If you want longer exposures than your lowest ISO can handle you can also use neutral density filters, which go over the lens and reduce the amount of light hit

If you want longer exposures than your lowest ISO can handle you can also use neutral density filters, which go over the lens and reduce the amount of light hitting the sensor. https://en.wikipedia.org/wiki/Neutral-density_filter https://en.wikipedia.org/wiki/Neutral-density_filter