How about the height of the Bresser? It says that maximal height of the object is 70mm.
...
Probably it's true. I have a PCB holder which is ~9Cm height and I can't get it on focus.
But you can go higher than that, you have just to bend it like in this photo:
Or placing it on a raise.
The best thing of this microscope is that you have a very big working area, more than 20 Cm. But sometimes this is not a great thing, because it can only get things in focus at this distance. The focus system just turn the head up and down. Basically it has a fixed focus.
Sometimes this is very annoying because if you have an high workbench it force you to stay in a very uncomfortable position, or to work stand.
Most of the times I have to increase the height of my chair to work on it.
I wonder if there is an objective that reduces the focus distance, in order to work with higher objects.