[問題] 請教鏡頭兩個問題
小弟是攝影新手,請教版上的高手底下兩個問題,懇請不賃賜教。
1. 光圈問題
底下這張圖是前幾天去高雄旗山燈會拍的,
很明顯可以看出手震糊掉了。
http://keitaro.myweb.hinet.net/P1020719.JPG
相機是Panasonic GF3、鏡頭是14-140這顆
http://0rz.tw/is5r5
光圈先決、F5.6、曝光1/2秒、ISO800、焦距15mm
這顆鏡頭最大的光圈就從4開始起跳了,拍這張時甚至只有5.6。
光圈不夠大導致使得快門拉長,導致手震,但是我即使f調到4也還是手震。
由於攝影我是新手,拍攝時我老弟站在我旁邊說什麼爛鏡頭竟然f最大只有4?
可是我找了panasonic所有M43系統的鏡頭後,
發現具有大光圈(f<3)的幾乎都是近距離的鏡頭,甚至於定焦鏡,
所以是我不該用這顆鏡頭來拍攝夜景、燈飾嗎?
我也想到開閃光燈,但是
a. GF3沒有熱靴,無法外接閃光燈,只能用內閃,但是內閃的效果...大家都知道。
b. 照理來說燈飾跟夜景不同,光源是充足的。但是像我拍的這情況,
光源明顯也不夠。所以是非上閃光燈不可?
另外,如果要拍遠距離的燈飾,閃光燈無用,光源又不足時,該怎麼處理呢?
2. 鏡頭的拍攝最短距離
之前買GF3時為了廣角鏡上來問過版眾,
我現在是這三顆7-14(廣角)、14-140、100-300。
焦段看起來是齊了,但是當我要近距離拍攝(ex:食物、花草...)時,
常發現GF3有無法對焦的情況。
以14-140這顆為例,M43系統換算成135mm的焦距要乘以2倍,
以最短距離來看14*2=28mm,直接算3cm好了。
我拍攝距離絕對高於這個數字,但是無法對焦。
我查到底下這網頁的資料
http://0rz.tw/7xQSO
告訴我說這顆鏡頭拍攝最短距離是0.5m,也就是50cm,這跟理論值3cm會不會差太多?
請教版上的各位,這是為什麼?
先謝謝各位了。
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