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.
[Update: This post seems to pop up in response to searches for stick insect eggs. One of my rather more interesting pictures is there.]
10 thoughts on “Camera Microscope Adapter”
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!
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…
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