Show CPU temperature of RaspberryPi in shell

My DSLR-webcam is currently mounted on the southside of a roof.
At the moment germany is facing a strong heat-period.
So it's quite interesting to check the CPU-temp of the RaspberryPi.

You can do this by executing the following shell command:

vcgencmd measure_temp

In my case the output was today:

temp = 67.0'C

The datasheet of the CPU and also of the SD-card  says that these parts have a 'operating temperature' of -25 to +85 °C.
Everything OK here.

Just the EOS1100D operation is out of range:
Canon limits the official 'working temperature range' to 0-40°C