The Sky-Watcher 12.5mm Illuminated Reticle Telescope Eyepiece is ideal for situations where you need precision guiding and alignment for your telescope. Whether you’re aligning your GoTo telescope or calibrating your auto guider’s tracking, this eyepiece is great for both tasks.
This multi-function guiding eyepiece features a laser-etched double cross hair reticle with a built-in battery illuminator.
Sky-Watcher 12.5mm Illuminated Reticle Telescope Eyepiece
Features:
- Battery included
- Focal length – 12.5mm
- Apparent field of view – 40 degree
- Plossl with Illuminated reticle
- Eye relief – 10mm
- Fitting – 1.25”
The Focal Length of your Telescope will determine the magnification and field of view of the eyepiece, here are some common lengths as a guide:
- 500mm = 50x @ 0.8 deg.
- 600mm = 60x @ 0.67 deg.
- 700mm = 70x @ 0.57 deg.
- 800mm = 80x @ 0.5 deg.
- 900mm = 90x @ 0.44 deg.
- 1000mm = 100x @ 0.4 deg.
- 1200mm = 120x @ 0.33 deg.
- 1500mm = 150x @ 0.27 deg.
- 2000mm = 200x @ 0.2 deg.
- 2500mm = 250x @ 0.16 deg.
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