Camera Microscope Adapter

Microscope Eyepiece Adapter Parts

Microscope Eyepiece Adapter Parts

Mount and Camera

Mount and Camera

Camera on Microscope Eyepiece

Camera on Microscope Eyepiece

This worked out surprisingly well…

The project was to mount my pocket camera on the stereo zoom microscope, so I can take decent pix of small stuff.

The entrance pupil of the camera is about the same size as that of a human eyeball: focus at infinity, tune for best picture, and you’re set. Best of all, no microscope mods other than a wrap of tape around the eyepiece to prevent scratching.

My heap disgorged two tubes that were exactly the right diameter and length with finished ends (evidently stubs left over from a previous lathe project), so all I had to do was turn the adapter ring between them. The heap even had a slightly-too-long 1/4-20 thumbscrew with a boss below the thread. Ya gotta have stuff!

I set the ‘scope up with the eyepiece exactly vertical, put the tubes on the eyepiece, screwed the T-bracket to the camera,  squooshed a J-B Weld epoxy putty turd between the T and the tube, then boresighted the camera to the ‘scope axis by centering the light on the LCD. Shazam: nearly perfect alignment with no fussy machining. I added two machine screws through the blob: I don’t trust the camera to an epoxy-PVC joint.

The smallest field looks like 2 mm, so the resolution is about 2 mm/2400 = 800 nm, which I don’t believe for an instant. Maybe a micron or three, at best, limited far more by the camera than the ‘scope. Widest is >15 mm, a more reasonable and still unbelievable 6 microns. The lens just ain’t that good.

The eggs are from our stick insect, with a millimeter scale.


Stick Insect Eggs - 1 mm scale

[Update: This post seems to pop up in response to searches for stick insect eggs. One of my rather more interesting pictures is there.]

  1. #1 by Jeff on 2010-08-09 - 13:12

    Nice work. I have been meaning to make an adapter like this for months now. Yours is simple and yields great images.

    BTW, that microscope looks very familiar!

    • #2 by Ed on 2010-08-09 - 13:49

      You have a nice stand for yours. Me, I drilled a hole in a corner of the benchtop for a 5/16-inch socket-head set screw and bolted that sucker right down.

      During picture-taking sessions I put a machinist’s jack under the scope focus rack to eliminate wobbles and set the camera for a 2-second delay.

      After I figure out how to helix-mill some threads, I must build a compact ring light for the thing…

  1. Unsolderable Header Pins « The Smell of Molten Projects in the Morning
  2. Rudy Sunglasses Repair: Stress Cracking « The Smell of Molten Projects in the Morning
  3. Stick Insect Laying an Egg « The Smell of Molten Projects in the Morning
  4. Bed Bugs: Traps From Planet Powder « The Smell of Molten Projects in the Morning
  5. Microscope LED Ring Illuminator « The Smell of Molten Projects in the Morning
  6. Canon SX230HS Microscope and Close-up Macro Adapters « The Smell of Molten Projects in the Morning
  7. SX230HS Adapter: Mounting Screws « The Smell of Molten Projects in the Morning
  8. Casio EX-Z850 Backup Battery Replacement | The Smell of Molten Projects in the Morning