EFL (Effective Focal Length), iyo inoreva hurefu hwefocal hunoshanda, inotsanangurwa sechinhambwe kubva pakati pelenzi kusvika pakanangana nepakati. Mudhizaini yekuona, kureba kwakaiswa mumufananidzo-parutivi kureba kwakatarisana uye chinhu-parutivi kureba kwakatarisana. Kunyanya, EFL ine chekuita nemufananidzo-parutivi kureba kwakatarisana, kureva, chinhambwe kubva pamufananidzo-padivi ndege huru kusvika padivi pemufananidzo. Seimwe yeakakosha ma paramita mu optical system dhizaini, EFL inonyanya kupesvedzera mashandiro ehurongwa. Kureba kwekutarisa kwakapfupika kunogona kukonzera nzvimbo yakapamhama yakanyanyisa yekona yekuona, zvichiita kuti kunyanye kukanganiswa uye matambudziko pakudzora kona yekubuda kwemwaranzi mukuru. Sezvineiwo, kureba kwakarebesa kunogona kukanganisa compact system dhizaini uye kutadza kuzadzisa zvinodiwa zvekushandisa nekuda kwenzvimbo yakatetepa yekuona.
BFL (Back Focal Length), kana kuti optical back focal kureba, inotsanangurwa sechinhambwe kubva kumashure kweyekupedzisira lenzi mune optical system kuenda kundege yemufananidzo. Seyakakosha parameter mukugadzirwa kwemaziso, BFL inobata zvakananga hurefu hwehurongwa hwese uye nekurongeka kwekureba kwekumashure. Naizvozvo, inofanirwa kunyatsotariswa panguva yekugadzira system.
FFL (Front Focal Length), kana kuti optical front focal kureba, inomiririra chinhambwe kubva kumberi kwelenzi yekutanga muoptical system kusvika kune chinhu. Zvakakosha kuziva kuti FFL inosiyana zvakanyanya kubva kuFBL (Flange Focal Length). Yekutanga inoreva chinhambwe chekuona, nepo chekupedzisira chichireva nhambwe yemuchina.
FBL (Flange Focal Length), kana kuti flange focal kureba, inotsanangurwa sechinhambwe kubva pachekupedzisira mechanicha pamusoro kusvika pamufananidzo weboka re lens. Mukugadzirwa kwekamera uye lens interfaces, FBL ndiyo yakakosha paramende inotaridza nzvimbo chaiyo inoiswa lens pacamera.
Muchidimbu, aya ma paramita akakosha mukugadzirwa kwema lens optical. Ivo havangopesvedzere zvakananga kuita lens uye yekufungidzira mhando asi zvakare zvinokanganisa zvakanyanya kugona kwehurongwa hwekugadzira.
Nguva yekutumira: Jun-06-2025