Kuvandudza kupfeka kwako nekusarudza lens yakarurama
Focal urefu ndiro izwi rinokosha mumapikicha uye mumashoko aro akajeka iyo ndiyo munda wekuona imwe lens kamera.
Nzvimbo yakatarisa inotarisa kuti yakawanda sei nzvimbo iyo kamera inoona. Inogona kusiyana kubva kumativi akareba zvinogona kutora munzvimbo yose kune telephoto lenses iyo inogona kudonhora pane nyaya duku iri kure.
Pakupfura nemhando ipi zvayo yemakamera, asi kunyanya DSLR kamera, zvinokosha kuti uve nekunzwisisa kwakanaka kwehukuru hurefu. Nechimwe ruzivo rwemashoko, iwe unogona kusarudza lens yakarurama pane imwe nyaya uye uchaziva kuti chii chaunotarisira kunyange iwe usati watarisa kuburikidza nekuona .
Ichi chinyorwa chichakubatsira kuti unzwisise urefu hukuru uye tsanangura kukosha kwehukuru hukuru mukudhijita yekudhijita.
Chii chinonzi Focal Length?
Heino tsanangudzo yesayenzi yehupamhi hwepamusoro: Kana chiedza chakafanana chechiedza chichirova lens rinotarisa kusingaverengeki, vanotendeuka kuti vagadzire chinangwa. Nzvimbo yakakosha ye lens iri kure kure kubva pakati pe lens kuenda kune ino.
Nzvimbo yakatarisa ye lens ichave yakaratidzwa pamuranda we lens.
Mitauro yeLenses
Lenses inowanzorongwa se-wide-angle, standard (kana inowanzo), kana telephoto . Nzvimbo yakakwirira ye lens inotarisa maonero ekuona, saka yakareba-angle lenzi ine zvishoma zvishoma urefu apo telephoto lenses ine urefu hukuru hwekureba.
Heino runyora rwemashoko ekugamuchirwa kwemaonero ekugadzirisa munhengo imwe neimwe ye lens:
- Pasingapfuuri 21mm: Super wide-angle lens
- 21-35mm: Wide-angle lens
- 35-70mm: Standard / Normal lens
- 70-135mm: Terera Telephoto
- 135-300mm (kana kupfuura): Telephoto
Zoom vs Prime Lenses
Kune marudzi maviri emarangi: prime (kana yakasarudzwa) uye tsvaira.
- A prime lens ichange iine imwechete yepamusoro (eg 50mm).
- A zoom lens ichafukidza hukuru hwema focal (eg 17-40mm).
Zoom Lens Kubatsira
Zoom lens inoshandiswa nokuti unogona kukurumidza kuchinja marefu ekureba apo uchitsvaga kuburikidza nemuoneki uye haufaniri kutakura kamera yekhamera yakazara nemarangi. Vanyori vese vanoita zvemafirimu zvema digital vanogona kutarisana nemirairo imwechete kana maviri inosvitsa yakazara huwandu hwakazara hwehukuru hurefu.
Chinhu chimwe chete chokufunga, zvisinei, ndechekukura kwehuwandu hunodikanwa mune imwe svondo yezvesiti. Kune mavhisi akawanda anobva 24mm kusvika 300mm (uye chero kupi mukati mukati) uye izvi zviri nyore chaizvo.
Nyaya yacho inowanzova yegirasi iri mune idzi lenzi nekuda kwehuwandu hwomukati, pane zvimwe zvinhu izvo chiedza chinofanira kufamba nacho. Kana iwe uchida chimwe chezvinhu izvi zvakasimba zvema-lenses uye unoda mifananidzo yakanakisisa yepamusoro, zvingava zvakanaka kushandisa mari yakawanda pamusoro pe-lens-quality.
Prime Lens Advantages
Prime lens rine mazano maviri makuru: unhu nekukurumidza.
Nokukurumidza, isu tiri kutaura pamusoro pekuvhara zvakanyanya (f / stop) yakavakwa mujeri. Pachitsiko chezasi (nhamba shomanana, kuvhura kukuru), unogona kutora mukunyorera kwakadzika uye shandisa kasivha yevhavha inokurumidza kumira. Ichi ndicho chikonzero f / 1.8 inoshuva kufarira mu lenzi. Zoom lenzi haigoni kuwana izvi nokukurumidza uye kana ikadaro, inodhura zvikuru.
Iko-prime lens inowanzoitawo nyore pakuvaka kupfuura kuvhenekera lens nokuti pane zvishoma zvigadzirwa zvemukati mukati mebhari uye hazvidi kuti zvigadzirise kuchinja urefu hwepakati. Girazi shoma kuti uende kuburikidza zvinoreva kuti pane mikana shoma yekusavhiringidza uye izvi zvinowanzopa mufananidzo wakajeka uye wakajeka.
Focal Length Magnifier
Iyo yakareba urefu hwemarangi yakadzorerwa kumashure mumazuva ekufambisa mafirimu uye inoratidzika nehupamhi hwema lens pane 35mm kamera. (Ramba uchiyeuka, kunyange zvakadaro, kuti 35mm rinoreva rudzi rwefirimu rinoshandiswa uye kwete ruzivo rwakanyanya!) Kana iwe uine mukana wakakwana wekuita imwe yezvenyanzvi dzakakwana-DSLRs, ipapo hukuru hwako huchave husina hanya.
Kana, zvakadaro, iwe unoshandisa chirimwa chemazi (APS-C) kamera, ipapo hukuru hwako huchakanganiswa. Nemhaka yokuti masimiro emagadziro ezvirimwa zviduku kudarika 35mm kubvisa kwefirimu, kukudzwa kunofanira kushandiswa. Kukura kunoparadzanisa zvishoma pakati pevakagadziri, asi muyero i x1.6. Canon anoshandisa kukudzwa uku, asi Nikon anoshandisa x1.5 uye Olympus anoshandisa x2.
Somuenzaniso, pane Canon chitubu ikamera kamera, mureza we 50mm lens inova telephoto 80mm lens. (50mm yakawedzerwa nechimwe chei 1.6 kuunza 80mm.)
Vazhinji vakugadzira iko zvino vanoita lensisi iyo inobvumira kukudzwa uku, iyo inoshanda chete pazvirimwa zvemakamuri makamera. Izvi zvinonyanya kukosha pamakona ekupedzisira-zvinhu, apo kukudzwa kunogona kuchinja majekiseni aya kuva akaenzana!