I have a Swift SM80 microscope and we are seeing double images. I can't seem to adjust

This is simply because the eyepieces are of lower quality than the ones you remember and have a smaller field of view.

Just inside the coarse focus knob you will see a "chrome" ring with holes it it. That ring needs to be tightened just a bit. It will make the coarse focus knob stiffer so tighten only enough to stop the downward drift of the stage. A funny looking tool should have come with the scope. It is used to adjust this "tension" ring.

First, a scope of this grade will not be completely in focus as you move from one magnification to the next. But it should be close enough that you do not loose your point of interest.
Be sure you are not pressing down on the stage specimen platform as you change magnifications. It is very sensitive to pressure. Also, be sure that the coarse focus tension is tight enough that the platform is not drifting down imperceptibly as switch magnifications. Look through the scope and watch if the image goes out of focus while you are watching it. If so, you have what is called "stage drift". This is corrected by tightening the tension on the coarse focus knob.
The tension adjustment is on the coase focus shaft. It looks like a chrome ring with about 3 holes in it. There should have been a strange looking tool that came with your scope. It is used to adjust the tension. If your specimen is "drifting" out of focus, simply tighten the tension ring a little bit at a time until the specimen no longer goes out of focus. Do not get it so tight that it is not easy to operate the coarse focus knob.

Here is the email address of Swift Microscopes - [email protected]
I have placed a request for the microscope manual. Let's find out.

Swift microscopes use standard objectives. You can get those from basically any source that sells them like VWR, Fishersci, Wardsci, Carolina biological, etc.

Classroom scopes get dirty very fast. This can cause the images to look dim and faded. Contact a Microscope Service Company. If you are in the Arkansas area that would be: Delta Optical Instruments, Inc. Email: [email protected]

Carolina Biological sells swift and carries parts for them. If this is not it, http://www.carolina.com/product/swift+upper+illuminator+lamp+m28hfz10.do?keyword=swift&sortby=bestMatches try calling them up and ask them if they have the part.

Hello--I have recently bought Swift eyepieces and objectives on UK Ebay.They come up regularly and sell for £4-£18 dependant on spec--any help?kind regards martin r

Try holding the Right knob so it does not move, whilst firmly moving the Left knob towards you (clockwise), this is the adjusting method used on Zeiss Jena 1960's High End microscopes, e.g Eduaval & Ergaval.
Good luck,
Alan Mowle

it looks like when you took this apart you did not alignt the lenses properly, there should be a locating groove or stub which these lenses should fit to... it looks like they are pressing against the stub but are not located properly, hence the distortion. try taking it apart again....when you put it back together again the fault may have gone.