"Thanks Peter. There are still some aberrations there, but they are not so pronounced.
I do not think in this case they are of different glass as they are both the same colour - I have some other lenses that are though. So I know what you mean.
Mike"
"Following on from my post,on researching further, I have found out that using two double convex lenses can make a very basic microscope. Though I have found details of experiments to form a flat image with one double convex lens, to date, I have…"
I have recently acquired these two lenses which look like book ends. They are very heavy as the supports are cast iron; the inserts are brass with one of the lenses being made to unscrew which I presume means a different one can be inserted. I…