Sweet spots
Also called: low power, medium power, high power, magnification range.
The three exit-pupil bands a good eyepiece kit covers: low (4–6 mm), medium (2–3 mm) and high power (0.7–1.2 mm).
Low power, with a 4–6 mm exit pupil, gives the widest, brightest views for large nebulae and clusters. Medium, 2–3 mm, suits galaxies, globulars and most deep-sky objects. High, 0.7–1.2 mm, is for the Moon, planets and close doubles.
In AstroPilot
My gear charts your eyepieces against the sweet spots and suggests what to add to fill a gap.