ANATOMY OF A MICROSCOPE

EFFECT OF SPHERICAL ABERRATION

•Pincushion distortion

•Edges more magnified than center

•Barrel distortion

•Center more magnified than edges

•Can offset each other

–Most projector lens systems do this


	PERIPHERAL ELECTRONS are more refracted than central ones.
	Peripheral image is at a greater mag than central image.
	Peripheral image is at a different focal plane as well
	Result is PINCUSHION DISTORTION
	Exaggerated by very low magnification

	In DEMAGNIFYING MODE center is more magnified than edges.
	Result is BARREL DISTORTION.

	MOST MODERN SCOPES PLAY THESE OFF TO NEUTRALIZE THEM.