TAB.  3
	RELATIVE RESOLVING POWER OF LENSES
	Theoretical, for perfect lenses, as function of the focal ratio
	( Reyleigh Criterion for λ=0,56μ )
	The absolute res. power depends on the diameter,
	and is measured in arcseconds
	FOCAL RATIO	lines / mm
	1	1640
	1,4	1170
	2	820
	2,8	580
	4	400
	5.6	290
	8	200
	11	150
	16	100
	22	75
	32	50
	45	35
	64	25
	90	18
	128	12
	note:
	for other wavelenghts and other criteria
	the values may be a little differents