Problem Description
Microscope Out-of Focus/Poor Image Quality

Common Issue:
The slide is upside down
The stage height stop is set too low
The coverslip is missing or is too thick/thin
A dry objective has oil on it - common with 40x (clean off the oil)
No oil or insufficient oil contact when using 100x objective
The condenser is too low or the iris is closed

Problem Description
Microscope Does Not Stay In Focus

Common Issue:
The slide is not lying flat on the stage
The tension adjustment needs to be tightened
The nosepiece is not full engaged

Problem Description
Dirt/Dust In Field Of View

Common Issue:
If debris moves when you rotate the eyepiece, then the dirt is on the eyepiece
If there is a diminished view under one objective, then that objective has debris on it
The top of the condenser or lamphouse has debris on it
Problem Description
Camera Not In Focus While Eyepieces Are Focused

Common Issue:
Eyepieces not set at zero mark (set them to zero and re-focus)
C-Mount focus adjustment is not set properly (focus through eyepieces and then adjust the c-mount focus to match)
Make sure you have the proper c-mount for your microscope/camera
Make sure the eyepieces are secured

Problem Description
Seeing Double Image/Headache While Using Microscope

Common Issue:
Microscope could be out of alignment if bumped or dropped and needs repair
The focusing eyepiece is all the way up or down (make sure it is set at zero position)

If you need assistance with your microscope, we’re happy to help. Call Microscope Central at 800-219-1451 or email