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Eyepiece Simulator

Celestron EdgeHD 9.25 OTAWhirlpool

Telescope

Looking through

Apertura Super Wide Angle 20mm

118× • 36′ • 2.0mm exit pupil

★ Frames both the spiral and its companion with enough scale to hint at the arms.

Eyepieces

Wide field

Widest views — large nebulae & open clusters

General

Everyday deep-sky & the Moon

Planetary

Planets, double stars & fine detail

›Very high power(13) · Rarely usable — needs exceptional seeing

← 36′ → true field

70° apparent field

M51

Excellent fit· Apertura Super Wide Angle 20mm on the Celestron EdgeHD 9.25 OTA

Why this eyepiece?

A face-on spiral — its companion NGC 5195 is visible as a second smudge even in modest apertures.