Uma udidekile yi-"IS" engase ibekwe ekugcineni kwegama lekhamera yedijithali oyicabangayo, awuyedwa. I-IS, uma isetshenziswe ngekhamera yedijithali, ifushane "ubuchwepheshe bokuqiniswa kwesithombe," okuvumela ikhamera ukuthi ikusize ukunciphisa izithombe eziphazamisayo kusuka ekuthumeni kwekhamera.
Nakuba ukusimama kwesithombe sekhamera akusilo okusha, amakhamera amaningi edijithali amaningi ahlanganisa namanje ubuchwepheshe be-IS. Njengoba i-IS iba yanda kakhulu, kubalulekile ukwazi ukuthi uyithengani, njengoba ukusimama kwesithombe kutholakala kokulungiselelwa okumbalwa okuhlukile.
Ukulungiselelwa okuyisisekelo okuyisithupha kokuqiniswa kwesithombe sekhamera yedijithali yilokhu:
- I-Optical IS
- I-Digital IS
- I-Dual IS
Okuyisisekelo
Ubuchwepheshe bokuqiniswa kwesithombe kusetshenziswa i-hardware noma isofthiwe ngaphakathi kwekhamera yedijithali ukuze unciphise imiphumela yokushaywa kwekhamera noma ukudlidliza. Ukufiphaza kwekhamera kuvezwa kakhulu uma usebenzisa i-lens ende yokusondeza noma uma udutshulwa ezimweni eziphansi, lapho isivinini se-shutter sekhamera kufanele sibe khona ukuvumela ukukhanya okwengeziwe ukuze kufinyelele inzwa yesithombe sekhamera. Ngejubane elincane le-shutter, noma yikuphi ukudlidliza noma ukuzamazama okwenzeka ngekhamera kukhuliswa, ngezinye izikhathi kubangela izithombe ezifiphalayo. Ngisho nokunyakaza kancane kwesandla sakho noma ingalo kungabangela ukufiphaza okuncane.
I-IS ayikwazi ukuvimbela yonke isithombe esicacile-njengalapho isihloko sishukumisela kakhulu kakhulu isivinini se-shutter oyisebenzisayo-kodwa sisebenza kahle ngokulungisa ukufiphaza okubangelwa ukuhamba kancane komthwebuli wezithombe (akuzizwa kabi; unenkinga ngezikhathi ezithile). Abakhiqizi bokulinganisa i-IS bangakuvumela ukuba udonse izilungiselelo ezimbalwa ze-shutter speed kancane kunakho ongakwenza ngaphandle kwe-IS.
Uma ungenayo ikhamera ehlinzeka ngesistimu yokuqiniswa kwesithombe esihle, kuzomele uzame ukudubula ngesivinini esikhulu sokuvala, okungaba nzima ezimweni eziphansi zokukhanya. Zama ukwandisa ukulungiselelwa kwe-ISO yekhamera ukuze ukwazi ukudubula ngesivinini esishesha ngokushesha ekukhanyeni okuphansi uma ukulungiselelwa kwekhamera kungakunikezi imiphumela oyifunayo.
I-Optical IS
Kumakhamera we-digital compact ahloselwe abathwebuli bezithombe abaqalayo nabangaphakathi, ukuqina kwesithombe sokukhanya (ngezinye izikhathi kufushaniswe ku-OIS) yi-technology ekhethwayo ye-IS.
I-Optical IS isebenzisa ukulungiswa kwe-hardware ukuze kunqabe ukuzwakalisa ikhamera. Umkhiqizi ngamunye unamalungiselelo akhethekile wokusebenzisa i-optical IS, kodwa amakhemikhali amaningi adijithali aqukethe ukuqina kwesithombe okukhanyayo asebenzisa inzwa ye-gyro eyakhiwe ikhamera enquma noma yikuphi ukunyakaza kusuka kumthwebuli wezithombe. Inzwa ye-gyro ithumela izilinganiso zayo ngokusebenzisa ukuqiniswa kwe-microchip kuya ku-CCD, ehamba kancane ukuze ihlawule. I-CCD, noma idivaysi ehlanganisiwe, irekhoda isithombe.
Ukulungiswa kwe-hardware etholakala nge-optical IS yindlela ecacile kakhulu yokusimama kwesithombe. Akudingi ukwandisa ukuzwela kwe-ISO, okungenza ukwehlisa ikhwalithi yesithombe.
I-Digital IS
Ukuqiniswa kwesithombe se-Digital kuhilela kuphela ukusebenzisa isofthiwe nesimiso sekhamera yedijithali ukuze unciphise imiphumela yokushaywa kwekhamera. Ngokuyinhloko, i-digital Yandisa ukwanda kwe-ISO, okuyisilinganiso sokzwela kwekhamera ekukhanyeni. Njengoba ikhamera ikwazi ukudala isithombe kusuka ekukhanyeni okuncane, ikhamera ingadla ngesivinini esishesha ngokushesha, esinciphisa ukufiphaza kusuka ekubanjeni kwekhamera.
