HOW TO USE IDEAL-SCOPE PRODUCTS
You can also hold a ring so the diamond is facing you It is the same for all scopes.
If the backlight is too strong parts of the diamond will appear paler. This video explains why:
Too much Blue is bad because it means the light will be blocked by the person’s head and body.
Red is best because it is usually brighter lights up high.
Green is light that likely comes from the walls and maybe a window.
Ideal-Scope is easier to use, but ASET is great and best for fancy shaped diamonds.