Swift Science & Laboratory - Recent Questions, Troubleshooting & Support


Model number would be helpful. If the unit has not be subjected to moisture or other contaminants, I would guess there is an electronic problem. The rheostat could be dirty or defective.
If the control is not sealed, cleaning it might help. Something as simple as WD 40 could help.

Swift Science &... | Answered on Aug 14, 2019


You should find a small hex bolt or screw thread on the right hand side at the bottom of the head. Photographs would be helpful

Swift M3500... | Answered on Jan 11, 2016


Swift microscopes, as far as i know, don't readily come with a users manual like one would find for a standard home device. Nine fifties are of the simplest microscopes around, any guide to microscopy will do as a user's manual. As for repairs, anyone that is mechanically inclined and with the right tools (allen hex keys, screwdrivers, pliers, lubricant) will be able to fix one after a few minutes of tinkering with it. Don't panic.

Swift Science &... | Answered on Feb 19, 2014


Unfortunately, if you indeed have water or oil inside the lens it is probably ruined. Obviously the seals have deteriorated away. Objectives are practically irreparable. They cannot be disassembled. Very reasonable new and used Replacements are available at: Delta Optical Instruments, Inc. Inquire at: robin@deltaoi.com

Swift Science &... | Answered on Oct 19, 2013


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: robin@deltaoi.com

Swift M2251C... | Answered on Aug 28, 2013


the objective is dirty with oil. Clean this off and it should solve the problem. The oil if it has been there for a long time may dry and become hard to remove.

Swift M2251C... | Answered on May 19, 2013


I seem unable to get a user or service manual online, however at a guess I would think that the retaining mechanism is inside the "head" of this beastie, so in order to access you would need to undo the screw that retains the viewing piece, this should give you access to the internals, however you have to be vary carefull that you do not contaminate the microscope. it may be easier to send it to be "cleaned" and hopefully when it returns it will have been tightened up.

Swift M2251C... | Answered on Dec 31, 2012


Go on line to the Manufacturer's web site and request an owner's manuel for your microscope!

Swift Science &... | Answered on Dec 31, 2012


A good idea would be to check the wiring by taking it apart. if the wires are bad, you must get new ones and solder them to the light socket and the battery holder making sure not to cross the positive and negative wires.

Swift M5S... | Answered on Aug 04, 2011


most objectives and eyepieces are interchangeable between models of microscropes. There are however a few things that you need to be aware of. On the out side of the objective there are number written on them that look similiar to this:

100x/1.25
160/0.17

There maybe more writing then that, but usually at the very least you get this. The first part (100x) is the objective magnification, the 1.25 is the Numerical aperture, the 160 is the tube length (in mm), and the .17 is the cover-slip correctness. What you are most concerned with is the mechanical tube length. There are 3 common ones, 160, 210, and infinity. It is very important that you get an objective with the right tube mechanical tube length, or there is a very good chance it won't work. If you are working with slides, then it is a good idea to get one that is cover slip corrected, otherwise most of the other information is only real important to very specific applications.The other key variable is the threading. Most microscopes use what is call a standard RMS threading, however many educational or high end objectives will not have this.

The eyepieces are pretty straight forward. You just need to find one that that has an outside diameter of the sleeve that will fit the inside diameter of the tube it is going into. Beyond that, most eyepieces are pretty interchangeable amongst brands.

Swift Science &... | Answered on Jan 29, 2011

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