柔光放大又稱柔焦放大，是暗室放大術的一種，是在放大機鏡頭前加柔光鏡或用金屬絲網、尼龍紗網、塑膠網等替代柔光鏡，使照片影像柔和的放大方法。
內容簡介
光線透過柔光鏡發散，並均勻、柔和地投射在相紙上.柔光鏡表面的紋路密則柔光作用顯著，紋路疏則柔光作用較小.放大時，用大光圈，柔光效果明顯，用小光圈，柔光效果較差.散光式放大機投射光線均勻柔和，也具有柔光作用.其特點是，影像柔和、反差降低、可掩飾照片的缺點，烘托渲染朦朧的氣氛，且不影響照片影像的清晰度.該放大方法通常使用於製作人物肖像照片. Also known as soft focus to enlarge. Darkroom as a surgery to enlarge. Zoom lens in front of the mirror or a soft metalwire, nylon screening over alternatives such as soft plastic net mirror, so that photo imaging soft amplification method. Light Soft diffuse through the lens, anduniform, gently projected in the paper. Soft mirror's surface texture is soft dense significant effect on the soft texture is less sparse. zooming in, with large aperture, soft effect Obviously, with a small aperture, soft less effective. astigmatism amplification to project light uniformly soft, but also has a soft effect.Itscharacteristics are, video soft, contrast reduction can disguise the shortcomings of photographs, contrast rendering hazy atmosphere, and the does not affect the photo imageclarity. The amplification method commonly used in the production of portrait photographs.
