This Questar 3.5" camera coupling set consists of a swivel coupling and three adapter tubes in various lengths that stack together in various combinations for prime focus, eyepiece projection, and Barlow photography with 3.5" Questar telescopes only. It is threaded for Questar-specific accessories and can use optional Questar P-mount T-rings, eyepieces, and Barlows only.
The coupling set is supplied with Questar spotting scopes, but is optional with Questar astronomical and Duplex Scopes.
The swivel coupling threads into the Cassegrain focus at the rear of the 3.5" Questar control box. Thumbscrews allow the camera to be quickly rotated from a vertical to a horizontal orientation and locked in place at any orientation. The adapter tubes attach to the swivel coupling and are stacked in various combinations (alone for prime focus imaging, or with Questar eyepieces inserted into the adapter tubes for eyepiece projection photography, or with optional 1.5x and 2x Questar Barlows) to provide photographic focal lengths of 1400mm to 7400mm. The eyepiece projection distance varies depending on the number and arrangement of adapter tubes and where the eyepiece is positioned within the coupling stack. The Questar camera coupling set needs an optional Questar P-mount T-ring to connect to your camera.
Shipping is free on this Questar item if it is purchased with a Questar scope that is being drop-shipped to you from the Questar factory. A special order freight charge of $9.95 and a 14-day or longer delivery time apply if this item is purchased by itself as a special order item. A $15 Questar drop-ship charge will apply if faster delivery is required and it must be drop-shipped to you from Questar.
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