Flir Macro Lens Adapter

This is macro lens adapter for Flir infrared cameras and it uses 20mm HQ ZnSe lens. Focal lenght is 50.8mm, but other 20mm lenses should work also fine. This should be compatible with following Flir infrared camera models:

A-Series: A300, A310, A315, A320, A325, A325sc
B-Series: B200, B250, B300, B360 & B400
SC-Series: SC305
T-Series: T200, T250, T300, T360, T400, T420, T420bx, T440 & T440bx

I have tried it with Flir T250 and works well.

I sourced lens for this project from Ebay: http://www.ebay.com/itm/261623000116