Normally, the image seen through the viewfinder is an image with the aperture open. The preview mode sets the actual aperture you have selected allowing you to confirm the depth of field of the image.是什么意思_Normally, the image seen through the viewfinder is an image with the aperture open. The preview mode sets the actual aperture you have selected allowing you to confirm the depth of field of the image.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句