Diop MWIR 3-5um 1x IR Microscope f3.0 objective lens

  

Diop MWIR 3-5um 1x IR Microscope f3.0 objective lens. Bayonet mount - fits such cameras as Amber Radiance, Indigo Merlin MWIR and Phoenix, Santa Barbara Focal Plane, IRCameras and so on. 83mm focusing working distance from lens front according to datasheet (I measured 92mm).

In the last picture - camera sensor is 256x256 30um - ruler 0.3 fits side - this is exactly 1X. No barrel distortion - as you can see.

There is no focusing ring - lens is fixed - move camera or target instead. 1X magnification - not a lot for "microscope" - but could be useful in some situations - like you try to figure out mystery sensor in your new vintage thermal camera - you can shoot video with your other thermal camera - as your sensor-in-question starts cooling down and wires become distinct for a moment.

This particular lens has built-in filter wheel. There are retaining rings but no filters.