Tau2 and Quark2 cameras each have unique considerations for changing lenses. Regardless of camera model, FLIR advises against customers changing lenses without first understanding the implications and consequences.
For qualified customers, FLIR can make an Advanced tab
through the camera control GUI. The features of the Advanced tab
include the capability to perform lens calibrations on Tau2 and Quark2
cameras. This field-calibration process requires the use of at least
one blackbody source (a uniform, controllable temperature reference)
that has an area greater than the diameter of the front of the lens.
The calibration routine calculates gain terms on a per-pixel basis with
the customer-supplied lens attached to the camera body, and stores the
customer-performed calibration in non-volatile camera memory. A PDF
file describing the process is here: Gain
Cal App Note
Tau2 324 and 336 cameras have three memory locations for lens calibration data. Tau2 640 cameras have two memory locations for calibration data. These locations can be accessed via the GUI, or by serial command. Tau2 cameras have different holders for wide FoV lenses and narrow FoV lenses.
Although Quark2 has the same memory features as Tau2, FLIR does not recommend changing lenses on Quark2. This is because the sensor package is extremely sensitive to debris that may be introduced when a lens is removed or installed. Any lens calibration activity should be performed in a clean room environment by qualified technicians or engineers.