Hello!
Good to see somebody else with an Amber camera. Couple of questions: Does the camera say Radiance HS or Amber Galileo? And also what version of firmware/software? If memory serves that should be on the analog video output unless it's been disabled.
As for the lens: There are several versions of the 75/250 that I've been able to dig up. One has DIOP part number of 22334 (3175.2 grams) and the other is 22696 (3628.8 grams). Everything else is listed the same (F/2.3, FOV 10.7 / 3.2 degrees, image 14mm, stop-fpa 26mm, bayonet mount, motorized focus / FOV, non-inverted image). Not sure what is different but the pictures I've seen show them painted black and the front optic appears to have different coatings. Could have sworn I had a drawing of the 22334 version but haven't located it yet. I'll need to dig around on another set of files. To muddy the water more is the lens part number I have is 22362 and it is the typical DIOP 'brown' color.
I'm with Fraser ... if the software is something you are able to share then I'd like to please request a copy ... Especially if it works with multiple camera firmware versions. The Usermenu required the firmware/control software to match. 1.1, 1.5, 1.51, 1.52, and 1.53 were the older versions.