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枫下拾英 / 摄影艺术 / 在craigslist廉價淘到了一個手動頭tamron sp 80-200/f2.8 with 2x teleconverter,今天試了以下.一是聚焦比較tricky因為我的相機viewfinder不大,很多時候難以精確聚焦,用liveview不太方便,二是exposure時常估計不准,再一個DOF,aperture控制得不好因為以前沒用過300mm以上
-lambkabob(lovebeijingduck);
2009-11-13
(#5679372@0)
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這個鏡頭主要拿來拍video因為video基本只能手動聚焦,focus ring very smooth,handle is wonderful.有一些測試照片,很多聚得不准或者aperture,DOF沒設好,顯得糊了,全部手持。室外的照片用了2x teleconverter,室內的除了兩張其餘沒有用2x。結論:要好好學習提高才行:D
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-lambkabob(lovebeijingduck);
2009-11-13
(#5679413@0)
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哗,你用香水洗澡啊?:D
-appleclassical(Zero Limits);
2009-11-14
(#5679477@0)
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提高的辦法1)幫助聚焦精確度可以用取景放大器放大viewfinder,主要是拍still有用;或者用zacuto z-finder(見link)這類的東東把liveview轉成view finder並且放大,同時隔離環境光,對video連續聚焦和still都有用
-lambkabob(lovebeijingduck);
2009-11-14
(#5679695@0)
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2)學習,實踐,積累經驗:都是免費的:D這張就是聚焦不准,聚在草地上而不是duck,因為太遠50m左右,viewfinder裡鴨子太小看不清楚,liveview又不能用因為環境光,而DOF又小,400mm/f5.6在50m距離上DOF大概3.5m,not enough for this shot,而f11可以提供7mDOF,需要學習再學習:D
-lambkabob(lovebeijingduck);
2009-11-14
(#5679718@0)
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went to the lake and practiced more today, keeper rate is getting up. one thing : the MF ring handles much smoother than AF lens. with a better viewfinder (bigger magnification), MF isn't too bad to use , except for sports.
-lambkabob(lovebeijingduck);
2009-11-14
(#5680527@0)