Sigma 300mm f / 2.8 iyo 400mm f / 2.8 lenses isboorti oo dhowaan soo socda

Muraayadaha cusub ee 'Sigma 300mm f / 2.8 OS' iyo '400mm f / 2.8 OS lenses' ayaa lagu xantaa in lagu dhawaaqo mararka qaar 2014 si loola tartamo noocyada qaaliga ah ee Canon iyo Nikon.

Sigma wuxuu sameynayay lenses telephoto dhaadheer in mudo ah. Moodh 300mm f / 2.8 ah ayaa wali laga heli karaa Amazon $ 3,399, halka qaabka 400mm f / 5.6 laga heli karo eBay qiimayaal kala duwan iyadoo kuxiran gobolka sheyga.

Sigma 300mm f / 2.8 EX DG IF HSM APO lens ayaa lagu xantaa in lagu badalayo lens 300mm f / 2.8 ah oo cusub mararka qaar sanadka 2014.

Sigma 300mm f / 2.8 iyo 400mm f / 2.8 lenses isboorti shaqooyinka, waxaa laga yaabaa in lagu tijaabiyo Sochi 2014 Winter Olympics

Shirkada Japan ayaan dooneynin inay ka quusato qeybtan waxayna ujeedadeedu tahay inay soo bandhigto wanaag cusub mustaqbalka deriska ah. Sida laga soo xigtay ilo gudaha ah, Sigma 300mm f / 2.8 iyo 400mm f / 2.8 lenses isboorti ayaa si rasmi ah loo soo bandhigi doonaa sanadka 2014.

Optic-yadaani waxay ku jiraan gacanta tijaabiyaasha, laakiin waxaa laga yaabaa inay qayb ahaan u baxaan dadweynaha Sochi 2014 Ciyaaraha Olombikada ee ka dhacaya Ruushka. Haddii aad tahay qof jecel indha indheeyayaasha, markaa waxaa laga yaabaa inaad u baahato inaad sawirradaada eegto waxaadna nasiib u yeelan kartaa inaad aragto mid ka mid ah muraayadaha indhaha.

Sigma wuxuu u diyaar garoobay inuu soo bandhigo muraayadaha indhaha 500mm iyo 800mm waqti dhow, sidoo kale

Sigma wuu sii qoto dheeraan karaa muraayadaha indhaha ee isboortiga. Sida muuqata, waxaa jira laba nooc oo kale oo shaqooyinka ah, oo bixinaya dherer diiradda 500mm iyo 800mm, halka hadaladii udambeeyay lagu sheegay muraayad 600mm f / 4 muraayad ah.

Sawir qaadayaashu waxay horeyba uga heli karaan suuqa 500mm f / 4.5 iyo 600mm f / 8 iyagoo taageero ka helaya guryo farabadan, oo ay kujiraan Canon, Nikon, Sony, Sigma iyo inbadan.

Moodooyinka cusub ee 500mm iyo 600mm waxay bixin doonaan furitaanka ugu badan ee f / 4. Dhanka kale, dhalaalka unugga 800mm weli lama oga, ugu yaraan illaa inta xanta ay daaha ka rogeyso.

Patent-ka Sigma 300mm f / 2.8 lens-ka APO oo dhowaan la helay

Muddooyinkii ugu dambeeyay, waxaa la ogaaday in Sigma uu shatiyeeyay muraayad cusub oo 300mm f / 2.8 APO ah. Patent-ka waxaa la xareeyay Sebtember 4, 2012 waxaana la ansixiyay Oktoobar 24, 2013. Haddii ay si dhab ah suuqa u timaaddo 2014, markaa waxay ka dhigan tahay in shirkaddu ay si wanaagsan u maamushay badeecadan

Sigma patent-kiisii ​​ugu dambeeyay ee la ansixiyay wuxuu qeexayaa cabirka muraayada qiyaastii 190mm oo leh 14 qaybood oo loo qaybiyay 10 koox. Waxaa jira shan walxood oo ED ah iyo hal cunsur oo 'FLD element' ah, oo ay tahay inuu yareeyo cilladaha indhaha.

Sida caadiga ah, kani waa uun kutiri kuteed waana inaad ku qaadatid cusbo milix ah. Si kastaba ha noqotee, way fiicantahay in la maqlo in Sigma uu isku dayayo inuu u keeno muraayadaha indhaha oo dhaadheer oo dheereeya dadka badan, maaddaama moodooyinka Nikon iyo Canon ay leeyihiin qiimo jaban.