AmScope AX-4-V300 Finite Achromatic Biological Objective Lense with Set Magnification and 160mm Tube

Great

The objectives work great in my old 1960s scope

Nice

I bought these to replace some crufty objectives on a microscope I'm rebuilding. They fit and work perfectly and give a very nice image. Their parfocal seems a bit off, but it's close. I wish you made a set that had a high objective of 60x instead of the 100x.

out of focus

Two out of the four achromatic lenses did not allow the scope to come into focus. In order to get the lenses into focus I had to unscrew the achromatic objective lenses almost to the end of the threads in order to get them to focus. Unacceptable.The standard set of objectives That came with my scope did not have this issue. I gave it a bad (not terrible) rating because two of the four ao lenses did work.