Tamron 12VM412ASIR Machine Vision Zoom Lens C-mount IR Corrected

Description

Good condition. Tested working on my Sony NEX-3C. (See last picture. Camera and C-NEX lens adapter not included.)
Focuses to as close as 10mm from the lens rim, creating very interesting pictures.
A high quality, software controlled CCD camera matching this lens, having a size slightly larger than a quarter is available from this seller on eBay.
Price is for one piece.
There are various C-mount adapters around. Some may not let you focus to infinity. I will replace the lens if it is defective but won't give refund because you cannot focus to infinity.
SPECIFICATIONS
Focal Length
4-12mm
Iris Range
F/1.2 - Close
Iris Operation
Manual
Focus Operation
Manual
Mount
C
1/2" Angle of View (wide/telephoto)
93.6° x 68.9°/31.2° x 23.4°
Focusing Range
0.3m ~
INF
Back Focus (in air)
10.157mm ~ 19.911mm
Filter Size
---
Operating Voltage
---
Weight
57.5 grams ± 4 grams
Operating Temperature
-20° C ~ +60° C