Which Computer system is required for this microscope?
Windows XP / VISTA /WIN7/WIN8 & Mac 10.6~10.8.
How does this work with the ipad?
It can't work with ipad and other laptop.
Is it easy to operate it?
Yes, just follow the instruction and install the software.Then you can use it. If you met any problem, you can contact the seller.
On 20x magnification, how far away is the lens from the subject?
Adjusting the focal ring changes the focal length. About 15mm space can be achieved between collar and work surface.
What format of picture/video files does the software produce?
The photo format is JPEG OR BMP. Video format is VGA.