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ZWO OAG‑L‑68
This is a large off-axis guider designed to split off a small portion of your telescope’s light path to a guide camera for auto-guiding while imaging with your main camera. It’s especially aimed at long focal-length astrophotography setups.
🔍 Key Features
Large 12 × 12 mm prism — much larger than typical OAG prisms, giving a wider field of view for guiding.
Effective light-pass aperture ~11.7 × 8.3 mm — helps capture enough guide stars for accurate tracking.
Thin profile (~17.5 mm thickness) — helps maintain correct backfocus distances in imaging train.
Can connect main camera and guide camera simultaneously — no separate guidescope needed.
Includes M48 sensor tilt plate (5 mm) — can help correct slight tilt between guide and imaging cameras.
Designed for use with ZWO gear like ZWO ASI guide cameras and often paired with the ZWO ASI461 versus standard OAG-L setups (OAG-L-68 variant is optimized for that).
