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Chp nh Macro - tht n ginNgi gi:admin- 12/06/2006 - Chuyn mc:Cc tnh hung chp nh

In trang ny

Bi vit ca thanhcong67 vi li vn mc mc v d hiu gip cc bn lm quen vi th loi chp nhmacro

Chp nh Macro - tht n gin

Cho cc anh ch v cc bn,Thi gian gn y,phong tro chp Macro c v c a chung. Cng nh mnh trc y, mt s bc mi voth lai ny khng trnh khi b ng. V vy, mnh mun chia s vi cc bn mt vi vn v chp nh Macroca bn thn, mt th lai m mnh rt thch.Tht vy, trong khi thi gian ngy cng khp kn v cng vic, nhng chuyn i chp nh xa thnh ph i hi phic thi gian v chi ph nht nh nn nhng chuyn i nh vy cng khng phi mun l i ngay c trong khiam m chp nh th khng lc no ngui. Vi nhng ngi n vi v, ng vi Computer v m thy tay ang bp c nh mnh th vic tm mt ti tha ni kht khao mi khi c cht thi gian qu tht kh khn, v Macrol mt ti han tan tha mn c iu .Lc u mnh cng rt b ng vk thut ny, nhn nhng nh ca bc VPT, Ravic chp ong bm mnh rt lngng m v tm hiu, cng c cc anh y hng dn tn tnh cng thm t vn v k thut ca bc Macatangnn mnh cng c u t mt vi dng c tin hnh chp Macro.

Qua thi gian thc t mnh ngh vic chp nh macro khng tht s kh khn nu bn chu kh v kin nhn.

Phng tin ca mnh l:Nikon D70s + Nikkor Micro 60mm f/2.8 + 2x teleconverter + Nikon Flash SB-800 + 20mm Extention tube (ci ny tdng).

K thut:K thut ch yu ca th lai ny theo mnh l khng ch tt DOF, v lai cn trng rt b nh nn khang cchrt gn (thng th khang di 10cm) DOF s rt mng (c th l vi mm). Mnh s ng khu tht nh c 16hay 22 c ly DOF tht su nu lai cn trng nh nh Rui hay Nhn.

Nh nh ny mnh set f=16:

Khi bn chp cng gn th cng phi khp nh khu .

Nh nh ny mnh set f=22:

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iu ny s ny ra mt kh khn l tc s khng c th bt kp ng tc v trnh rung my, m bo ntcng, tng ISO th noise nhiu. khc phc c iu ny mnh thng s dng n flash c c tc khng rung my, th nhng thng th khi khp khu v dng flash th background s ti thui, trong mt strng hp th iu ny s nhn mnh ch th mt cch n tng nhng cng c khi mnh thch ci backgroundmu xanh s du dng m i hn. iu ny th ty thch ca mi ngi. Mnh dng SB-800 ca Nikon nn flash st ng kim sat lng sng theo tc nn mnh thai mi set tc theo mnh, mnh thng set flash TTLBL (mnh ngh chc Canon cng vy thi).Vi nhng lai cn trng ln hn nh Bm hay chun chun th c v l d nhng tht ra mnh li thy kh hn.Phi khng ch tht tt ch th va r nhng background phi m. V lens cch xa ch th hn nn phi mkhu xa m background, mnh thng set 4 hoc 5.6,

Nh nh ny mnh set f=4.5:

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Nhng nu khng ch khng tt th backgound s r th mt hay. V li vi lai bm hay chun chun m dngflash th d b bng thng nhn rt kh chu nn chn gc chp qu tht rt kh khn, (lai ring flash dnh chochp macro khang trn 300USD).

i vi chun chun kim th cn phi gc my sao cho ly va nt c u ln ui con chun chun (songsong vi sensor). Nu tp tt k thut ny bn s d dng chp my ci mng nhn.

