When you are using a really slow shutter speed (on a tripod) as the mirror shake as it flip up will cause the image to blur. Additionally when testing a lens for sharpness as it removes any chance of body shake influencing sharpness.Could any one please tell me as and when you`d use the mirror lockup when setting it in the custom setting
Lawrence F said:Remember to check your camera manual to find out how your particular mirror lock up works...with Canon you'll find that the first press of the shutter release simply locks up the mirror; you need a second press of the shutter release to actually expose the sensor!
Don't do what I did once, trying to achieve a long exposure of stars at night...'release' the shutter (mirror lockup) then come back 20 mins later to find it takes a second press!
If you use live view, the mirror is automatically permanently locked up - saves you diving into the menus. I always use live view on a tripod, great feature, unless it's so bright you can't see the LCD properly.