Cahill Rooftop Observatory

Equipment Database - Astrola Zoom (8.4mm)

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Astrola Zoom (8.4mm)
Optical DesignZoom
Barrel Size1.25"
Threaded for FiltersNo
Focal Length8.4 mm
Field Stop7.4 mm
Apparent FOV50°
Eye Relief7 mm

Usable on:

We have one zoom eyepiece in our collection. Like many zoom eyepieces, it suffers from a narrow field of view and very dim images. Use at full power is not recommended.