The backlight light source is sufficient for the 4x and 10x completely out is at 40x little weak but still enough.
The same applies to incident light.
The 3 lenses with 4x, 10x and 40x magnification sing well finished and give a sharp image (40x magnification is a bit dark and slightly out of focus)
The 2 widefield eyepieces: 5x and 16x who I really liked.
The Barlow lens would school grade 4+ get to it is sufficient.
The stage is very fine and only suitable for children.
The color Filtercheiben do what they want, are not outstanding and not bad.
The PC eyepiece is sufficient for 10x lens still out there asreichende photos.
Overall, the microscope for the price very good and as for example pupils and students is set perfectly.
Also, I've heard that at Lidl a Biolux AL microscope is sold / is, which has worse image sharpness and quality.