But I can say that the bulb input is very similar to the one shown in the video, I don't want to put the wrong bulb in.

The microscope has two eyepieces, 5 objective lenses and also incorporates a lens. Superior for a barrel roll camera

In compound microscopes, the terms like "45X" and "10X" usually refer to the magnification levels of the objective lenses. These numbers indicate how much the image is magnified when observed through the microscope. However, these objective lenses are not typically designed for oil immersion. Oil immersion lenses are designed differently and have specific characteristics that make them suitable for use with immersion oil. Oil immersion objective lenses are used for higher magnification, typically 100X or higher. They are specially designed to work with immersion oil, which has a refractive index similar to that of glass. This oil is placed between the front lens of the objective and the glass slide, improving the numerical aperture and resolution of the microscope. This technique is particularly useful when observing very small and detailed structures, such as bacteria or fine cellular components. Lower magnification objective lenses, like 10X and 45X, are not designed for oil immersion because they are not intended for the same level of high-resolution work that requires oil immersion. Additionally, using immersion oil with lower magnification objectives might result in distorted images, reduced image quality, and even damage to the lens. So, while objective lenses are available in various magnifications, the use of oil immersion is specifically limited to higher magnification objectives that are designed for this purpose.

Hi! That's a more in-depth repair, unfortunately. You may need to consult your local microscope repair company. Sorry!