| 1. | When taking photographs of the sun , the slowest film of speed iso25 is used . for moon , lunar eclipses and total solar eclipses , film of speed from iso100 to iso400 is suitable . whereas film of speed from iso400 to iso3200 fits for shooting star field , the milky way , nebulae , star clusters , galaxies and comets
拍摄太阳可以选用最慢速的底片2 5度拍摄月球日食及月食可选用中速1 0 0度至高速4 0 0度底片拍摄星野银河星云星系或彗星可选用高速4 0 0度至超高速3 2 0 0度底片。 |
