Can't help with that but with photoshop you can zoom in on the images if all you are looking for is a picture

You may use photo eyepiece of 2x or you may use a camera from Optika Srl italy called DIGI which is having 3x optical zoom and can be used remotely.

The IX71 has a build-in sideport magnification changer, I think - maybe you can ask Olympus for a solution? Have not heard of a good c-mount changer yet. Once I used a very old Zeiss changer, but the picture quality decreased dramatically.

You don't say what camera and adapter you are currently using, although 1" faceplate sounds like you mean C-mount. If you happen to be using an 0.5X C-mount adapter, you could switch to a 1X adapter and double the magnification that way. If not, you could switch to a digital SLR camera adapter (which I and others make for the BX mount which is used on the IX70), which uses Olympus photo eyepieces which offer a range of magnifications, one of which would suit your goal.

http://www.truetex.com/micad.htm

Use 100x to see bacteria cells with used oilmmeration oil on slide . Used cameria sit on eye lens

Torsten: The entire IX line has a mag changer built into the infinity-corrected path just below the objective lens. Unfortunately our particular scope had its mag changer removed as part of a custom modification.

Richard: The transfer/projection lens in this system is part of the microscope body and can't be replaced. The connection to the camera is through an Olympus "circular" dovetail to c-mount adaptor. We inserted the Leeds Micro 2X changer right in front of the camera, but its aperture size is smaller than the face plate of the camera (a Hamamatsu SIT). I'd like to put in some large optics, 25mm-50mm to capture all the light, but it's the 2X (or more) change in magnification that I also need.

What you're describing as a circular dovetail must be the Olympus BX standard. See the attachment. The bottom half should match up if you print it at true size.

You still haven't said what C-mount adapter you're using. If it is 1X then there is no 2X you can just replace it with. If you happen to be using an 0.5X, then you could replace it with a 1X.

You could replace your present C-mount adapter with an Olympus photo eyepiece to get 1.67x, 2.5x, 3.3x, or more, in additional magnification.

Understand that any additional magnification factor is a corresponding decrease in light intensity at the camera.

The Galilean idea won't work except in afocal (infinity) space, not the focal portion of the path. You could add a negative lens, which both magnifies the image and moves it out so you have room for the extra element. Same principle as a Barlow lens on a telescope.

http://www.truetex.com/olympus_bx50_canon-ef.pdf

Iam not know about other methods to see in microscope .only know see by magnification 100x

Maybe some kind of extension ring might suit your purpose? My old telescope has an adjustable extension tube for 1.25" or T-mount. But then you always have to move the camera, and it might be that your SIT is too heavy?

http://www.edmundoptics.com/mechanics/techspec-optical-cage-system/cage-system-tubes/m23-2-adjustable-length-extension-tubes/3458

I'm sorry I do not know much about the power of magnification

Well, I have a weird Zeiss part named 4366163 (look for it into some old catalog).

The best I can find is the Luigs&Neumann part:

http://www.luigs-neumann.com/product/fourfold-changer

Hope this can help.

Just to be more precise: the zeiss part is named OPTOVAR.

Usually is is allocated between eyetube and relative microscope dovetail. I've seen that Zeiss did also a part for camera, as on EBAY can be seen, knowing that the OPTOVAR for eyetube won't connect to camera C mount (unless somebody has an idea how to... will be very welcome!!).

See OPTOVAR what it is. Very nice part!!