I have seen there are some papers where they used optical microscopy to visualise bacterial growth in real time even just with contrast field.
The magnification used was 100x and the microscope had a z function to track the cells over time.
I do have a microscope with z function and I can get a 100x objective but it is an immersion one.
The question is: can I use an immersion 100x objective for live imaging of bacteria?