yecala yokusabalalisa i-glass ne-multilayer yembatho eyanciphisa ukuphazamiseka kwaye ivelise enye into ehlukileyo. I-lens nayo ihlala ihlala ikhona, kunye neengubo zokuphefumula kunye nezinto zangaphambili nangemuva kunye ne-sealed-sealed mounting.
Olunye uphuculo olutshintsho luguqula ukuvulwa kusuka kuf af / 4-5.6 ukulinganisa okuguquguqukayo ukuya kwi-f / 4 rhoqo, leyo, kunye neendlela ezininzi eziphuculweyo zendlela, ivelisa izibheno ezinqabileyo zomhlaba. Ekubeni i-f / 4 isuka kulo lonke uluhlu lwe-zoom, luyeke ukukhanya okupheleleyo kunaphambili ngaphambi kokuba unike iifoto zabafoto ngokukhawuleza ngokukhawuleza ukuvavanya okuninzi kwimifanekiso yendalo kunye nezokwakha. I-lens ine-4.9x yokukhulisa, nge-Hyper-Sonic Motor iteknoloji evumela ukuba i-autofocus ikhule kwaye ikhawuleze xa ifunyanwa imifanekiso kude.