BoliOptics 20X Infinity-Corrected Super-Long Working Distance (M Plan Apo HL) Apochromatic Metallurgical Microscope Objective Lens Working Distance 31mm MT06033441

so hi micro hunter here again and today i would like to talk about the microscope objectives and the different types of microscope objectives and when you go shopping for objectives you will discover that there are yeah quite low cost objectives around and they're also extremely expensive objectives the question is is why is that and how are they different and there was actually one of my viewers who was asking about the differences between so-called fluoride objective and s apple objectives so i would like to answer this question but first we have to talk a little bit about uh microscope optics and and why why there are no single lens or at least double lens microscopes around so for example why don't they make a microscope that have only one lens as an objective lens and then a second lens as an eyepiece lens that would be the simplest type of compound microscope as a matter of fact t