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Cn vic tm cc lai cn trng nh b cng l mt vic vui khng km.Bm th Tao n, S Th, m Sen, cha chin ng rung ch no cng c, ch phi tm con no p mthi, c con c bay sut khng bit mt, c con th hin kh nhng mu th xm xt thy m ght, c con th p vhay lm mu rt d tnh th li rch teng beng (chc do my ch bm c nghch qu ). Tm c mt con va th c m theo, rn rn, nh nh bc chn nh n trm.

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Ong th Tao n v Bch Tng Dip c l nhiu hn c (m Bch Tng Dip c th gi caf va ung va chplun), lai ny to hn con rui mt t nn DOF mt mi, c ci nhiu v ti n cng tham ht mt ly phn nnch quan tm n mnh. Chu kh phi nng v tm my con c eo phn cho n tng, tm bng c hai con mtlc th tuyt hn, ti ny khi ht mt th hay cp u xung nn nh canh n va ngng ln chun b bay chp sp hn, ko li b m l b cc xu. Cnc con ang bay m bc VPT vn chp c th mnh ang tp mcha c.

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Rui c th ch no cng c (khng phi rui nh nh xu u nh), lai ny hin nhng u nh, chp vi flash tht chuyn mn gi l b dp mt, lai ny hay cng bn lm (bc HuyQuanTic v XYZ hay khai thc khan ny).

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Cn rui xanh (nh nh u) th hay u ch my ci hoa nhn, lai ny mt to, chp t dp mt, ni chungmnh thch my thng ny hn v nh mnh c nhiu. Chp rui ni chung l d hn ong, hin thc, t bay.Nhn lng (lai Rau cu ca bc Maycatang) th hay trong k l, khi i chp macro th phi ch mi tm c lainy. Mnh thy n hay my cy i tng qun (nhn t di ln). Cn lai t lng th c mng nhn ng hang,lai ny bng b v trn vo, chp sao cho ly c my ci t nhn mi thch. Ni chung lai nhn tht c c,mnh bt qu tang thy n xi lun c ng lai mi gh ch.

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Chun chun cng c khng km, cng n tht ti lun:

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Lai chun chun xanh vn th xu m nhiu, rt hin v chu lm mu lm. Loi th bay ti ngy, mnh cha cc tm no ca n. Chun chun kim th hay ao t nc ng, hm i Ty Ninh chp c vi pht th chnmnh b vi con a n xi chy mu qu tri (m a xu qu ch khngmnh cng chp lun). Sau ny mi bitcch nh mnh my trm m c qu tri Chun chun kim lun. Lai ny theo mnh khng ch DOF kh nht, b t.Mnh thy my ln hai a ti n chi bn bi m chp khng c (thy bc Ravic c my kiu ny hay gh).Cc bc lu l cng vin lu lu h c xt thuc nn mu cht ht nh, ch khng nh bc Maycatang bothanhcong67 th tiu mu u.i, cn nhiu lai lm no l kin vng, b, co co, c sn v nhiu lai m mnh ch bit tn.Ni chung th lai ny tng kh m d, vy m khng thch th li l kh. Kh vy m chp xong xem trn mycha chc n, phi vo PC xem mi chc. Mnh hay canh nt k ri chp tng nh thi, chp hng lat cng cnhng flash np khng kp, ti. V li Raw chp nhiu xa mt. Thm na nn c tp chp khong cch gn nhtc th, tp b cc lun khi chp, v crop li cng crop t thi phng khi c tm ng ra 50x70cm nht con nt cngOK ch crop nhiu mt hay ca th lai ny mt.

Cc bc th i, c gng vy nhng chp xong m c c mt tm ng nt cng, lng l ln ht xem n sngc no, cc sng lun y ch.

Trn y l mt vi kinh nghim c nhn ca mnh, v cng mi chp nn khng trnh khi thiu st, mong cc bcgp thm.Cn nhng cch chp bng cchxoay ngc ng knh hay bng cch khc mong cc bc dng qua chia sthm.

Cm n cc bn,

Bi vit bi thanhcong67@ VNPhoto.net

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