Unknown. Help us by suggesting a value. (Pentax K-01)
Unknown. Help us by suggesting a value. (Pentax K-1 + Pentax D FA 24-70mm HD f/2.8 ED SDM WR)
With a higher light sensitivity (ISO level), the sensor absorbs more light. This can be used to capture moving objects using a fast shutter speed, or to take images in low light without using a flash.
Maximum ISO: is this important to you?