Astronomic’s Astro-Tech 152EDT f/8 triplet apo refractor ($3999US) features a massive 3-inch rack-and-pinion focuser with a built-in camera-angle adjuster. The triplet objective includes a low-dispersion FK-61 ED element, as well as a Lanthanum element.
The Astro-Tech 152EDT OTA (with rings and both dovetails) weighs 29 pounds (13.1 kilograms). The focus tube includes a threaded 4-inch anodized extension that can be removed to accommodate a binoviewer or to make room for crazy-long imaging trains.
The interior of the focuser is lined with micro baffles to help with stray light. The focuser has many different ways to thread equipment on. The various thread sizes are M100x1 female thread, M92x1 female thread, M68x1 female thread. The optional .72x Reducer Field flattener threads directly on to the rear of the focuser. The visual end of the focuser uses a 2″ to 1.25″ Secure-Lock compression ring to make sure your eyepieces are locked in.
The objective uses FK61 as a center element with Lanthanum as the rear element. This combination provides excellent color correction and is fully multi-coated. The elements are housed in a temperature compensated cell that is collimatable.
The dew sheild is retractable and has a locking screw. The Astro- Tech 152EDTcomes with CNC tube rings with a Losmandy style dovetail on one side and a Vixen Style dovetail/handle on the other. A Vixen style finder scope shoe is pre-installed on the focuser body. Also included is a 2-inch quick-lock adapter, as well as a 2 inch-to-1.25-inch quick-lock compression-ring adapter. A thread in 3.0-inch, 0.72x reducer/field flattener is also available for $249US.
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