Thread: Compound magnification

Originally Posted by Geezer

I spent a night a week for about 8 weeks when i worked for a major multi just learning a tiny bit about lenses. Focal length is the key and inter lens spacing is the answer, but, even with those things right, there may only be a little sweet spot in the middle of the lens at that magnification. A lot of things happen as light is diffracted and diffused through glass and different colors behave differently in a given lens.
~Richard

So true.

You really see it more with telescopes than microscopes. The eyepiece objective can come in all types of configurations Symmetrical, Plossl, Erfle, Orthoscopic, Konig, Nagler,Huygen, Ramsden and achromatic and non achromatic to name a few-har har.

Each configuration has different qualities depending on if you are using low or high power and want good eye relief and color correction and wide angle or not.

There's nothing like looking into a 2mm eyepiece which is smaller than the pupil of your eye.