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DGM Optics OA-5.5 Off-Axis Reflector Telescope with Dobsonian Mount - $599 (Concord, NH)

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DGM Optics OA-5.5 Off-Axis Reflector Telescope with Dobsonian Mount 1
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condition: excellent

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Up for sale is a DGM Optics OA-5.5" off-axis Newtonian reflector, a rare and high-performance telescope ideal for planetary and lunar observation. This is a premium, unobstructed optical system—no central obstruction means you get incredibly sharp contrast and minimal diffraction artifacts.

PICKUP ONLY

🔭 Features:
Aperture: 5.5" (approx. 140mm)

Type: Off-axis Newtonian Reflector (rare design)

Mirror: Precision-coated primary mirror by Sion Applied Products, excellent condition with no flaking or visible degradation

Focuser: 1.25" rack-and-pinion (standard eyepiece size)

Mount: Custom Dobsonian-style base for smooth manual tracking

Condition: Used but well-cared-for; mirror is clean with only minor dust; optical performance remains strong. Some scratching on exterior.

💡 Notes:
The off-axis design eliminates the need for a secondary mirror, which results in higher contrast and sharper detail than standard Newtonians in this size class.

This is a custom or limited-production model from DGM Optics, well-regarded among telescope enthusiasts.

Perfect for lunar, planetary, and double-star observing where image quality matters.

post id: 7894428054

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