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In good, used condition.
The #777 Off-Axis Guider (OAG) permits use of a CCDAutoguider or guiding by an astrophotographer during long exposureastrophotograpy or imaging. Considered a “must have” item by manyastrophotographers. Requires use of an illuminated reticle eyepiece if guidingby eye. Illuminated reticle not included.
The OAG couples the camera or imager body to the telescopeand diverts a small part of the light at the edge of the telescopic field ofview to an illuminated reticle guiding eyepiece or a CCD Autoguider mounted at90 to the imaging camera. This small star field is then observed by thephotographer or Autoguider to detect any change of position in a selected guidestar, with continual small corrections being made to the telescopes drive basedon close observation of the stars movement.
The output of the OAG is a conventional industry standardT-thread. Many camera bodies incorporate this required female T-thread neededto attach the camera to this accessory. Mounting a film type SLR or DSLR camera to theOAG may require use of an appropriate T-Mount for that model camera. Pleaseconsult your camera operating manual for details. Camera and T-Mount notincluded.
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Category: Cameras and Photography:Telescopes and Binoculars:Telescope Parts and Accessories:Other Telescope Parts
Location: Birmingham