focus lens region 中文意思是什麼
focus lens region
解釋
透鏡聚焦范圍-
Load the high speed film, open the lens to its lowest f number and focus at infinity. select b for the shutter setting. mount the camera on a tripod and aim it at the desired region
用廣角鏡或標準鏡的相機,裝上快速底片,光圈全開,鏡頭調至無限遠,快門選b掣,用腳架支持相機指向欲攝的天區,用快門繩打開快門,曝光幾分鐘到一小時的固定攝影法,會把偶然出現于鏡頭前方的流星攝入底片。
分享友人