I have updated some of BraunsCNC's files to add some features I was looking for.  They can be found on my profiles at Thingiverse or PrusaPrinters

https://www.thingiverse.com/thing:3977448

https://www.prusaprinters.org/social/22177-bram109/prints

Let me know if you want any changes.  I am still messing around with the knob and rack and pinion on the mount.  I don't have a lens yet so I can't check the dimensions of the camera mount but let me know if you print one and it fits!

I live  outside  the US and would like to purchase the 3D printed parts from you.

Could you give me a price on them

Thank you

jeffhstuart@gmail.com

I would like to know more about the lens you used? the one example photo looks very sharp.

I did buy a 15$ aluminum alloy micoscope holder and used 2 Lego pieces to mount a M12 lens:
https://stamm-wilbrandt.de/en/forum/microscope.10cm.png
I achieved 0.121µm/pixel resolution by adding an aluminum tube added between camera sensor and lens, which is really cool:
https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=210605&start=50#p1409956

I used 1m long camera cable, which allowed me to use any of my PIs as needed.

This is video with 0.7µm/pixel resolution only. It shows the slowest motion I have ever captured, 0.347µm/s speed(!):
https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=210605&start=50#p1409065

Arducam sells 16MP IMX298 camera that does run on Raspberry Pi CSI-2 camera interface, which allows you to capture 4672x3496 frames, which might even get below v2 camera 0.121µm/pixel resolution. I have not tested, but

0.121*3280/4672=0.085µm/pixel resolution is likely possible with that camera:

Great work.  Just starting to work with the Pi Zero/W.  Could you just stream the video and watch it on your laptop at a static IP address?  Then you would only need a power cable.  Just a thought...

I'm also interested in streaming over wifi as I don't have an extra display.  Very nice work, I'm planning on building one!

Cool!

Nice project!!!

I got one of these lenses for my webcam microscope. works really well and cheap!! 

I think i paid about $5 delivered

https://www.ebay.co.uk/itm/HD-CCTV-Lens-3-0MP-M12-2-8-12mm-Varifocal-cctv-IR-HD-Lens-F1-4-manual-B5H4-/282980612091

Shockingly well made also :P

Sorry, can't help myself. I actually really like this - been looking for a microscope for the bench, so I'll have to keep this in mind. Those USB adapters hanging off the side make me a little nervous, though - I'd probably get a right-angle micro-USB cable to relocate the SD card adapter, and maybe power the Pi Zero off the header pins. 

Have you tried any precision work like soldering  under the scope yet? Just wondering how the ergonomics are.

for welding, it is necessary to have a stereoscopic vision, otherwise you lack the depth information and it is difficult to adjust the position of the tip of your soldering iron

It wouldn‘t be a great soldering microscope, at least with the lens I used. The distance between the lens and object is to small (<1cm) to hold a soldering iron in between comfortably.

Dan, I'd almost be inclined to use a Pi-3 or similar just to get the built in HDMI and extra USB-A ports.  It would be a bigger board, but maybe a tidier overall build given you'd connect the HDMI straight in, and the SD Card adapter could then be a USB Type-A micro SD dongle (something like this https://www.8immoto.com/products/typec-typea-reader).

That being said - it's a tidy mechanical build!

With a Pi 3/3B/3B+ the board could be mounted anywhere, even in the base, with just a ribbon cable running to the camera... 🤔

As compact and cost-effective as a Zero is, I'd be more inclined to go with a Pi 3 just for the more robust USB situation.  I've got three Pi Zeros, and by god I hate those micro USB ports with a passion. 😐

So... a "Pi-croscope"?

I'll let myself out.