I'm having a hard time wrapping my head around this situation I've come across. I'm essentially recreating a homemade microscope that my understanding would suggest shouldn't work. This setup uses a 10X Olympus PLAN N objective attached to a beam splitter to provide illumination. Then, 55 mm worth of extension tubes connect to a camera (Point Grey Grasshopper3 with a 1/1.2" sensor). There is no tube lens between the infinity corrected objective and the camera sensor (other than the beam splitter).
My understanding of how infinity corrected microscope systems works would seem to suggest that this shouldn't work, but a correctly oriented and seemingly undistorted image shows up on the camera.
Presumably, we aren't actually realizing the actual magnification this objective is designed to provide (in fact, its about half what it should be the sensor is 8 mm tall and a ruler placed in the view shows about 1.5 mm across the short dimension of image).
Can someone clarify what the light path looks like here and how we are actually able to see an image? Is it possible that the image quality is actually really poor, but we just seem to be getting results that are more than suitable for how we are using it?