Greetings- As will become abundantly clear from this post, I know very little about optics, so any and all help will be appreciated. I am a visual neuroscientist and I am attempting to project a visual stimulus through a camera port on a microscope, off a mirror, through the microscope objective, and down to the sample plane. I am facing two issues (that I am aware of so far). 1) The visual stimulus is being generated by a miniature DLP projector. The minimum focal distance of the projector is 23.6" at which distance the projected image is a 15" diagonal rectangle. The camera port into which I want to project the light stimulus is 1" in diameter. So, I need to add an additional lens close to the output of the projector to re-focus the image so that it can fit through the camera port. When I do this, however, the image from the projector will be out of focus since the lens will not be at the focal distance of projector. The closest I could get a new lens would be flush with the edge of the projector. This is ~1" from the projection lens and the diameter of the opening at that point is 1.25". The projection lens is listed as having an F/2.0; f=17.67 mm fixed lens. 2) Inside the microscope there is a lens element that has a 229.01 mm focal length. As far as I can tell I need the out-focus-image that I have captured from my projector to somehow end up focused (or relatively close to focused) when it reaches this lens. If anyone can provide any input regarding types of lens to use and where to position them in this set up I would really appreciate it. Even input like: "You have not provided enough information to figure this out, please provide the following additional information:" would help. Thanks in advance for any input/help.