Adorama 28mm to T-mount Adapter: for Mounting 28mm Threaded Digital Cameras on a Telescope, Spotting Scope or Nightvision Scope.
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This is a 28mm thread to a T-mount (42mm) thread adapter. It allows all 28mm threaded cameras to be used with telescope and spotting scopes, through the use of a scope T-adapter. Most scope to T-adapters are available through the scope manufacturer.