I was going to suggest paying a visit to Amscope's website and looking at what images they captured from a trinocular SMZ-4NTP, images for a more expensive
microscope package that, we hope, bundles one of their best cameras. For example, this stock image that Amscope uses for various packages:
Oh dear. Even at 600x600 pixels resolution, you can see that the trinocular optics are plain miserable. If this is underpromising so as to exceed the customer's expectations, include me out.
For comparison, here is an image, with a similar resolution over the foreground, from the trinocular port of a grizzled, used microscope:
I took the image with a Wild M3, Wild Heerbrugg's bottom of the line, system microscope, forty years ago – and definitely not the model you would choose for microphotography. (Just look at those spherical aberrations!) Nonetheless, no guesses which microscope whose images I would choose to look at and work with all day.
What I am about to suggest, based on your recent threads, is that you might do what many have done. Start with a more basic, less expensive microscope to gain practical experience, one that you can make work for your purposes, although perhaps not quite as easily or pleasantly as you might wish. After discovering what works and does not work, and what is important and unimportant – for you – you can then invest in a nicer microscope you know that you will enjoy, that will do exactly what you want and very well. In short, first invest in your education, then in just the right tool.
That Wild M3 was my starter microscope and at first I held a cell phone over an eyepiece to document my work. In your case, you might start with the binocular SM-4B and use an eyepiece camera or a cell phone to get a feel and appreciation for photo/video imaging. Then later, if you feel so moved, you could buy a new Meiji Techno. Or a nice, used scope for less money (often much less) made by one the "big four": Nikon, Olympus, Zeiss or one of the several brands that merged into Leica Microsystems.
Just my two cents, in your favorite currency.