yes, my mistake : I was using https://github.com/JamesH65/userland.git
Now it´s working fine. Thanks!
with -ISO xxx a max. exposure time of 1/20s is applied.Kamera-Hersteller: RaspberryPi
Kamera-Modell: RP_OV5647
Belichtungszeit: 1.000s
ISO: 1000