from picamera import PiCamera
from time import sleep

camera = PiCamera()
#camera.resolution = (1024, 768)
camera.resolution = (2592, 1944)
#camera.start_preview(alpha=255, fullscreen=False, window=(30,30,512,389))
camera.start_preview(alpha=255)
camera.crop = (0.0, 0.0, 1.0, 1.0)
sleep(30)
camera.capture('/home/pi/camera/image.jpg')
camera.zoom = (0.2, 0.2, 0.6, 0.6)
for i in range(2):
    sleep(30)
    camera.capture('/home/pi/camera/image%06d.jpg' % i)
camera.stop_preview()