GET IN CONTROL HOW TO SET THE SHUTTER SPEED
Use S mode for simplicity or M mode for more control. Both give you direct control over the length of the exposure
In S, or shutter-priority mode, you select the shutter speed and then the camera selects the lens aperture that will give the correct exposure. This isn’t always possible – the light may be too dark for the shutter speed you want, even at the lens’s widest aperture, or too bright even for the smallest aperture. Watch out for ‘Lo’ or ‘Hi’ warnings in the viewfinder. If you ignore them, the exposure will be wrong, but you can increase the ISO or use an ND filter to compensate in these situations.
In M, or Manual mode, it’s up to you to get the exposure right – you choose both the shutter speed and the lens aperture, using the exposure indicator in the viewfinder to check the exposure. Manual mode is useful when working with ND filters because these are often too dense to see through once they’re fitted, so you need check the framing and exposure before you add the filter, and then apply an exposure adjustment manually according to the strength of the filter.