Looks like only you JJJ
Thanks for your replies but none the wiser
I found some forums that say at 400X you should be able to see blood cells. So I will have to work out how to do that - probably need to smear some blood on a slide or smear blood & water on a slide. We shall see.
Al, my microscope has the same type of focus with the object magnified at 20X & 400X. Could I ask a favor? Have a look at pages of a book, where 10 pages = 1mm, and tell me if the result is the same as mine.