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Starlight Xpress Slimline OAG & Extension Tube - SX-UOAG

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Starlight Xpress Ultra Slimline OAG Assembly
with 30 mm Extension Tube

The Starlight Xpress Ultra-Slimline Off-Axis Guider is a useful USB Filter Wheel accessory that makes accurate, flexure-free guiding easy to achieve. The extremely slim OAG assembly screws directly to the wheel face and adds only 13mm to the back focal distance of the wheel. The 10 x 8mm prism fully illuminates a Lodestar or EX guider CCD and the pick-off axis may be adjusted to optimize the guide image quality.

The SX-SLFW-OAG assembly can be used alone with the SX USB Filter Wheel and a Lodestar, SXV, or SXV-EX autoguider, all of which have very similar back focus, however, this package includes a 30 mm extension tube for those who use other cameras and need to adjust the back focus.

The Starlight Xpress AO/OAG extension screws into the top of the Ultra Slimline Off-Axis Guider. Adding the extension tube allows you to move the guide camera further away from the AOG prism, allowing you to compensate for a longer back focus of the main imaging camera.

Starlight Xpress cameras have a back focus of 17mm, and their OAGs are designed to work with these and other manufacturers’ cameras with similar back focal distances. However if the customer uses a camera with a much larger back focal distance, ie. a DSLR, the guider needs to be moved further away to achieve par focal operation.

The image shows a Starlight Express camera, USB filter wheel, slimline OAG, Lodestar, and adapter, most of which is sold separately.