different ximea cameras have different behaviours when setting exposure above max

[carandraug]

When setting the camera exposure time with a value above the maximum exposure time of the camera, different cameras behave differently. One xiC will clip the value, while another xiQ will raise an error. This has been reported to ximea (it's ticket number 56174 on their internal ticket system).

With this code:

from ximea import xiapi

c = xiapi.Camera()
c.open_device()
print('maximum: ', c.get_exposure_maximum())
print('current: ', c.get_exposure())

c.set_exposure(c.get_exposure_maximum() + 1000)
print('after set above maximum: ', c.get_exposure())

c.start_acquisition()
print('after starting acquisition: ', c.get_exposure())

c.stop_acquisition()
c.close_device()

our xiC Model:MC023MG-SY-UB SN:CAMAU2018044 FwF1:01.25 API:V4.21.18.00 , returns:

maximum:  30000000.0
current:  38.0
after set above maximum:  30000998.0
after starting acquisition:  29999998.0

while our xiQ Model:MQ042MG-CM SN:23082950 FwF1: API:V4.21.18.00, raises an error:

maximum:  1000000.0
current:  28.0
Traceback (most recent call last):
[...]
ximea.xiapi.Xi_error: ERROR 11: Invalid arguments supplied