I had the opportunity to buy a few 640 thermal cores off Aliexpress. Here are the results and thoughts. I will be doing a video comparison next, let me know what you would like to see.
I will be initiating a return/refund of the "false" 640s, let me know if you'd want to hear about my experience returning a "high ticket" item off AliExpress.
see what my options are to get the video "line" out.
Video quality: Something seem off, almost as if it is shot in a lower resolution, the outlines of bodies is very jagged, and video seems more "blotchy" makes me question the 640 resolution. I dont believe it meets the NETD >= 25 mk as advertised. I will be trying to return this.
Great resolution and detail, Looking at the wiring behind the 3D printer for comparison FMAi "larger", and Axisflying both have higher details. Very apparent when used as a stud finder the blacks are noticeably blotchier compared to the Axisflying camera
The biggest housing with exposed PCB, one of the best looking/detailed images tied with Axisflying.
They probably made a mistake and mislabeled the camera as 640, I will be returning this.
Looks as good the larger housing FMAi thermal camera.
FYI the blotch on the lower right was from a "friend" that pointed it to the sun....
I hope this helps others.
Let me know what you would like to see "filmed" for a video comparison.