Kodwa-ke, i-digital IS ngokuvamile ivame ukwedlula ukuzwela kwe-ISO okungaphezu kwalokho okulungiselelwe okuzenzakalelayo kwikhamera kuthi kufanele kube yizimo zokukhanyisa kwesibhamu esithile. Ukwandisa ukuzwela kwe-ISO ngaleyo ndlela kunganciphisa ikhwalithi yesithombe, okwenza umsindo ozwakalayo kumsindo wesithombe yinoma iyiphi inombolo yamaphikseli alahlekile angayibhali kahle. Ngamanye amazwi, ukucela ikhamera ukuthi izame ukudala isithombe ezingaphansi kwe-ISO izilungiselelo zingangcolisa ikhwalithi yesithombe, futhi yilokho okwenziwa yi-digital.
Ezinye amakhamera futhi zibhekisela ekusimeni kwesithombe sedijithali ukuchaza isofthiwe esakhiwe ekhamera yedijithali ezama ukunciphisa ukufiphaza ngemuva kokuthatha isithombe, esifana nalokho ongayenza nge-software yokuhlela isithombe kukhompyutha yakho. Lolu hlobo lwe-digital IS lusebenza kangcono phakathi kwazo zonke izinhlobo zokusimama kwesithombe, noma kunjalo.
I-Dual IS
I-Dual IS ayiyona into elula ukuyibeka phansi, njengoba abakhiqizi beyichaza ngokuhlukile. Incazelo evamile kakhulu yokuzinza kokubili kwesithombe kuhilela inhlanganisela ye-hardware ukuqiniswa (etholakala nge-optical IS) nokunyuka kwe-ISO ukuzwela (njengoba kutholakala nge-Digital IS).
Ngezinye izikhathi, ukusimama kokubili kwesithombe kusetshenziselwa ukuchaza ukuthi i-digital SLR (i-single lens reflex) ikhamera iqukethe ubuchwepheshe bokuqiniswa kwesithombe kokubili komzimba wekhamera nasemalenzeni ayo aguquguqukayo
Ukusebenza ngaphandle kwe-IS
Amanye amakhamera ase digital asekudala akanikeli noma yiluphi uhlobo lwe-IS. Ukuze uvimbele ukuxilongwa kwekhamera ekhamera yedijithali enganikeli ukuqiniswa kwesithombe, zama lawa macebiso:
- Khweza ikhamera yakho ku-tripod.
- Sebenzisa i-viewfinder yekhamera, kunokuba i-LCD, uhlele ukudubula.
- Ziqine njengoba udubula ngokuzithelela odongeni noma uhlaka lwendlu.
- Hlanganisa ama-elbow akho eceleni komzimba wakho bese ubamba ikhamera ngezandla ezimbili.
- Shoot ngesivinini sokuvala ngokushesha, isikhathi esingeyona inkambo ewusizo.
Ungakhohlisi
Okokugcina, qiniseka ukuthi uyaqonda kahle ukuthi uyithengani uma kuziwa ekuqiniseni isithombe ekhamera yakho yedijithali. Abanye abakhiqizi, ikakhulukazi labo abanamamodeli aphansi, bazosebenzisa imigomo edukisayo, njengemodi yokulwa ne-blur noma ubuchwepheshe bokulwa nokuzamazama, ukuzama ukufihla iqiniso lokuthi ikhamera yabo ye-digital ayinikeli i-IS. Amakhamera anjalo avame ukwandisa isivinini se-shutter ukukhawulela izithombe ezinembile, ngezinye izikhathi ezibangela ezinye izinkinga zokungena, ngaleyo ndlela zilimaza ikhwalithi yesithombe.
Njengengxenye eyengeziwe, abanye abakhiqizi bekhamera zedijithali banegama lomkhiqizo othize lokuqiniswa kwesithombe sokukhanya, izinto eziyinkimbinkimbi ze-shopper (njengokungathi sidinga ukudideka okuningi). Isibonelo, ngezinye izikhathi i-Nikon isebenzisa "Ukunciphisa Ukuvimbela," futhi ngezinye izikhathi i-Sony isebenzisa i- "Super Steady Shot" ukubhekisela ku-IS ebonakalayo. I-Canon idale uhlobo lokusimama kwesithombe ngokuvamile olubhekisela ku-Intelligent IS.
Ngaphambi kokuthenga imodeli ethile, qiniseka ukuthi igama layo lomkhiqizo libhekisela ku-IS optical futhi akulona uhlobo lwe-digital IS. Kumele ukwazi ukuthola lolu lwazi kuwebhusayithi yomkhiqizi noma kumthengisi othembekile esitolo sakho sekhamera.
Amakhamera amaningi zedijithali zanamuhla afaka phakathi i-IS ebonakalayo noma ihlanganisa uhlobo oluthile lwe-IS elibili, ngakho ukuthola ikhamera efanele ukuhlangabezana nezidingo zakho zokuqiniswa kwesithombe akuyona into ephawulekayo yokukhathazeka njengoba kungenzeka ukuthi yayineminyaka eminingana edlule. Noma kunjalo, ukuba nesistimu yokuzinza isithombe esihle kubaluleke kakhulu empumelelweni yakho yekhamera yedijithali ukuthi kufanelekile ukuhlola kabili ikhamera yakho inhlobo engcono kakhulu ye-IS. Ungakhohlwa ukuhlola uhlu lwekhamera lokucacisa uhlobo lokusimama kwesithombe olutholakala!