http://www.photomacrography.net/forum/userpix/954_DAPI_1.jpg Usually when these nuclei are fixed, the genetic material is destroyed, but here we see some of it having been ejected in the fixation process and preserved. Nikon N SIM 405 laser excitation 3D reconstruction Nikon Super Resolution Apo TI...

Zeiss AxiophotPol 25X Plan Neofluar DIC Multi Immersion
Nikon DS 5 C mount camera

Zeiss Axiophot Pol 25X Plan Neofluar Multi-Immersion.
Nikon DS5 C mount camera

So that's not too bad. I suspect somebody at one time separated the dovetail block from the bearing block and didn't put the adjusting shim back in from when the factory built the stand. Some have shims on the top, some on the bottom, some have none. It's the only way to adjust perpendicularly on th...

How many microns focus difference are there between top edge and bottom through the eyepieces? Use the markings on the fine knob to measure

Are you sure the shutter is in the open "time" position when you're installing the blades? The extra one just goes on top of the last one installed for spacing thickness

Are you sure the shutter is in the open "time" position when you're installing the blades? The extra one just goes on top of the last one installed for spacing thickness

Are you switching the viewing head and /or the stage back and forth?

Are you switching the viewing head and /or the stage back and forth?

What's happened is somebody had tightened the Allen bolt to the extreme. The mechanism has a female dovetail. It's dug into the soft male dovetail of the aluminum focusing part. If you can get a steel dowel of the exact diameter of the hole that the bolt fit into and rock that piece back and forth, ...

Are you using the same head on the labophot? Switching it between the two?

In short, no they are not.

Open the shutter mechanism by cocking and then releasing. The shutter is now in the open position at the Time setting. Install the blades in such an order that the blades are not blocking the aperture, but lay around just to the outside. Don't close the shutter while doing this or the blades will ju...

Hammers are excellent for denting bearing races. Use a heat gun on that silver oblong thingy and or an eye dropper with penetrating oil. The. Try to rock the stage mount side to side with your hands. No hammers.
Somebody over tightened the Allen bolt jamming that small silver dovetail clamp.

The top mechanism in your photo is the slow speed escapement with tiny gears. It removes as a unit with 2 small flatblade screws on either side. Soak it in acetone while actuating it's lever and then blow dry. If that doesn't restore the speeds, it may be too worn. I wouldn't oil it as oil spreads. ...