Camera C-Mount Lens Adapter ZCZQC 5mm C to CS Extension Tube for CCTV Security Cameras C-CS Mount Adaptor Spacer Ring

the camera in the eakins microscope will never focus without this .

Well finished, well made. Worked perfect to space my microscope camera into the focal range of my Amscope.

Fits perfectly! Exactly what we needed.

Camera side: fitment is 3/10 on my GH5 and GH2. It slots into the camera mount easily but has lots of rotational and axial play once “locked” and can be difficult to align for removal. Lens side: screws easily onto my C-mount lenses. The 25mm I am using, however, now can focus beyond infinity (distant objects become blurry again at max focus setting). This is not really a problem because I am viewfinder/screen focusing anyways, but zone focus with my lens’ printed distances is no longer accurate. This is probably the adapters fault for not being an exact match to C mount focal distance.

Smooth metal threads

If you're using this for the 2bitboy Camera+ you need to print the 31mm version. This says it's 30mm wide, but it is not.

Falsely advertised as 30mm diameter in product images when it is actually closer 31mm. This doesn't seem like much, but it makes it unusable for the project I'm working on. Which is very disappointing since now I will have to order a different part. Be aware of this if you, like me, are putting together the Gameboy Camera+, you may just have to print the 31mm model for the front housing rather than the 30mm like I did. Not 1 star because it does at least function at adapting CCTV lenses.