In a compound microscope, does the eyepiece need to have a focal length larger than that of the objective lens? If so, why? - Quora
Compound microscope - their parts and function - Microscopy4kids
Trinocular Microscope Lens, 30mm Microscope Eyepiece with 0.5X Objective Lens for Microscope Accessory(With 2.0X objective lens): Amazon.co.uk: Business, Industry & Science
Microscope World Blog: Stereo Microscope Magnification
Stereo microscope basics
The distance between the objective and eyepiece lenses in a microscope is 25 cm. The objective lens has a focal length of 6.00 mm and the eyepiece lens has a focal length