Review on 📷 ELP USB Camera Module 2.1mm Lens 1080p HD Free Driver - 2.0 Megapixel USB Camera for Linux Windows Android Mac OS by Chris Hernandez

I'll probably come back and edit this in a few months, but for now. I wanted to use the USB camera as a low power inspection microscope. I had an old USB microscope camera that never worked properly and decided to replace the camera board and lens. I want the working distance from the front of the lens to the workpiece to be between 12" and 24". Searching Revain I found a "stock" for this camera with a 2.8-12mm varifocal lens. I decided to make it the heart of my FrankenCamera. First, note that this camera comes with a second board (not shown in the Revain images) for the IR cut filter. After some fiddling, I installed the circuit board in the old case. The benefit here is that I now have the camera complete with a 1/4-20 tripod mount. The case also supports the installation of a CS lens. so I can use "S", "CS" or "C" mount lenses. I also have a Pentax PK to C mount adapter. All images were taken in natural room light. The frame rate seems a bit optimistic, but I was able to achieve 30fps with MJPEG in all modes. This camera realizes lower resolutions by cropping rather than merging. 1920 x 1080 is cleaner and brighter than lower resolution modes. I use the Linux Mint operating system. . I tried the software "GUVVIEW" and "QTCAM". Both work. Attached photos are from the 'GUVVIEW' package. It has the advantage that the image can be rotated and/or mirrored in real time. I first tried the included varifocal lens. Disappointing. At 11 inches from the desktop to the camera lens, the height of the field of view (1920 x 1080 at 30 fps) was 10 inches with the lens at maximum wide angle. At full telephoto the field view was reduced to 5 inches in height. It's a 2:1 ratio, not the advertised 4:1. Still, I can't read microprints on a 1/4 oz bottle with color testers. Then I tried several Pentax lenses. The old SMC Pentax 50mm F1.7 lens worked best. The distance from the lens to the desktop was 9-1/2 inches (the camera was in the same position). The upside was that I could read the label and the lens was MUCH easier to focus on. I ordered a manual Bosch 4-50mm CS mount lens. I find this to be a much better solution for my purposes. There are two stars deducted for the 2:1 variable lens.